Method And System For Communicating Via A Spatial Multilink Repeater

• US 20090278596A1
• Filed: 05/07/2008
• Published: 11/12/2009
• Est. Priority Date: 05/07/2008
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Maryam, Rofougaran, Ahmadreza
• Granted Patent: US 8,325,785 B2
• Time in Patent Office: Days
• US Class Current: 329/302
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04L 27/10 Frequency-modulated carrier systems, i.e. using frequency-shift keying H04L27/32 takes precedence

Abstract

Aspects of a method and system for communicating via a spatial multilink repeater are provided. In this regard, a received signal may be frequency shifted to generate a plurality of repeated signals, wherein each repeated signal may be shifted by a different frequency with respect to the received signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal.

Claims

1. A method for signal processing, the method comprising:

frequency shifting a received signal by a different amount to generate each of a plurality of repeated signals, wherein each of said plurality of repeated signals comprises one or more signal components; and

controlling a phase and/or amplitude of each of said one or more signal components to control a directivity of each of said repeated signals.

2. The method according to claim 1, comprising generating each of said plurality of repeated signals by:

quadrature down-converting said received signal by mixing said received signal with a first of a plurality of phase-quadrature local oscillator signal pairs;

up-converting said down-converted signal by mixing said down-converted signal with a second of said phase-quadrature local oscillator signal pairs; and

adding or subtracting an in-phase portion of said up-converted signal and a quadrature-phase portion of said up-converted signal.

3. The method according to claim 2, comprising determining a frequency of one or more of said plurality of phase-quadrature local oscillator signal pairs based on a amount by which one or more of said plurality of repeated signals is to be shifted with respect to said received signal.

4. The method according to claim 1, comprising determining, for one or more of said plurality of repeated signals, an amount by which to shift said received signal based on a receive frequency of a target device for which said first signal is destined.

5. The method according to claim 1, comprising transmitting said plurality of repeated signals to a corresponding plurality of target devices.

6. The method according to claim 5, wherein a first portion of said plurality of target devices receives on a different frequency than a remaining portion of said plurality of target devices.

7. The method according to claim 5, wherein a first portion of said plurality of target devices is in a different physical location than a remaining portion of said plurality of target devices.

8. The method according to claim 1, comprising determining, for one or more of said plurality of repeated signals, an amount by which to shift said one or more received signals based on noise present in a wireless communication medium.

9. The method according to claim 1, comprising determining whether to add or subtract said in-phase portion of said up-converted signal and said quadrature-phase portion of said up-converted signal based on a polarity one or more of said plurality of local oscillator signal pairs.

10. The method according to claim 1, comprising transmitting said first signal from a source device to a target device via a plurality of repeater devices.

11. A system for signal processing, the system comprising:

one or more circuits enabled to;

frequency shift a received signal by a different amount to generate each of a plurality of repeated signals, wherein each of said plurality of repeated signals comprises one or more signal components; and

control a phase and/or amplitude of each of said one or more signal components to control a directivity of each of said repeated signals.

12. The system according to claim 11, wherein said one or more circuits are enabled to generate each of said plurality of repeated signals by:

quadrature down-converting said received signal by mixing said received signal with a first of a plurality of phase-quadrature local oscillator signal pairs;

up-converting said down-converted signal by mixing said down-converted signal with a second of said phase-quadrature local oscillator signal pairs; and

adding or subtracting an in-phase portion of said up-converted signal and a quadrature-phase portion of said up-converted signal.

13. The system according to claim 12, wherein said one or more circuits are enabled to determine a frequency of one or more of said plurality of phase-quadrature local oscillator signal pairs based on a amount by which one or more of said plurality of repeated signals is to be shifted with respect to said received signal.

14. The system according to claim 11, wherein said one or more circuits are enabled to determine, for one or more of said plurality of repeated signals, an amount by which to shift said received signal based on a receive frequency of a target device for which said first signal is destined.

15. The system according to claim 11, wherein said one or more circuits are enabled to transmit said plurality of repeated signals to a corresponding plurality of target devices.

16. The system according to claim 15, wherein a first portion of said plurality of target devices receives on a different frequency than a remaining portion of said plurality of target devices.

17. The system according to claim 15, wherein a first portion of said plurality of target devices is in a different physical location than a remaining portion of said plurality of target devices.

18. The system according to claim 11, wherein said one or more circuits are enabled to determine, for one or more of said plurality of repeated signals, an amount by which to shift said one or more received signals based on noise present in a wireless communication medium.

19. The system according to claim 11, wherein said one or more circuits are enabled to determine whether to add or subtract said in-phase portion of said up-converted signal and said quadrature-phase portion of said up-converted signal based on a polarity one or more of said plurality of local oscillator signal pairs.

20. The system according to claim 11, wherein said one or more circuits are enabled to transmit said first signal from a source device to a target device via a plurality of repeater devices.