Systems/methods of carrier aggregation
Various embodiments of carrier aggregation are provided that increase communications capacity and throughput. According to some embodiments, a receiver may be configured with a plurality of receiver chains and, responsive to an aggregate bandwidth of an overall signal that is to be received by the receiver, a plurality of components of the overall signal, each comprising a bandwidth that is less than a frequency span of the overall signal, are received by a respective plurality of receiver chains. Accordingly, each component of the plurality of components of the overall signal may be received by a respective receiver chain of the plurality of receiver chains of the receiver thus avoiding bandwidth limitations associated with receiver elements.
1. A communications method comprising:
receiving by a receiver a plurality of components of an overall signal; each component of the plurality of components comprising a characteristic value that is less than a corresponding characteristic value of the overall signal, wherein the characteristic value comprises a bandwidth;
configuring the receiver with a plurality of elements corresponding to the plurality of components of the overall signal;
receiving the overall signal by receiving by the receiver the plurality of components of the overall signal using the corresponding plurality of elements;
identifying that the overall signal to be received will exceed a limit associated with a subsystem of the receiver;
preventing the limit from being exceeded by refraining from receiving the overall signal via said subsystem of the receiver; and
receiving the plurality of components of the overall signal via the corresponding plurality of elements of the receiver.
2. The communications method according to claim 1 , wherein the subsystem of the receiver comprises an antenna.
3. The communications method according to claim 1 , wherein the limit is a bandwidth limit.
4. The communications method according to claim 1 , wherein the subsystem of the receiver comprises an element of the receiver other than an antenna.
5. The communications method according to claim 1 , wherein said overall signal comprises first and second frequency segments that are separated from one another by a frequency interval over which the overall signal is substantially devoid of frequency content.
6. The communications method according to claim 5 , wherein the first and second frequency segments comprise an aggregate bandwidth of 100 MHz; the first frequency segment comprises a bandwidth of 40 MHz; and the second frequency segment comprises a bandwidth of 60 MHz.
7. The communications method according to claim 1 , wherein said characteristic value further comprises a number of points of a Discrete Fourier Transform and/or a number of points of an Inverse Discrete Fourier transform.
8. The communications method according to claim 1 , wherein a first and a second element of the plurality of elements comprise respective first and second antennas, first and second amplifiers, first and second Discrete Fourier Transforms and/or first and second Inverse Discrete Fourier transforms.
9. The communications method according to claim 8 ,
wherein said configuring the receiver with a plurality of elements corresponding to the plurality of components of the overall signal comprises:
configuring the receiver with the first and second antennas, the first and second amplifiers, the first and second Discrete Fourier Transforms and/or the first and second Inverse Discrete Fourier transforms; and
wherein said receiving the overall signal by receiving by the receiver the plurality of components of the overall signal by using the corresponding plurality of elements comprises:
receiving a first component of the plurality of components by using the first antenna, the first amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and
receiving a second component of the plurality of components by using the second antenna, the second amplifier, the second Discrete Fourier transform and/or the second Inverse Discrete Fourier Transform.
10. The communications method according to claim 1 , further comprising:
forming a matrix; and
processing the plurality of components by using the matrix.
11. The communications method according to claim 10 , wherein the matrix comprises channel information.
12. The communications method according to claim 11 , further comprising:
forming first and second matrices comprising respective first and second channel information;
processing a first component of the plurality of components by using the first matrix; and
processing a second component of the plurality of components by using the second matrix.
13. A communications system comprising:
a receiver comprising a plurality of elements corresponding to a plurality of components of an overall signal that is to be received by the receiver; each component of said plurality of components comprising a characteristic value that is less than a corresponding characteristic value of the overall signal, wherein the characteristic value comprises a bandwidth;
and a processor that is configured to:
receive the overall signal by processing the plurality of components of the overall signal via a respective plurality of elements;
identify that the overall signal to be received will exceed a limit associated with a subsystem of the receiver;
prevent the limit from being exceeded by refraining from processing the overall signal via said subsystem of the receiver;
and process the plurality of components via the respective plurality of elements of the receiver, thus receiving the overall signal.
14. The communications system according to claim 13 , wherein the subsystem of the receiver comprises an antenna.
15. The communications system according to claim 13 , wherein the limit is a bandwidth limit.
16. The communications system according to claim 13 , wherein the subsystem of the receiver comprises an element of the receiver other than an antenna.
17. The communications system according to claim 13 , wherein said overall signal comprises first and second frequency segments that are separated from one another by a frequency interval over which the overall signal is substantially devoid of frequency content.
