Multiple-input multiple-output (MIMO) spread-spectrum system and method
View Patent ↗A system and method for transmitting a plurality of spread-spectrum signals over a communications channel having fading. The plurality of spread-spectrum signals are radiated by a plurality of antennas, with each antenna preferably spaced by one-quarter wavelength. A plurality of receiver antennas receive the plurality of spread-spectrum signals and a plurality of fading spread-spectrum signals. Each receiver antenna is coupled to a plurality of matched filters having a respective plurality of impulse responses matched to the chip-sequence signals of the plurality of spread-spectrum signals. A RAKE and space-diversity combiner combines, for each respective chip-sequence signal, a respective plurality of detected spread-spectrum signals and a respective multiplicity of detected-multipath-spread-spectrum signals, to generate a plurality of combined signals. The symbol amplitudes can be measured and erasure decoding employed to improve performance.
1. A multiple-input-multiple-output (MIMO) method for receiving data having symbols, with the data having symbols demultiplexed into a plurality of subchannels of data, with the plurality of subchannels of data spread-spectrum processed with a plurality of chip-sequence signals, respectively, with each chip-sequence signal different from other chip-sequence signals in the plurality of chip-sequence signals, thereby generating a plurality of spread-spectrum-subchannel signals, respectively, with the plurality of spread-spectrum-subchannel signals radiated, using radio waves, from a plurality of antennas as a plurality of spread-spectrum signals, respectively, with the plurality of spread-spectrum signals passing through a communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, at least a first spread-spectrum signal having a first channel of data arriving from a first path of the multipath, and a second spread-spectrum signal having a second channel of data arriving from a second path of the multipath, comprising the steps of:
receiving the first spread-spectrum signal and the second spread-spectrum signal with a plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the first spread-spectrum signal as a first plurality of detected spread-spectrum signals, respectively;
detecting, at each receiver antenna of the plurality of receiver antennas, the second spread-spectrum signal as a second plurality of detected spread-spectrum signals, respectively;
combining, from each receiver antenna of the plurality of receiver antennas, each of the first plurality of detected spread-spectrum signals, thereby generating a first combined signal; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the second plurality of detected spread-spectrum signals, thereby generating a second combined signal.
2. The MIMO method as set forth in claim 1 , further comprising the step of multiplexing the first combined signal with the second combined signal, thereby generating a multiplexed signal.
3. The MIMO method, as set forth in claim 1 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a third spread-spectrum signal having a third channel of data arriving from any of the first path, the second path, or a third path of the multipath, further comprising the steps of:
receiving the third spread-spectrum signal with the plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the third spread-spectrum signal, as a third plurality of detected spread-spectrum signals; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the third plurality of detected spread-spectrum signals, thereby generating a third combined signal.
4. The MIMO method as set forth in claim 3 , further comprising the step of multiplexing the first combined signal, the second combined signal, and the third combined signal, thereby generating a multiplexed signal.
5. The MIMO method, as set forth in claim 3 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fourth spread-spectrum signal having a fourth channel of data arriving from any of the first path, the second path, the third path, or a fourth path of the multipath, further comprising the steps of:
receiving the fourth spread-spectrum signal with the plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the fourth spread-spectrum signal, as a fourth plurality of detected spread-spectrum signals; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the fourth plurality of detected spread-spectrum signals, thereby generating a fourth combined signal.
6. The MIMO method as set forth in claim 5 , further comprising the step of multiplexing the first combined signal, the second combined signal, the third combined signal, and the fourth combined signal, thereby generating a multiplexed signal.
7. The MIMO method, as set forth in claim 5 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fifth spread-spectrum signal having a fifth channel of data arriving from any of the first path, the second path, the third path of the multipath, the fourth path, or a fifth path, further comprising the steps of:
receiving the fifth spread-spectrum signal with the plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the fifth spread-spectrum signal, as a fifth plurality of detected spread-spectrum signals; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the fifth plurality of detected spread-spectrum signals, thereby generating a fifth combined signal.
8. The MIMO method as set forth in claim 7 , further comprising the step of multiplexing the first combined signal, the second combined signal, the third combined signal, the fourth combined signal, and the fifth combined signal, thereby generating a multiplexed signal.
