Systems/methods of carrier aggregation providing increased capacity communications

• US 8,891,645 B2
• Filed: 02/14/2013
• Issued: 11/18/2014
• Est. Priority Date: 06/22/2005
• Status: Active Grant

• Current Assignee: Odyssey Wireless, Inc.
• Original Assignee: Odyssey Wireless, Inc.
• Inventors: Karabinis, Peter D.
• Primary Examiner(s): Joseph, Jaison
• Application Number:
  US13/767,537
• Publication Number:
  US 20130170569A1
• Time in Patent Office: 642 Days
• Field of Search: 375/260, 375/295, 375/316
• US Class Current: 375/260
• CPC Class Codes: H03F 3/24 of transmitter output stages
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04B 2001/0408 with power amplifiers
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04B 7/0842 Weighted combining
• CPC Class Codes: H04B 7/0885 with combination
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04J 11/0036 at the receiver
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 25/03006 Arrangements for removing intersymbol interference
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2633 using partial FFTs
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/26522 using partial FFTs
• CPC Class Codes: H04L 27/26526 : with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/0007 : the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams

Abstract

Various embodiments of carrier aggregation are provided that increase communications capacity and throughput. Responsive to an aggregate bandwidth of a signal that is to be transmitted exceeding a limit associated with an antenna and/or other element of a transmitter, the signal is decomposed/segmented/divided into a plurality of components each one of which comprises a bandwidth that is smaller than the bandwidth of the signal. Accordingly, the transmitter is configured with a corresponding plurality of antennas and/or corresponding plurality of other elements to transmit the plurality of components. Systems/methods of spatial multiplexing are also provided further increasing network capacity and throughput.

Claims

1. A communications method comprising:

forming a plurality of components of an overall signal that is to be transmitted by a transmitter such that each one of the plurality of components comprises a characteristic value that is less than a corresponding characteristic value associated with the overall signal;

configuring the transmitter with a plurality of elements corresponding to the plurality of components of the overall signal; and

transmitting the overall signal by transmitting by the transmitter the plurality of components of the overall signal by using the corresponding plurality of elements;

wherein the characteristic value comprises a bandwidth.

2. The communications method according to claim 1, further comprising:

exceeding by the overall signal that is to be transmitted by the transmitter a limit associated with a subsystem of the transmitter;

avoiding said exceeding by refraining from transmitting the overall signal via said subsystem of the transmitter; and

transmitting the plurality of components of the overall signal via the corresponding plurality of elements of the transmitter, 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 transmitter comprises an antenna of the transmitter and/or an element of the transmitter other than the antenna.

5. The communications method according to claim 1, wherein said overall signal comprises first and second frequency segments that are separated therebetween by a substantial 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 said plurality of components of the overall signal comprises first and second components and wherein said plurality of elements corresponding to the plurality of components comprises first and second elements.

9. The communications method according to claim 8, wherein the first and second elements comprise first and second antennas, first and second power amplifiers, first and second Discrete Fourier Transforms and/or first and second Inverse Discrete Fourier transforms.

10. The communications method according to claim 9, wherein said configuring the transmitter with a plurality of elements corresponding to the plurality of components of the overall signal comprises:

configuring the 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 the overall signal by transmitting by the transmitter the plurality of components of the overall signal by using the corresponding plurality of elements comprises;

transmitting the first component 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 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:

receiving information-by the transmitter from a receiver;

forming a matrix by the transmitter responsive to said receiving information; and

processing the plurality of components by using the matrix prior to transmitting the plurality of components by the transmitter.

12. The communications method according to claim 11, wherein receiving information comprises receiving channel information;

forming a matrix comprises forming the matrix as a product of first and second matrices responsive to receiving the channel information; and

wherein said processing the plurality of components by using the matrix comprises multiplying the plurality of components by the matrix.

13. The communications method according to claim 11, further comprising:

receiving information by the transmitter from first and second receivers;

forming first and second matrices by the transmitter responsive to said receiving information by the transmitter from the first and second receivers;

processing a first plurality of components by using the first matrix prior to transmitting the first plurality of components by the transmitter; and

processing a second plurality of components by using the second matrix prior to transmitting the second plurality of components by the transmitter.

14. A communications system comprising:

a processor that is configured to form a plurality of components of an overall signal that is to be transmitted such that each one of the plurality of components comprises a characteristic value that is less than a corresponding characteristic value associated with the overall signal; and

a transmitter that is configured with a plurality of elements corresponding to the plurality of components of the overall signal and is further configured to transmit the overall signal by transmitting the plurality of components of the overall signal by using the corresponding plurality of elements;

wherein the characteristic value comprises a bandwidth.

15. The communications system according to claim 14, wherein the processor is further configured to:

recognize that the overall signal that is to be transmitted will exceed a limit associated with a subsystem of the transmitter;

prevent the limit from being exceeded by refraining from sending the overall signal to said subsystem of the transmitter;

form the plurality of components of the overall signal; and

send the plurality of components to the transmitter to be transmitted therefrom via the corresponding plurality of elements of the transmitter, thus transmitting the overall signal.

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 transmitter comprises an antenna of the transmitter and/or an element of the transmitter other than the antenna.

18. The communications system according to claim 14, wherein said overall signal comprises first and second frequency segments that are separated therebetween by a substantial 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 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.

20. The communications system according to claim 14, 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.

21. The communications system according to claim 14, wherein said plurality of components of the overall signal comprises first and second components and wherein said plurality of elements corresponding to the plurality of components comprises first and second elements.

22. The communications system according to claim 21, wherein the first and second elements comprise first and second antennas, first and second power amplifiers, first and second Discrete Fourier Transforms and/or first and second Inverse Discrete Fourier transforms.

23. The communications system according to claim 22, wherein the transmitter is configured 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 the transmitter is further configured to transmit the first component by using the first antenna, the first power amplifier, the first Discrete Fourier transform and/or the first Inverse Discrete Fourier Transform; and

to transmit the second component 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 transmitter is further configured to:

receive information from a receiver;

form a matrix responsive to the received information; and

process the plurality of components by using the matrix prior to transmitting the plurality of components.

25. The-communications system according to claim 24, wherein said information comprises channel information;

said matrix comprises a product of first and second matrices; and

wherein the transmitter is configured to multiply the plurality of components by said matrix.

26. The communications system according to claim 24, wherein the transmitter is further configured to:

receive information from first and second receivers;

form first and second matrices responsive to having received said information from the first and second receivers;

process a first plurality of components by using the first matrix prior to transmitting the first plurality of components; and

process a second plurality of components by using the second matrix prior to transmitting the second plurality of components.

27. The communications system according to claim 14, further comprising a base station that includes the processor, the transmitter, a receiver, a multi-element antenna sub-system and plurality of sectors each one of which is configured to provide communications to a plurality of terminals;

wherein the receiver is configured to receive information from a first terminal and from a second terminal of a plurality of terminals that are within a service area of a sector of the base station and to determine based on the received information that the first terminal and the second terminal of the plurality of terminals that are within the service area of the sector of the base station are sufficiently spaced apart therebetween; and

wherein, responsive to having determined that said first terminal and said second terminal are sufficiently spaced apart therebetween, the base station is configured to provide communications to said first terminal and to said second terminal simultaneously and co-channel therebetween by using the multi-element antenna sub-system to form respective first and second antenna patterns that discriminate spatially therebetween.