18. The communications system according to claim 17 , wherein the first and second frequency segments comprise an aggregate bandwidth of 100 MHz; the first frequency segment comprises a bandwidth of 40 MHz; and the second frequency segment comprises a bandwidth of 60 MHz.
19. The communications system according to claim 13 , wherein said characteristic value further comprises a number of points of a Discrete Fourier Transform and/or a number of points of an Inverse Discrete Fourier transform.
20. The communications system according to claim 13 , wherein a first and second element of the plurality of elements comprise respective first and second antennas, first and second amplifiers, first and second Discrete Fourier Transforms and/or first and second Inverse Discrete Fourier transforms.
21. The communications system according to claim 20 , wherein the receiver comprises the first and second antennas, the first and second amplifiers, the first and second Discrete Fourier Transforms and/or the first and second Inverse Discrete Fourier transforms; and wherein the processor is further configured to receive a first component of the plurality of components by using the first antenna, the first amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and to receive a second component of the plurality of components by using the second antenna, the second amplifier, the second Discrete Fourier transform and/or the second Inverse Discrete Fourier Transform.
22. The communications system according to claim 13 , wherein the processor is further configured to:
form a matrix; and
process the plurality of components by using the matrix.
23. The communications system according to claim 22 , wherein said matrix comprises channel information; and wherein the processor is further configured to multiply the plurality of components by said matrix.
24. The communications system according to claim 22 , wherein the processor is further configured to:
form first and second matrices;
process a first component of the plurality of components by using the first matrix; and
process a second component of the plurality of components by using the second matrix.
25. The communications system according to claim 13 , further comprising a base station that is configured to:
receive information from a first terminal of a plurality of terminals and from a second terminal of the plurality of terminals; said plurality of terminals being within a service area of a sector of the base station;
determine, based on the received information, that the first terminal and the second terminal are sufficiently spaced apart from one another; and
provide communications to said first terminal and to said second terminal simultaneously and co-channel by using a multi-element antenna to form respective first and second antenna patterns that discriminate spatially, responsive to having determined that said first terminal and said second terminal are sufficiently spaced apart from one another.
26. A communications method comprising:
configuring a plurality of receiver chains;
receiving an overall signal by a receiver from a transmitter by using a first receiver chain of the plurality of receiver chains and a second receiver chain of the plurality of receiver chains to receive respective first and second different components of the overall signal over respective first and second mutually exclusive frequencies from the transmitter;
identifying that the overall signal to be received will exceed a limit associated with a subsystem of the receiver;
preventing the limit from being exceeded by refraining from receiving the overall signal via said subsystem of the receiver;
and receiving a plurality of components of the overall signal via the plurality of receiver chains thus receiving the overall signal and avoiding said exceeding.
27. The communications method according to claim 26 , wherein the subsystem of the receiver comprises an antenna.
28. The communications method according to claim 26 , wherein the limit is a bandwidth limit.
29. The communications method according to claim 26 , wherein the subsystem of the receiver comprises an element of the receiver other than an antenna.
30. The communications method according to claim 26 , wherein said overall signal comprises first and second frequency intervals over which the overall signal comprises frequency content; and wherein the first and second frequency intervals are separated from one another by a third frequency interval over which the overall signal is substantially devoid of frequency content.
31. The communications method according to claim 30 , wherein the first and second frequency intervals comprise an aggregate bandwidth of 100 MHz; the first frequency interval comprises a bandwidth of 40 MHz; and the second frequency interval comprises a bandwidth of 60 MHz.
32. The communications method according to claim 26 , wherein said first and second different components of the overall signal comprise respective first and second different frequency content, respective first and second different bandwidths and/or respective first and second different subcarriers.
33. The communications method according to claim 26 , wherein said first receiver chain of the plurality of receiver chains and said second receiver chain of the plurality of receiver chains comprise respective first and second different elements.
34. The communications method according to claim 33 , wherein the respective first and second different elements comprise respective first and second different antennas, respective first and second different amplifiers, respective first and second different Discrete Fourier Transforms and/or respective first and second different Inverse Discrete Fourier transforms.
35. The communications method according to claim 34 ,
wherein said configuring a plurality of receiver chains comprises:
providing the receiver with the first and second antennas, the first and second amplifiers, the first and second Discrete Fourier Transforms and/or the first and second Inverse Discrete Fourier transforms; and
wherein said receiving an overall signal by a receiver by using a first receiver chain of the plurality of receiver chains and a second receiver chain of the plurality of receiver chains to receive respective first and second different components of the overall signal over respective first and second mutually exclusive frequencies comprises:
receiving the first component of the overall signal by using the first antenna, the first amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and
receiving the second component of the overall signal by using the second antenna, the second amplifier, the second Discrete Fourier transform and/or the second Inverse Discrete Fourier Transform.