9. A multiple-input-multiple-output (MIMO) system for receiving data having symbols, with the data having symbols demultiplexed into a plurality of subchannels of data, with the plurality of subchannels of data spread-spectrum processed with a plurality of chip-sequence signals, respectively, with each chip-sequence signal different from other chip-sequence signals in the plurality of chip-sequence signals, thereby generating a plurality of spread-spectrum-subchannel signals, respectively, with the plurality of spread-spectrum-subchannel signals radiated, using radio waves, from a plurality of antennas as a plurality of spread-spectrum signals, respectively, with the plurality of spread-spectrum signals passing through a communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, at least a first spread-spectrum signal having a first channel of data arriving from a first path of the multipath, and a second spread-spectrum signal having a second channel of data arriving from a second path of the multipath, comprising:
a plurality of receiver antennas for receiving the first spread-spectrum signal and the second spread-spectrum signal;
a plurality of despreading devices for detecting, at each receiver antenna of the plurality of receiver antennas, the first spread-spectrum signal and the second spread-spectrum signal, as a first plurality of detected spread-spectrum signals and a second plurality of detected spread-spectrum signals, respectively; and
a plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the first plurality of detected spread-spectrum signals, thereby generating a first combined signal, and for combining, from each receiver antenna of the plurality of receiver antennas, each of the second plurality of detected spread-spectrum signals, thereby generating a second combined signal.
10. The MIMO system as set forth in claim 9 , further comprising a multiplexer for multiplexing the first combined signal with the second combined signal, thereby generating a multiplexed signal.
11. The MIMO system as set forth in claim 9 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a third spread-spectrum signal having a third channel of data arriving from any of the first path, the second path, or a third path of the multipath, further comprising:
said plurality of receiver antennas for receiving the third spread-spectrum signal;
said plurality of despreading devices for detecting, at each receiver antenna of the plurality of receiver antennas, the third spread-spectrum signal, as a third plurality of detected spread-spectrum signals; and
said plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the third plurality of detected spread-spectrum signals, thereby generating a third combined signal.
12. The MIMO system as set forth in claim 11 , further comprising a multiplexer for multiplexing the first combined signal, the second combined signal, and the third combined signal, thereby generating a multiplexed signal.
13. The MIMO system, as set forth in claim 11 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fourth spread-spectrum signal having a fourth channel of data arriving from any of the first path, the second path, the third path, or a fourth path of the multipath, further comprising:
said plurality of receiver antennas for receiving the fourth spread-spectrum signal;
said plurality of despreading devices for detecting, at each receiver antenna of the plurality of receiver antennas, the fourth spread-spectrum signal, as a fourth plurality of detected spread-spectrum signals; and
said plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the fourth plurality of detected spread-spectrum signals, thereby generating a fourth combined signal.
14. The MIMO system as set forth in claim 13 , further comprising a multiplexer for multiplexing the first combined signal, the second combined signal, the third combined signal, and the fourth combined signal, thereby generating a multiplexed signal.
15. The MIMO system, as set forth in claim 13 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fifth spread-spectrum signal having a fifth channel of data arriving from any of the first path, the second path, or the third path of the multipath, the fourth path, or a fifth path, further comprising:
said plurality of receiver antennas for receiving the fifth spread-spectrum signal;
said plurality of spread-spectrum detectors for detecting, at each receiver antenna of the plurality of receiver antennas, the fifth spread-spectrum signal, as a fifth plurality of detected spread-spectrum signals; and
said plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the fifth plurality of detected spread-spectrum signals, thereby generating a fifth combined signal.
16. The MIMO system set forth in claim 15 , further comprising a multiplexer for multiplexing the first combined signal, the second combined signal, the third combined signal, the fourth combined signal, and the fifth combined signal, thereby generating a multiplexed signal.
17. A MIMO system for receiving data having symbols, with the data having symbols demultiplexed into a plurality of subchannels of data, with the plurality of subchannels of data spread-spectrum processed with a plurality of chip-sequence signals, respectively, with each chip-sequence signal different from other chip-sequence signals in the plurality of chip-sequence signals, thereby generating a plurality of spread-spectrum-subchannel signals, respectively, with the plurality of spread-spectrum-subchannel signals radiated, using radio waves, from a plurality of antennas as a plurality of spread-spectrum signals, respectively, with the plurality of spread-spectrum signals passing through a communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, at least a first spread-spectrum signal having a first channel of data arriving from a first path of the multipath, and a second spread-spectrum signal having a second channel of data arriving from a second path of the multipath, comprising:
receiver-antenna means for receiving the first spread-spectrum signal and the second spread-spectrum signal;
despreading means, coupled to said receiver-antenna means, for detecting, at each receiver antenna of the plurality of receiver antennas, the first spread-spectrum signal and the second spread-spectrum signal, as a first plurality of detected spread-spectrum signals and a second plurality of detected spread-spectrum signals, respectively; and
combiner means, coupled to said despreading means, for combining, from each receiver antenna of the plurality of receiver antennas, each of the first plurality of detected spread-spectrum signals, thereby generating a first combined signal, and for combining, from each receiver antenna of the plurality of receiver antennas, each of the second plurality of detected spread-spectrum signals, thereby generating a second combined signal.
