Method and system for single weight (SW) antenna system for single channel (SC) MIMO system for WCDMA

• US 20060072513A1
• Filed: 06/30/2005
• Published: 04/06/2006
• Est. Priority Date: 10/06/2004
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Kent, Mark, van Rooyen, Pieter, Landau, Uri, Erceq, Vinko
• Granted Patent: US 7,991,361 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04B 7/0615 of weighted versions of same signal

Abstract

Methods and systems for processing signals in a receiver are disclosed herein and may comprise receiving WCDMA signals via M receive antennas, tracking a plurality of received clusters within the received WCDMA signals, and estimating a complex phase and amplitude of a portion of each of the received clusters. A single cluster may comprise an aggregate of received WCDMA signal paths and (M-1) phase shifters may be utilized for the estimating of the complex phase. Complex waveforms, comprising in-phase (I) and quadrature (Q) components for the received clusters within the received WCDMA signals, may be processed. The processed complex waveforms comprising the in-phase and quadrature components may be filtered to a WCDMA baseband bandwidth. A phase and/or amplitude for at least one of the received WCDMA signals may be adjusted utilizing the estimated complex phase and amplitude. The phase and/or amplitude may be adjusted continuously and/or at discrete intervals.

Claims

1. A method for processing signals in a receiver, the method comprising:

receiving WCDMA signals via M receive antennas;

tracking a plurality of received clusters within said received WCDMA signals; and

estimating a complex phase and amplitude of at least a portion of each of said plurality of received clusters, wherein a single cluster comprises an aggregate of received WCDMA signal paths, and wherein (M-1) phase shifters are utilized for said estimating of said complex phase.

2. The method according to claim 1, further comprising processing complex waveforms comprising in-phase (I) and quadrature (Q) components for said plurality of received clusters within said received WCDMA signals.

3. The method according to claim 2, further comprising filtering said processed complex waveforms comprising said in-phase and quadrature components to a WCDMA baseband bandwidth.

4. The method according to claim 1, further comprising adjusting at least one of a phase and amplitude for at least one of said received WCDMA signals utilizing said estimated complex phase and amplitude.

5. The method according to claim 4, wherein said at least one of said phase and amplitude is adjusted continuously.

6. The method according to claim 4, wherein said at least one of said phase and amplitude is adjusted at discrete intervals.

7. The method according to claim 1, wherein said plurality of received clusters within said WCDMA signals is transmitted via at least one antenna from at least one base transmit station.

8. The method according to claim 1, further comprising generating at least one channel estimate of a time varying impulse response for at least one of said plurality of received clusters within said received WCDMA signals.

9. The method according to claim 8, further comprising generating at least one transmit control signal utilizing said generated at least one channel estimate of said time varying impulse response, wherein said generated at least one transmit control signal is utilized for at least one of phase and amplitude adjustment of said received WCDMA signals or subsequently received WCDMA signals.

10. The method according to claim 9, wherein said at least one transmit control signal is generated via a single weight generator.

11. A machine-readable storage having stored thereon, a computer program having at least one code section for processing signals in a receiver, the at least one code section being executable by a machine for causing the machine to perform steps comprising:

receiving WCDMA signals via M receive antennas;

tracking a plurality of received clusters within said received WCDMA signals; and

estimating a complex phase and amplitude of at least a portion of each of said plurality of received clusters, wherein a single cluster comprises an aggregate of received WCDMA signal paths, and wherein (M-1) phase shifters are utilized for said estimating of said complex phase.

12. The machine-readable storage according to claim 11, further comprising code for processing complex waveforms comprising in-phase (I) and quadrature (Q) components for said plurality of received clusters within said received WCDMA signals.

13. The machine-readable storage according to claim 12, further comprising code for filtering said processed complex waveforms comprising said in-phase and quadrature components to a WCDMA baseband bandwidth.

14. The machine-readable storage according to claim 11, further comprising code for adjusting at least one of a phase and amplitude for at least one of said received WCDMA signals utilizing said estimated complex phase and amplitude.

15. The machine-readable storage according to claim 14, wherein said at least one of said phase and amplitude is adjusted continuously.

16. The machine-readable storage according to claim 14, wherein said at least one of said phase and amplitude is adjusted at discrete intervals.

17. The machine-readable storage according to claim 11, wherein said plurality of received clusters within said WCDMA signals is transmitted via at least one antenna from at least one base transmit station.

18. The machine-readable storage according to claim 11, further comprising code for generating at least one channel estimate of a time varying impulse response for at least one of said plurality of received clusters within said received WCDMA signals.

19. The machine-readable storage according to claim 18, further comprising code for generating at least one transmit control signal utilizing said generated at least one channel estimate of said time varying impulse response, wherein said generated at least one transmit control signal is utilized for at least one of phase and amplitude adjustment of said received WCDMA signals or subsequently received WCDMA signals.

20. The machine-readable storage according to claim 19, wherein said at least one transmit control signal is generated via a single weight generator.

21. A system for processing signals in a receiver, the system comprising:

a plurality of M receive antennas that receive WCDMA signals;

a channel estimator that tracks a plurality of received clusters within said received WCDMA signals; and

said channel estimator estimates a complex phase and amplitude of at least a portion of each of said plurality of received clusters, wherein a single cluster comprises an aggregate of received WCDMA signal paths, and wherein (M-1) phase shifters are utilized for said estimating of said complex phase.

22. The system according to claim 21, further comprising a filter that processes complex waveforms comprising in-phase (I) and quadrature (Q) components for said plurality of received clusters within said received WCDMA signals.

23. The system according to claim 22, wherein said filter filters said processed complex waveforms comprising said in-phase and quadrature components to a WCDMA baseband bandwidth.

24. The system according to claim 21, further comprising at least one processor that adjusts at least one of a phase and amplitude for at least one of said received WCDMA signals utilizing said estimated complex phase and amplitude.

25. The system according to claim 24, wherein said at least one of said phase and amplitude is adjusted continuously.

26. The system according to claim 24, wherein said at least one of said phase and amplitude is adjusted at discrete intervals.

27. The system according to claim 21, wherein said plurality of received clusters within said WCDMA signals is transmitted via at least one antenna from at least one base transmit station.

28. The system according to claim 21, further comprising a channel estimator that generates at least one channel estimate of a time varying impulse response for at least one of said plurality of received clusters within said received WCDMA signals.

29. The system according to claim 28, wherein said channel estimator generates at least one transmit control signal utilizing said generated at least one channel estimate of said time varying impulse response, wherein said generated at least one transmit control signal is utilized for at least one of phase and amplitude adjustment of said received WCDMA signals or subsequently received WCDMA signals.

30. The system according to claim 29, wherein said at least one transmit control signal is generated via a single weight generator.