36. The communications method according to claim 26 , further comprising:
forming a matrix; and
processing the first and second different components of the overall signal by using the matrix.
37. The communications method according to claim 36 , wherein forming a matrix comprises using channel information; and wherein said processing the first and second different components of the overall signal by using the matrix comprises multiplying the first and second different components of the overall signal by the matrix.
38. The communications method according to claim 26 , wherein said configuring a plurality of transmitter chains comprises:
using an antenna by the first receiver chain of the plurality of receiver chains and also using the antenna by the second receiver chain of the plurality of receiver chains.
39. A communications system comprising:
a receiver that comprises a plurality of receiver chains and a processor that is configured to perform operations comprising:
receiving an overall signal from a transmitter by using a first receiver chain of the plurality of receiver chains and a second receiver chain of the plurality of receiver chains to receive respective first and second different components of the overall signal over respective first and second mutually exclusive frequencies from the transmitter;
identifying that the overall signal to be received will exceed a limit associated with a subsystem of the receiver;
preventing the limit from being exceeded by refraining from processing the overall signal by said subsystem of the receiver; and
processing a plurality of components of the overall signal by the plurality of receiver chains.
40. The communications system according to claim 39 , wherein the subsystem of the receiver comprises an antenna.
41. The communications system according to claim 39 , wherein the limit is a bandwidth limit.
42. The communications system according to claim 39 , wherein the subsystem of the receiver comprises an element of the receiver other than an antenna.
43. The communications system according to claim 39 , wherein said overall signal comprises first and second frequency intervals over which the overall signal comprises frequency content; and wherein the first and second frequency intervals are separated from one another by a third frequency interval over which the overall signal is substantially devoid of frequency content.
44. The communications system according to claim 43 , wherein the first and second frequency intervals comprise an aggregate bandwidth of 100MHz; the first frequency interval comprises a bandwidth of 40 MHz; and the second frequency interval comprises a bandwidth of 60 MHz.
45. The communications system according to claim 39 , wherein said first and second different components of the overall signal comprise respective first and second different frequency content, respective first and second different bandwidths and/or respective first and second different subcarriers.
46. The communications system according to claim 39 , wherein said first receiver chain of the plurality of receiver chains and said second receiver chain of the plurality of receiver chains comprise respective first and second different elements.
47. The communications system according to claim 46 , wherein the respective first and second different elements comprise respective first and second different antennas, respective first and second different amplifiers, respective first and second different Discrete Fourier Transforms and/or respective first and second different Inverse Discrete Fourier transforms.
48. The communications system according to claim 47 , wherein the operations further comprise:
receiving the first component of the overall signal by using the first antenna, the first amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and
receiving the second component of the overall signal by using the second antenna, the second amplifier, the second Discrete Fourier transform and/or the second Inverse Discrete Fourier Transform.
49. The communications system according to claim 39 , wherein the operations further comprise:
forming a matrix; and
processing the first and second different components of the overall signal by using the matrix.
50. The communications system according to claim 49 , wherein said matrix comprises channel information.
51. The communications system according to claim 39 , wherein the first receiver chain of the plurality of receiver chains and the second receiver chain of the plurality of receiver chains share a common antenna.
52. The communications system according to claim 39 , wherein said overall signal comprises first and second frequency intervals over which the overall signal comprises frequency content; the first and second frequency intervals are separated from one another by a third frequency interval over which the overall signal is substantially devoid of frequency content; and wherein the first and second frequency intervals comprise an aggregate bandwidth of 100 MHz.
53. The communications system according to claim 52 , wherein the first frequency interval comprises a bandwidth of 40 MHz.
54. The communications system according to claim 53 , wherein the second frequency interval comprises a bandwidth of 60 MHz.
55. The communications system according to claim 52 , wherein the second frequency interval comprises a bandwidth of 60 MHz.
56. The communications system according to claim 55 , wherein the first frequency interval comprises a bandwidth of 40 MHz.
57. The communications system according to claim 39 , further comprising a base station that is configured to:
receive information from a first terminal of a plurality of terminals and from a second terminal of the plurality of terminals; said plurality of terminals being within a service area of a sector of the base station;
determine, based on the received information, that the first terminal and the second terminal are sufficiently spaced apart from one another; and
provide communications to said first terminal and to said second terminal simultaneously and co-channel by using a multi-element antenna to form respective first and second antenna patterns that discriminate spatially, responsive to having determined that said first terminal and said second terminal are sufficiently spaced apart from one another.