18. The MIMO system as set forth in claim 17 , further comprising multiplexer means for multiplexing the first combined signal with the second combined signal, thereby generating a multiplexed signal.
19. The MIMO system as set forth in claim 17 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a third spread-spectrum signal having a third channel of data arriving from any of the first path, the second path, or a third path of the multipath, further comprising:
said receiver-antenna means for receiving the third spread-spectrum signal;
said despreading means for detecting, at each receiver antenna of the plurality of receiver antennas, the third spread-spectrum signal, as a third plurality of detected spread-spectrum signals; and
said combiner means for combining, from each receiver antenna of the plurality of receiver antennas, each of the third plurality of detected spread-spectrum signals, thereby generating a third combined signal.
20. The MIMO method as set forth in claim 19 , further comprising multiplexer means for multiplexing the first combined signal, the second combined signal, and the third combined signal, thereby generating a multiplexed signal.
21. The MIMO system, as set forth in claim 19 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fourth spread-spectrum signal having a fourth channel of data arriving from any of the first path, the second path, the third path, or a fourth path of the multipath, further comprising:
said receiver-antenna means for receiving the fourth spread-spectrum signal;
said despreading means for detecting, at each receiver antenna of the plurality of receiver antennas, the fourth spread-spectrum signal, as a fourth plurality of detected spread-spectrum signals; and
said combiner means for combining, from each receiver antenna of the plurality of receiver antennas, each of the fourth plurality of detected spread-spectrum signals, thereby generating a fourth combined signal.
22. The MIMO system as set forth in claim 21 , further comprising multiplexer means for multiplexing the first combined signal, the second combined signal, the third combined signal, and the fourth combined signal, thereby generating a multiplexed signal.
23. The MIMO system, as set forth in claim 21 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fifth spread-spectrum signal having a fifth channel of data arriving from any of the first path, the second path, or the third path of the multipath, the fourth path, or a fifth path, further comprising:
said receiver-antenna means for receiving the fifth spread-spectrum signal;
said despreading means for detecting, at each receiver antenna of the plurality of receiver antennas, the fifth spread-spectrum signal, as a fifth plurality detected spread-spectrum signals; and
said combiner means for combining, from each receiver antenna of the plurality of receiver antennas, each of the fifth plurality of detected spread-spectrum signals, thereby generating a fifth combined signal.
24. The MIMO system as set forth in claim 23 , further comprising multiplexer means for multiplexing the first combined signal, the second combined signal, the third combined signal, the fourth combined signal, and the fifth combined signal, thereby generating a multiplexed signal.
25. A multiple input multiple output (MIMO) method improvement, for transmitting data having symbols, over a communications channel, comprising the steps of:
demultiplexing the data into a plurality of subchannels of data;
spread-spectrum processing the plurality of subchannels of data, with the plurality of subchannels of data spread-spectrum processed with a plurality of chip-sequence signals, respectively, with each chip-sequence signal different from other chip-sequence signals in the plurality of chip-sequence signals, thereby generating a plurality of spread-spectrum-subchannel signals, respectively;
radiating from a plurality of antennas, using radio waves, the plurality of spread-spectrum-subchannel signals, over the communications channel, as a plurality of spread-spectrum signals, respectively;
imparting, from the communications channel, multipath on the plurality of spread-spectrum signals, thereby generating at least a first spread-spectrum signal having a first channel of data arriving from a first path of the multipath, and a second spread-spectrum signal having a second channel of data arriving from a second path of the multipath;
receiving the first spread-spectrum signal and the second spread-spectrum signal with a plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the first spread-spectrum signal and the second spread-spectrum signal, as a first plurality of detected spread-spectrum signals and a second plurality of detected spread-spectrum signals, respectively;
combining, from each receiver antenna of the plurality of receiver antennas, each of the first plurality of detected spread-spectrum signals, thereby generating a first combined signal; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the second plurality of detected spread-spectrum signals, thereby generating a second combined signal.
