Method and system for frame formats for MIMO channel measurement exchange
View Patent ↗A method and system for frame formats for MIMO channel measurement exchange is provided. Aspects of a method for communicating information in a communication system may comprise transmitting data via a plurality of radio frequency (RF) channels utilizing a plurality of transmitting antenna, receiving feedback information via at least one of a plurality of RF channels, and modifying a transmission mode based on the feedback information. Aspects of a method for communicating information in a communication system may also comprise receiving data via a plurality of receiving antenna, transmitting feedback information via at least one of the plurality of RF channels, and requesting modification of a transmission mode for the received data in transmitted response messages comprising the feedback information.
1. A method for communication, the method comprising:
computing a plurality of channel estimate matrices based on signals received by a mobile terminal from a base station, via one or more downlink RF channels, wherein said plurality of channel estimate matrices comprise coefficients derived from performing a singular value matrix decomposition (SVD) on said received signals; and
transmitting said coefficients as feedback information to said base station, via one or more uplink RF channels.
2. The method according to claim 1 , comprising computing each of said plurality of channel estimate matrices for a corresponding one of a plurality of tones, wherein each of said plurality of tones corresponds to one or more distinct frequencies.
3. The method according to claim 2 , comprising computing one or both of, a right singular vector matrix and a singular value matrix, corresponding to each of said plurality of channel estimate matrices.
4. The method according to claim 3 , comprising computing an average singular value matrix based on an average of a plurality of said computed singular value matrices, wherein said average of said plurality of said computed singular value matrices is computed based on said plurality of tones.
5. The method according to claim 4 , comprising communicating said computed average singular value matrix via said transmitted feedback information.
6. The method according to claim 5 , wherein said computed average singular value matrix comprises a matrix rank, which is equal to the number of nonzero singular values in said computed average singular value matrix.
7. The method according to claim 6 , wherein each of said nonzero singular values in said computed average singular value matrix comprises a determined number of bits.
8. The method according to claim 3 , comprising computing said coefficients based on an average of a plurality of said computed right singular vector matrices, wherein each of said coefficients is computed based on a corresponding distinct at least a portion of said plurality of tones.
9. The method according to claim 8 , wherein each value in said coefficients comprises a corresponding magnitude value and phase value.
10. The method according to claim 9 , wherein each of said corresponding magnitude value comprises a determined number of bits, and each of said corresponding phase value comprises a separately determined number of bits.
11. A system for communication, the system comprising:
one or more circuits of a mobile terminal that are operable to compute a plurality of channel estimate matrices based on signals received by said mobile terminal from a base station, via one or more downlink RF channels, wherein said plurality of channel estimate matrices comprise coefficients derived from performing a singular value matrix decomposition (SVD) on said received signals; and
said one or more circuits are operable to transmit said coefficients as feedback information to said base station, via one or more uplink RF channels.
12. The system according to claim 11 , wherein said one or more circuits are operable to compute each of said plurality of channel estimate matrices for a corresponding one of a plurality of tones, wherein each of said plurality of tones corresponds to one or more distinct frequencies.
13. The system according to claim 12 , wherein said one or more circuits are operable to compute one or both of, a right singular vector matrix and a singular value matrix, corresponding to each of said plurality of channel estimate matrices.
14. The system according to claim 13 , wherein said one or more circuits are operable to compute an average singular value matrix based on an average of a plurality of said computed singular value matrices, wherein said average of said plurality of said computed singular value matrices is computed based on said plurality of tones.
15. The system according to claim 14 , wherein said one or more circuits are operable to communicate said computed average singular value matrix via said transmitted feedback information.
16. The system according to claim 15 , wherein said computed average singular value matrix comprises a matrix rank, which is equal to the number of nonzero singular values in said computed average singular value matrix.
17. The system according to claim 16 , wherein each of said nonzero singular values in said computed average singular value matrix comprises a determined number of bits.
18. The system according to claim 13 , wherein said one or more circuits are operable to compute said coefficients based on an average of a plurality of said computed right singular vector matrices, wherein each of said coefficients is computed based on a corresponding distinct at least a portion of said plurality of tones.
19. The system according to claim 18 , wherein each value in said coefficients comprises a corresponding magnitude value and phase value.
20. The system according to claim 19 , wherein each of said corresponding magnitude value comprises a determined number of bits, and each of said corresponding phase value comprises a separately determined number of bits.
21. A method for communication, the method comprising:
computing a plurality of channel estimates based on signals received by a mobile terminal from a base station, via one or more downlink RF channels;
deriving a matrix based on the plurality of channel estimates, wherein the matrix comprises coefficients from performing a singular value matrix decomposition (SVD) on said plurality of channel estimates; and
transmitting the coefficients as feedback information to said base station, via one or more uplink RF channels.
22. A system for communication, the system comprising:
one or more circuits of a mobile terminal that are operable to compute a plurality of channel estimates based on signals received by said mobile terminal from a base station, via one or more downlink RF channels;
said one or more circuits are operable to derive a matrix based on said plurality of channel estimates, wherein said matrix comprises coefficients derived from performing a singular value matrix decomposition (SVD) on said plurality of channel estimates; and
said one or more circuits are operable to transmit said coefficients as feedback information to said base station, via one or more uplink RF channels.