Method and system for low complexity conjugate gradient based equalization in a wireless system
View Patent ↗Methods and systems for processing signals in a receiver are disclosed herein and may include updating a plurality of filter taps utilizing at least one channel response vector and at least one correlation vector, for a plurality of received clusters, based on initialized values related to the at least one channel response vector and the at least one correlation vector. At least a portion of the received signal clusters may be filtered utilizing at least a portion of the updated plurality of filter taps. The update may be repeated whenever a specified signal-to-noise ratio (SNR) for the received signal clusters is reached. The initialized values may be updated during a plurality of iterations, and the update may be repeated whenever a specified number of the plurality of iterations is reached.
1. A method for processing wireless signals, the method comprising:
receiving a plurality of wireless signals via a plurality of receive antennas, wherein the plurality of wireless signals comprise information transmitted from a plurality of transmit antennas;
generating a plurality of equalizer taps according to a plurality of channel response vectors that correspond to combinations of one receive antenna and one transmit antenna;
generating a plurality of correlation vectors that correspond to combinations of a first wireless signal of the plurality of wireless signals correlated with a complex conjugate of a second wireless signal of the plurality of wireless signals; and
updating the plurality of equalizer taps according to at least one correlation vector when a signal-to-noise ratio (SNR) requirement is satisfied.
2. The method according to claim 1 , wherein the method comprises iteratively updating while the SNR requirement is satisfied.
3. The method according to claim 1 , wherein the method comprises updating if a specified number of iterations is reached.
4. The method according to claim 1 , wherein the method comprises generating a plurality of chip-rate synchronously sampled signals utilizing the plurality of wireless signals.
5. The method according to claim 4 , wherein the method comprises generating the plurality of chip-rate synchronously sampled signals utilizing a chip clocking signal.
6. The method according to claim 4 , wherein the method comprises generating the plurality of correlation vectors utilizing the plurality of chip-rate synchronously sampled signals.
7. The method according to claim 1 , wherein the method comprises updating the plurality of equalizer taps according to a conjugate gradient based on the at least one correlation vector.
8. The method according to claim 1 , wherein a cluster corresponds to the information transmitted from a transmit antenna.
9. A system for processing wireless signals, the system comprising:
one or more processors operable to:
receive a plurality of wireless signals via a plurality of receive antennas, wherein the plurality of wireless signals comprise information transmitted from a plurality of transmit antennas;
generate a plurality of equalizer taps according to a plurality of channel response vectors that correspond to combinations of one receive antenna and one transmit antenna;
generate a plurality of correlation vectors that correspond to combinations of a first wireless signal of the, plurality of wireless, signals correlated with a complex conjugate of a second wireless signal of the plurality of wireless signals; and
update the plurality of equalizer taps according to at least one correlation vector when a signal-to-noise ratio (SNR) requirement is satisfied.
10. The system according to claim 9 , wherein the one or more processors are operable to iteratively update while the SNR requirement is satisfied.
11. The system according to claim 9 , wherein the one or more processors are operable to update if a specified number of iterations is reached.
12. The system according to claim 9 , wherein the one or more processors are operable to generate a plurality of chip-rate synchronously sampled signals utilizing the plurality of wireless signals.
13. The system according to claim 12 , wherein the one or more processors are operable to generate the plurality of chip-rate synchronously sampled signals utilizing a chip clocking signal.
14. The system according to claim 12 , wherein the one or more processors are operable to generate the plurality of correlation vectors utilizing the plurality of chip-rate synchronously sampled signals.
15. The system according to claim 9 , wherein the one or more processors are operable to update the plurality of equalizer taps according to a conjugate gradient based on the at least one correlation vector.
16. The system according to claim 9 , wherein the one or more processors comprise a cluster processor operable to process an information signal transmitted from one or more transmit antennas.