26. The MIMO method as set forth in claim 25 , further comprising the step of multiplexing the first combined signal with the second combined signal, thereby generating a multiplexed signal.
27. The MIMO method, as set forth in claim 25 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, with a third spread-spectrum signal having a third channel of data arriving from any of the first path, the second path, or a third path of the multipath, further comprising the steps of:
receiving the third spread-spectrum signal with the plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the third spread-spectrum signal, as a third plurality of detected spread-spectrum signals; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the third plurality of detected spread-spectrum signals, thereby generating a third combined signal.
28. The MIMO method as set forth in claim 27 , further comprising the step of multiplexing the first combined signal, the second combined signal, and the third combined signal, thereby generating a multiplexed signal.
29. The MIMO method, as set forth in claim 27 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, with a fourth spread-spectrum signal having a fourth channel of data arriving from any of the first path, the second path, the third path, or a fourth path of the multipath, further comprising the steps of:
receiving the fourth spread-spectrum signal with the plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the fourth spread-spectrum signal, as a fourth plurality of detected spread-spectrum signals; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the fourth plurality of detected spread-spectrum signals, thereby generating a fourth combined signal.
30. The MIMO method as set forth in claim 29 , further comprising the step of multiplexing the first combined signal, the second combined signal, the third combined signal, and the fourth combined signal, thereby generating a multiplexed signal.
31. The MIMO method, as set forth in claim 29 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fifth spread-spectrum signal having a fifth channel of data arriving from any of the first path, the second path, the third path of the multipath, the fourth path, or a fifth path, further comprising the steps of:
receiving the fifth spread-spectrum signal with the plurality of receiver antennas;
detecting, at each receiver antenna of the plurality of receiver antennas, the fifth spread-spectrum signal, as a fifth plurality of detected spread-spectrum signals; and
combining, from each receiver antenna of the plurality of receiver antennas, each of the fifth plurality of detected spread-spectrum signals, thereby generating a fifth combined signal.
32. The MIMO method as set forth in claim 31 , further comprising the step of multiplexing the first combined signal, the second combined signal, the third combined signal, the fourth combined signal, and the fifth combined signal, thereby generating a multiplexed signal.
33. A multiple input multiple output (MIMO) system, for transmitting data having symbols, over a communications channel, comprising:
a demultiplexer for demultiplexing the data into a plurality of subchannels of data;
a plurality of spread-spectrum devices for spread-spectrum processing the plurality of subchannels of data, with the plurality of subchannels of data spread-spectrum processed with a plurality of chip-sequence signals, respectively, with each chip-sequence signal different from other chip-sequence signals in the plurality of chip-sequence signals, thereby generating a plurality of spread-spectrum-subchannel signals, respectively;
a plurality of transmitter antennas for radiating, using radio waves, the plurality of spread-spectrum-subchannel signals, over the communications channel, as a plurality of spread-spectrum signals, respectively;
said communications channel for imparting multipath on the plurality of spread-spectrum signals, thereby generating at least a first spread-spectrum signal having a first channel of data arriving from a first path of the multipath, and a second spread-spectrum signal having a second channel of data arriving from a second path of the multipath;
a plurality of receiver antennas for receiving the first spread-spectrum signal and the second spread-spectrum signal;
a plurality of despreading devices for detecting, at each receiver antenna of the plurality of receiver antennas, the first spread-spectrum signal and the second spread-spectrum signal, as a first plurality of detected spread-spectrum signals and a second plurality of detected spread-spectrum signals, respectively; and
a plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the first plurality of detected spread-spectrum signals, thereby generating a first combined signal, and for combining, from each receiver antenna of the plurality of receiver antennas, each of the second plurality of detected spread-spectrum signals, thereby generating a second combined signal.
34. The MIMO system as set forth in claim 33 , further comprising a multiplexer for multiplexing the first combined signal with the second combined signal, thereby generating a multiplexed signal.
