Method and system for channel estimation in a single channel MIMO system with multiple RF chains for WCDMA/HSDPA
Aspects of a method and system for channel estimation in a MIMO communication system with multiple RF chains for WCDMA/HSDPA may comprise receiving a plurality of communication signals from a plurality of transmit antennas. A plurality of vectors of baseband combined channel estimates may be generated based on phase rotation of the received plurality of communication signals. A matrix of processed baseband combined channel estimates may be generated based on the generated plurality of vectors of baseband combined channel estimates. A plurality of amplitude and phase correction signals may be generated based on the generated plurality of vectors of baseband combined channel estimates. An amplitude and a phase of at least a portion of the received plurality of communication signals may be adjusted based on the generated plurality of amplitude and phase correction signals, respectively.
1. A method, comprising:
orthogonalizing a received plurality of communication signals by phase rotating the received plurality of communication signals;
generating a plurality of baseband combined channel estimates based on the orthogonalized received plurality of communication signals;
generating a matrix of propagation channel estimates based on the generated plurality of baseband combined channel estimates;
generating a plurality of correction signals based on the matrix of propagation channel estimates; and
adjusting a portion of the received plurality of communication signals based on a portion of the generated plurality of correction signals,
wherein at least one step of the method is performed by at least one hardware device.
2. The method according to claim 1 , further comprising:
receiving the plurality of communication signals from a plurality of transmit antennas.
3. The method according to claim 1 , wherein generating the plurality of correction signals based on the matrix of propagation channel estimates includes using an adaptive algorithm that maximizes a ratio (SINR).
4. The method according to claim 3 , wherein the adaptive algorithm includes a least mean squares algorithm.
5. The method according to claim 1 , wherein generating the plurality of correction signals based on the matrix of propagation channel estimates further includes generating the plurality of correction signals based on a noise power estimate.
6. The method according to claim 1 , wherein the orthogonalizing is performed on a periodic basis.
7. The method according to claim 1 , wherein the orthogonalizing is performed on a continuous basis.
8. The method according to claim 1 , wherein the orthogonalizing includes using square waveforms.
9. The method according to claim 1 , wherein the orthogonalizing includes using triangular waveforms.
10. The method according to claim 1 , wherein generating the matrix of propagation channel estimates based on the generated plurality of baseband combined channel estimates includes using a multiplier and an integrator.
11. A communication system, comprising:
one or more circuits for use in a receiver, the one or more circuits being configured to:
orthogonalize a received plurality of communication signals by phase rotating the received plurality of communication signals;
generate a plurality of baseband combined channel estimates based on the orthogonalized received plurality of communication signals;
generate a matrix of propagation channel estimates based on the generated plurality of baseband combined channel estimates;
generate a plurality of correction signals based on the matrix of propagation channel estimates; and
adjust a portion of the received plurality of communication signals based on a portion of the generated plurality of correction signals.
12. The system according to claim 11 , wherein the one or more circuits are further configured to receive the plurality of communication signals from a plurality of transmit antennas.
13. The system according to claim 11 , wherein the one or more circuits are further configured to generate the plurality of correction signals using an adaptive algorithm that maximizes a signal-to-interference-and-noise-ratio (SINR).
14. The system according to claim 13 , wherein the adaptive algorithm includes a least mean squares algorithm.
15. The system according to claim 11 , wherein the one or more circuits are further configured to generate the plurality of correction signals based on a noise power estimate.
16. The system according to claim 11 , wherein the one or more circuits are further configured to orthogonalize on a periodic basis.
17. The system according to claim 11 , wherein the one or more circuits are further configured to orthogonalize on a continuous basis.
18. The system according to claim 11 , wherein the one or more circuits are further configured to orthogonalize using square waveforms.
19. The system according to claim 11 , wherein the one or more circuits are further configured to orthogonalize using triangular waveforms.
20. The system according to claim 11 , wherein the one or more circuits that are configured to generate the matrix of propagation channel estimates includes a multiplier and an integrator.