Method and system for implementing a single weight (SW) single channel (SC) MIMO system with no insertion loss

• US 20060072629A1
• 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, Landau, Uri M., Erceg, Vinko, Rooyen, Pieter Van
• Granted Patent: US 8,098,683 B2
• Time in Patent Office: Days
• US Class Current: 370/516
• CPC Class Codes: H04B 7/0848 Joint weighting
• CPC Class Codes: H04L 25/03019 adaptive, i.e. capable of adjustment during data reception
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

In a RF communications system, aspects for implementing a single weight single channel MIMO system with no insertion loss may comprise generating at least one control signal that is utilized to control at least one of a plurality of received signals in a WCDMA and/or HSDPA system. A phase of a first of the plurality of received signals may be adjusted outside of a first processing path used to process that signal so that it is equivalent to a phase of at least a second of the plurality of received signals. A gain in the first processing path may be equivalent to a gain in a second processing path that is utilized to process the second of the plurality of received signals. The control signal may be utilized to adjust a phase and/or an amplitude of at least one of a plurality of received signals.

Claims

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

generating at least one control signal that is utilized to control at least one of a plurality of received signals; and

adjusting a phase of a first of said plurality of received signals outside of a first processing path that is utilized to process said first of said plurality of received signals so that it is equivalent to a phase of at least a second of said plurality of received signals, wherein a gain in said first processing path is equivalent to a gain in a second processing path that is utilized to process said second of said plurality of received signals.

2. The method according to claim 1, wherein said at least one control signal is utilized to control said at least one of a plurality of received signals in a WCDMA system.

3. The method according to claim 1, wherein said at least one control signal is utilized to control said at least one of a plurality of received signals in a HSDPA system.

4. The method according to claim 1, wherein said at least one control signal comprises information utilized to adjust at least one of:

a phase and an amplitude of said at least one of a plurality of received signals.

5. The method according to claim 1, further comprising generating said at least one control signal utilizing at least one optimization algorithm comprising at least one of a maximum signal-to-noise ratio (SNR) algorithm, a maximum signal-to-interference-and-noise ratio (SINR) algorithm, and a minimum bit error rate (BER) algorithm.

6. The method according to claim 1, further comprising adjusting a phase of a local oscillator signal.

7. The method according to claim 6, further comprising adjusting a gain of said local oscillator signal for gain balance between said local oscillator signal and said first of said plurality of received signals.

8. The method according to claim 1, further comprising adjusting said phase of said first of said plurality of received signals continuously.

9. The method according to claim 1, further comprising adjusting said phase of said first of said plurality of received signals discretely.

10. The method according to claim 1, further comprising combining at least said first of said plurality of received signals having said adjusted phase with said at least said second of said plurality of received signals to create combined signals, wherein said adjusting said phase increases signal to noise ratio of said combined signals.

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

a single weight generator that generates at least one control signal that is utilized to control at least one of a plurality of received signals; and

a phase shifter that adjusts a phase of a first of said plurality of received signals outside of a first processing path that is utilized to process said first of said plurality of received signals so that it is equivalent to a phase of at least a second of said plurality of received signals, wherein a gain in said first processing path is equivalent to a gain in a second processing path that is utilized to process said second of said plurality of received signals.

12. The system according to claim 11, wherein said phase shifter utilizes said at least one control signal to control said at least one of a plurality of received signals in a WCDMA system.

13. The system according to claim 11, wherein said phase shifter utilizes said at least one control signal to control said at least one of a plurality of received signals in a HSDPA system.

14. The system according to claim 11, wherein said phase shifter utilizes information in said at least one control signal to adjust at least one of:

a phase and an amplitude of said at least one of a plurality of received signals.

15. The system according to claim 11, wherein said single weight generator utilizes at least one optimization algorithm comprising at least one of a maximum signal-to-noise ratio (SNR) algorithm, a maximum signal-to-interference-and-noise ratio (SINR) algorithm, and a minimum bit error rate (BER) algorithm to generate said at least one control signal.

16. The system according to claim 11, wherein said phase shifter adjusts a phase of a local oscillator signal.

17. The system according to claim 16, wherein said phase shifter adjusts a gain of said local oscillator signal for gain balance between said local oscillator signal and said first of said plurality of received signals.

18. The system according to claim 11, further comprising circuitry that adjusts of said phase of said first of said plurality of received signals continuously.

19. The system according to claim 11, further comprising circuitry that adjusts said phase of said first of said plurality of received signals discretely.

20. The system according to claim 11, further comprising circuitry that combines at least said first of said plurality of received signals having said adjusted phase with said at least said second of said plurality of received signals to create combined signals, wherein said adjusting phase increases signal to noise ratio of said combined signals.

21. A machine-readable storage having stored thereupon, 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:

generating at least one control signal that is utilized to control at least one of a plurality of received signals; and

adjusting a phase of a first of said plurality of received signals outside of a first processing path that is utilized to process said first of said plurality of received signals so that it is equivalent to a phase of at least a second of said plurality of received signals, wherein a gain in said first processing path is equivalent to a gain in a second processing path that is utilized to process said second of said plurality of received signals.

22. The machine-readable storage according to claim 21, further comprising code for controlling said at least one of a plurality of received signals in a WCDMA system via said at least one control signal.

23. The machine-readable storage according to claim 21, further comprising code for controlling said at least one of a plurality of received signals in a HSDPA system via said at least one control signal.

24. The machine-readable storage according to claim 21, further comprising code for adjusting, via information in said at least one control signal, at least one of:

a phase and an amplitude of said at least one of a plurality of received signals.

25. The machine-readable storage according to claim 21, further comprising code for generating said at least one control signal utilizing at least one optimization algorithm comprising at least one of a maximum signal-to-noise ratio (SNR) algorithm, a maximum signal-to-interference-and-noise ratio (SINR) algorithm, and a minimum bit error rate (BER) algorithm.

26. The machine-readable storage according to claim 21, further comprising code for adjusting a phase of a local oscillator signal.

27. The machine-readable storage according to claim 26, further comprising code for adjusting a gain of said local oscillator signal for gain balance between said local oscillator signal and said first of said plurality of received signals.

28. The machine-readable storage according to claim 21, further comprising code for adjusting said phase of said first of said plurality of received signals continuously.

29. The machine-readable storage according to claim 21, further comprising code for adjusting said phase of said first of said plurality of received signals discretely.

30. The machine-readable storage according to claim 21, further comprising code for combining at least said first of said plurality of received signals having said adjusted phase with said at least said second of said plurality of received signals to create combined signals, wherein said adjusting said phase increases signal to noise ratio of said combined signals.