35. The MIMO system as set forth in claim 33 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a third spread-spectrum signal having a third channel of data arriving from any of the first path, the second path, or a third path of the multipath, further comprising:
said plurality of receiver antennas for receiving the third spread-spectrum signal;
said plurality of despreading devices for detecting, at each receiver antenna of the plurality of receiver antennas, the third spread-spectrum signal, as a third plurality of detected spread-spectrum signals; and
said plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the third plurality of detected spread-spectrum signals, thereby generating a third combined signal.
36. The MIMO system as set forth in claim 35 , further comprising a multiplexer for multiplexing the first combined signal, the second combined signal, and the third combined signal, thereby generating a multiplexed signal.
37. The MIMO system, as set forth in claim 35 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fourth spread-spectrum signal having a fourth channel of data arriving from any of the first path, the second path, the third path, or a fourth path of the multipath, further comprising:
said plurality of receiver antennas for receiving the fourth spread-spectrum signal;
said plurality of despreading devices for detecting, at each receiver antenna of the plurality of receiver antennas, the fourth spread-spectrum signal, as a fourth plurality of detected spread-spectrum signals; and
said plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the fourth plurality of detected spread-spectrum signals, thereby generating a fourth combined signal.
38. The MIMO system as set forth in claim 37 , further comprising a multiplexer for multiplexing the first combined signal, the second combined signal, the third combined signal, and the fourth combined signal, thereby generating a multiplexed signal.
39. The MIMO system, as set forth in claim 37 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fifth spread-spectrum signal having a fifth channel of data arriving from any of the first path, the second path, or the third path of the multipath, the fourth path, or a fifth path, further comprising:
said plurality of receiver antennas for receiving the fifth spread-spectrum signal;
said plurality of spread-spectrum detectors for detecting, at each receiver antenna of the plurality of receiver antennas, the fifth spread-spectrum signal, as a fifth plurality of detected spread-spectrum signals; and
said plurality of combiners for combining, from each receiver antenna of the plurality of receiver antennas, each of the fifth plurality of detected spread-spectrum signals, thereby generating a fifth combined signal.
40. The MIMO system set forth in claim 39 , further comprising a multiplexer for multiplexing the first combined signal, the second combined signal, the third combined signal, the fourth combined signal, and the fifth combined signal, thereby generating a multiplexed signal.
41. A multiple input multiple output (MIMO) system, for transmitting data having symbols, over a communications channel, comprising:
demultiplexer means for demultiplexing the data into a plurality of subchannels of data;
spread-spectrum processing means for spread-spectrum processing the plurality of subchannels of data, with the plurality of subchannels of data spread-spectrum processed with a plurality of chip-sequence signals, respectively, with each chip-sequence signal different from other chip-sequence signals in the plurality of chip-sequence signals, thereby generating a plurality of spread-spectrum-subchannel signals, respectively;
a plurality of transmitter-antenna means for radiating, using radio waves, the plurality of spread-spectrum-subchannel signals, over the communications channel, as a plurality of spread-spectrum signals, respectively;
said communications channel for imparting multipath on the plurality of spread-spectrum signals, thereby generating at least a first spread-spectrum signal having a first channel of data arriving from a first path of the multipath, and a second spread-spectrum signal having a second channel of data arriving from a second path of the multipath;
receiver-antenna means for receiving the first spread-spectrum signal and the second spread-spectrum signal;
despreading means, coupled to said receiver-antenna means, for detecting, at each receiver antenna of the plurality of receiver antennas, the first spread-spectrum signal and the second spread-spectrum signal, as a first plurality of detected spread-spectrum signals and a second plurality of detected spread-spectrum signals, respectively; and
combiner means, coupled to said despreading means, for combining, from each receiver antenna of the plurality of receiver antennas, each of the first plurality of detected spread-spectrum signals, thereby generating a first combined signal, and for combining, from each receiver antenna of the plurality of receiver antennas, each of the second plurality of detected spread-spectrum signals, thereby generating a second combined signal.
42. The MIMO system as set forth in claim 41 , further comprising multiplexer means for multiplexing the first combined signal with the second combined signal, thereby generating a multiplexed signal.
43. The MIMO system as set forth in claim 41 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a third spread-spectrum signal having a third channel of data arriving from any of the first path, the second path, or a third path of the multipath, further comprising:
said receiver-antenna means for receiving the third spread-spectrum signal;
said despreading means for detecting, at each receiver antenna of the plurality of receiver antennas, the third spread-spectrum signal, as a third plurality of detected spread-spectrum signals; and
said combiner means for combining, from each receiver antenna of the plurality of receiver antennas, each of the third plurality of detected spread-spectrum signals, thereby generating a third combined signal.
