Systems/methods of carrier aggregation
Various embodiments of carrier aggregation are provided that increase communications capacity and throughput. According to some embodiments, a transmitter is configured with a plurality of transmitter chains and, responsive to an aggregate bandwidth and/or frequency content of an overall signal that is to be transmitted by the transmitter, the overall signal is segmented into a plurality of components, each one of which comprises a bandwidth that is smaller than the bandwidth of the overall signal, and is thus transmitted by the plurality of transmitter chains of the transmitter. Accordingly, each component of the plurality of components of the overall signal is processed by a respective transmitter chain of the plurality of transmitter chains. Systems/methods of spatial multiplexing are also provided further increasing network capacity and throughput.
1. A communications method comprising:
configuring a plurality of transmitter chains; and
transmitting an overall signal by a mobile transmitter by using a first transmitter chain of the plurality of transmitter chains and a second transmitter chain of the plurality of transmitter chains to transmit respective first and second different components of the overall signal over respective first and second mutually exclusive frequencies.
2. The communications method according to claim 1 , further comprising:
exceeding by the overall signal a limit associated with a subsystem of the mobile transmitter;
refraining from transmitting the overall signal via said subsystem of the mobile transmitter; and
transmitting a plurality of components of the overall signal via the plurality of transmitter chains thus transmitting the overall signal.
3. The communications method according to claim 2 , wherein the limit is a bandwidth limit.
4. The communications method according to claim 2 , wherein the subsystem of the mobile transmitter comprises an antenna and/or an element of the mobile transmitter other than the antenna.
5. The communications method according to claim 1 , 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 therebetween by a third 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 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.
7. The communications method according to claim 1 , 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.
8. The communications method according to claim 1 , wherein said first transmitter chain of the plurality of transmitter chains and said second transmitter chain of the plurality of transmitter chains comprise respective first and second different elements.
9. The communications method according to claim 8 , wherein the respective first and second different elements comprise respective first and second different antennas, respective first and second different power amplifiers, respective first and second different Discrete Fourier Transforms and/or respective first and second different Inverse Discrete Fourier transforms.
10. The communications method according to claim 9 , wherein said configuring a plurality of transmitter chains comprises:
providing the mobile transmitter with the first and second antennas, the first and second power amplifiers, the first and second Discrete Fourier Transforms and/or the first and second Inverse Discrete Fourier transforms; and
wherein said transmitting an overall signal by a mobile transmitter by using a first transmitter chain of the plurality of transmitter chains and a second transmitter chain of the plurality of transmitter chains to transmit respective first and second different components of the overall signal over respective first and second mutually exclusive frequencies comprises:
transmitting the first component of the overall signal by using the first antenna, the first power amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and
transmitting the second component of the overall signal by using the second antenna, the second power amplifier, the second Discrete Fourier transform and/or the second Inverse Discrete Fourier Transform.
11. The communications method according to claim 1 , further comprising:
forming a matrix; and
processing the first and second different components of the overall signal by using the matrix prior to transmitting said first and second different components of the overall signal by the mobile transmitter.
12. The communications method according to claim 11 , wherein forming a matrix comprises forming a product of first and second matrices; and wherein said processing the first and second different components of the overall signal by using the matrix prior to transmitting said first and second different components of the overall signal by the mobile transmitter comprises multiplying the first and second different components of the overall signal by the matrix.
13. The communications method according to claim 1 , wherein said configuring a plurality of transmitter chains comprises:
using an antenna by the first transmitter chain of the plurality of transmitter chains and also using the antenna by the second transmitter chain of the plurality of transmitter chains.
14. A communications system comprising:
a mobile transmitter that comprises a plurality of transmitter chains and a processor that is configured to perform operations comprising:
transmitting an overall signal by using a first transmitter chain of the plurality of transmitter chains and a second transmitter chain of the plurality of transmitter chains to transmit respective first and second different components of the overall signal over respective first and second mutually exclusive frequencies.
15. The communications system according to claim 14 , wherein said operations further comprise:
recognizing that the overall signal exceeds a limit associated with a subsystem of the mobile transmitter;
refraining from processing the overall signal by said subsystem of the transmitter; and
processing a plurality of components of the overall signal by the plurality of transmitter chains.
16. The communications system according to claim 15 , wherein the limit is a bandwidth limit.
17. The communications system according to claim 15 , wherein the subsystem of the mobile transmitter comprises an antenna and/or an element of the mobile transmitter other than the antenna.
18. The communications system according to claim 14 , 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 therebetween by a third frequency interval over which the overall signal is substantially devoid of frequency content.
19. The communications system according to claim 18 , 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.
20. The communications system according to claim 14 , 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.
21. The communications system according to claim 14 , wherein said first transmitter chain of the plurality of transmitter chains and said second transmitter chain of the plurality of transmitter chains comprise respective first and second different elements.
22. The communications system according to claim 21 , wherein the respective first and second different elements comprise respective first and second different antennas, respective first and second different power amplifiers, respective first and second different Discrete Fourier Transforms and/or respective first and second different Inverse Discrete Fourier transforms.
23. The communications system according to claim 22 , wherein the operations further comprise:
transmitting the first component of the overall signal by using the first antenna, the first power amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and
transmitting the second component of the overall signal by using the second antenna, the second power amplifier, the second Discrete Fourier transform and/or the second Inverse Discrete Fourier Transform.
24. The communications system according to claim 14 , wherein the operations further comprise:
forming a matrix; and
processing the first and second different components of the overall signal by using the matrix prior to said transmitting.
25. The communications system according to claim 24 , wherein said matrix comprises a product of first and second matrices.
26. The communications system according to claim 14 , wherein the first transmitter chain of the plurality of transmitter chains and the second transmitter chain of the plurality of transmitter chains share a common antenna.
27. The communications system according to claim 14 , 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 therebetween 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.
28. The communications system according to claim 27 , wherein the first frequency interval comprises a bandwidth of 40 MHz.
29. The communications system according to claim 28 , wherein the second frequency interval comprises a bandwidth of 60 MHz.
30. The communications system according to claim 27 , wherein the second frequency interval comprises a bandwidth of 60 MHz.
31. The communications system according to claim 30 , wherein the first frequency interval comprises a bandwidth of 40 MHz.