44. The MIMO system as set forth in claim 43 , further comprising multiplexer means for multiplexing the first combined signal, the second combined signal, and the third combined signal, thereby generating a multiplexed signal.
45. The MIMO system, as set forth in claim 43 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fourth spread-spectrum signal having a fourth channel of data arriving from any of the first path, the second path, the third path, or a fourth path of the multipath, further comprising:
said receiver-antenna means for receiving the fourth spread-spectrum signal;
said despreading means for detecting, at each receiver antenna of the plurality of receiver antennas, the fourth spread-spectrum signal, as a fourth plurality of detected spread-spectrum signals; and
said combiner means for combining, from each receiver antenna of the plurality of receiver antennas, each of the fourth plurality of detected spread-spectrum signals, thereby generating a fourth combined signal.
46. The MIMO system as set forth in claim 45 , further comprising multiplexer means for multiplexing the first combined signal, the second combined signal, the third combined signal, and the fourth combined signal, thereby generating a multiplexed signal.
47. The MIMO system, as set forth in claim 45 , for receiving data having symbols, from the communications channel having multipath, thereby generating, from the plurality of spread-spectrum signals, a fifth spread-spectrum signal having a fifth channel of data arriving from any of the first path, the second path, or the third path of the multipath, the fourth path, or a fifth path, further comprising:
said receiver-antenna means for receiving the fifth spread-spectrum signal;
said despreading means for detecting, at each receiver antenna of the plurality of receiver antennas, the fifth spread-spectrum signal, as a fifth plurality detected spread-spectrum signals; and
said combiner means for combining, from each receiver antenna of the plurality of receiver antennas, each of the fifth plurality of detected spread-spectrum signals, thereby generating a fifth combined signal.
48. The MIMO system as set forth in claim 47 , further comprising multiplexer means for multiplexing the first combined signal, the second combined signal, the third combined signal, the fourth combined signal, and the fifth combined signal, thereby generating a multiplexed signal.
49. The MIMO method as set forth in claim 1 with the step of detecting the first spread-spectrum signal and the second spread-spectrum signal, including the step of detecting, responsive to a first chip-sequence signal and to a second chip-sequence signal, the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
50. The MIMO method as set forth in claim 3 with the step of detecting the third spread-spectrum signal, including the step of detecting, responsive to a third chip-sequence signal, the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
51. The MIMO method as set forth in claim 5 with the step of detecting the fourth spread-spectrum signal, including the step of detecting, responsive to a fourth chip-sequence signal, the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
52. The MIMO method as set forth in claim 7 with the step of detecting the fifth spread-spectrum signal, including the step of detecting, responsive to a fifth chip-sequence signal, the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
53. The MIMO system as set forth in claim 9 with said plurality of despreading devices, responsive to a first chip-sequence signal and to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
54. The MIMO method as set forth in claim 11 with said plurality of despreading devices, responsive to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
55. The MIMO system as set forth in claim 13 with said plurality of despreading devices, responsive to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
56. The MIMO system as set forth in claim 15 with said plurality of despreading devices, responsive to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
57. The MIMO system as set forth in claim 17 with said despreading means, responsive to a first chip-sequence signal and to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
58. The MIMO system as set forth in claim 19 with said despreading means, responsive to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
59. The MIMO system as set forth in claim 21 with said despreading means, responsive to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
60. The MIMO system as set forth in claim 23 with said despreading means, responsive to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
61. The MIMO method as set forth in claim 25 with the step of detecting the first spread-spectrum signal and the second spread-spectrum signal, including the step of detecting, responsive to a first chip-sequence signal and to a second chip-sequence signal, the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
62. The MIMO method as set forth in claim 27 with the step of detecting the third spread-spectrum signal, including the step of detecting, responsive to a third chip-sequence signal, the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
63. The MIMO method as set forth in claim 29 with the step of detecting the fourth spread-spectrum signal, including the step of detecting, responsive to a fourth chip-sequence signal, the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
64. The MIMO method as set forth in claim 31 with the step of detecting the fifth spread-spectrum signal, including the step of detecting, responsive to a fifth chip-sequence signal, the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
65. The MIMO system as set forth in claim 33 with said plurality of despreading devices, responsive to a first chip-sequence signal and to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
66. The MIMO system as set forth in claim 35 with said plurality of despreading devices, responsive to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
67. The MIMO system as set forth in claim 37 with said plurality of despreading devices, responsive to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
68. The MIMO system as set forth in claim 39 with said plurality of despreading devices, responsive to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
69. The MIMO system as set forth in claim 41 with said despreading means, responsive to a first chip-sequence signal and to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
70. The MIMO system as set forth in claim 42 with said despreading means, responsive to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
71. The MIMO system as set forth in claim 43 with said despreading means, responsive to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
72. The MIMO system as set forth in claim 44 with said despreading means, responsive to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
73. The MIMO method as set forth in claim 1 with the step of detecting the first spread-spectrum signal and the second spread-spectrum signal, including the step of detecting, using a first filter matched to a first chip-sequence signal and a second filter matched to a second chip-sequence signal, the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
74. The MIMO method as set forth in claim 3 with the step of detecting the third spread-spectrum signal, including the step of detecting, using a third filter matched to a third chip-sequence signal, the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
75. The MIMO method as set forth in claim 5 with the step of detecting the fourth spread-spectrum signal, including the step of detecting, using a fourth filter matched to a fourth chip-sequence signal, the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
76. The MIMO method as set forth in claim 7 with the step of detecting the fifth spread-spectrum signal, including the step of detecting, using a fifth filter matched to a fifth chip-sequence signal, the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
77. The MIMO system as set forth in claim 9 with said plurality of despreading devices including a first filter matched to a first chip-sequence signal and a second filter matched to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
78. The MIMO system as set forth in claim 13 with said plurality of despreading devices including a third filter matched to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
79. The MIMO system as set forth in claim 13 with said plurality of despreading devices including a fourth filter matched to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
80. The MIMO system as set forth in claim 15 with said plurality of despreading devices including a fifth filter matched to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
81. The MIMO system as set forth in claim 17 with said despreading means including a first filter matched to a first chip-sequence signal and a second filter matched to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
82. The MIMO system as set forth in claim 19 with said despreading means including a third filter matched to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
83. The MIMO system as set forth in claim 21 with said despreading means including a fourth filter matched to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
84. The MIMO system as set forth in claim 23 with said despreading means including a fifth filter matched to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
85. The MIMO method as set forth in claim 25 with the step of detecting the first spread-spectrum signal and the second spread-spectrum signal, including the step of detecting, using a first filter matched to a first chip-sequence signal and a second filter matched to a second chip-sequence signal, the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
86. The MIMO method as set forth in claim 27 with the step of detecting the third spread-spectrum signal, including the step of detecting, using a third filter matched to a third chip-sequence signal, the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
87. The MIMO method as set forth in claim 29 with the step of detecting the fourth spread-spectrum signal, including the step of detecting, using a fourth filter matched to a fourth chip-sequence signal, the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
88. The MIMO method as set forth in claim 31 with the step of detecting the fifth spread-spectrum signal, including the step of detecting, using a fifth filter matched to a fifth chip-sequence signal, the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
89. The MIMO system as set forth in claim 33 with said plurality of despreading devices including a first filter matched to a first chip-sequence signal and a second filter matched to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
90. The MIMO system as set forth in claim 35 with said plurality of despreading devices, including a third filter matched to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
91. The MIMO system as set forth in claim 37 with said plurality of despreading devices including a fourth filter matched to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
92. The MIMO system as set forth in claim 39 with said plurality of despreading devices including a fifth filter matched to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.
93. The MIMO system as set forth in claim 41 with said despreading means including a first filter matched to a first chip-sequence signal and a second filter matched to a second chip-sequence signal, for detecting the first spread-spectrum signal and the second spread-spectrum signal as the first plurality of detected spread-spectrum signals and the second plurality of detected spread-spectrum signals, respectively.
94. The MIMO system as set forth in claim 42 with said despreading means including a third filter matched to a third chip-sequence signal, for detecting the third spread-spectrum signal as the third plurality of detected spread-spectrum signals, respectively.
95. The MIMO system as set forth in claim 43 with said despreading means including a fourth filter matched to a fourth chip-sequence signal, for detecting the fourth spread-spectrum signal as the fourth plurality of detected spread-spectrum signals, respectively.
96. The MIMO system as set forth in claim 44 with said despreading means including a fifth filter matched to a fifth chip-sequence signal, for detecting the fifth spread-spectrum signal as the fifth plurality of detected spread-spectrum signals, respectively.