Method and apparatus for diversity combining and co-channel interference suppression

• US 7,295,637 B2
• Filed: 11/04/2002
• Issued: 11/13/2007
• Est. Priority Date: 11/04/2002
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Posonidis, Aristidis, Aretos, Konstantinos, Frantzeskakis, Emmanuel, Papathanasiou, Apostolos
• Primary Examiner(s): Payne; David C.
• Assistant Examiner(s): Ettehadieh; Aslan
• Application Number:
  US10/286,660
• Publication Number:
  US 20050074071A1
• Time in Patent Office: 1,835 Days
• Field of Search: 375/267, 375/347, 375/142, 375/144, 375/148, 375/150, 375/346, 455/501, 455/63.1, 455/67.13, 455/296, 455/114.2, 455/278.1
• US Class Current: 375/347
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 1/02 by diversity reception
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01

Abstract

A method and apparatus for controlling an antenna array for wireless communication are described. The method uses the statistical characteristics of the received signal noise in controlling the antenna array in order to achieve directional reception in a wireless communication system and suppress co-channel interference. Furthermore, the method can be used to power space-division multiple access and can be used in conjunction with multi-carrier modulation signaling.

Claims

1. A method for processing a received wireless signal, the method comprising:

computing at least one diversity combining weight vector for each of a plurality of information data blocks within the received wireless signal based on at least one correlation estimate of an unwanted signal component within the received wireless signal, and at least one channel response of an antenna array used for receiving the wireless signal;

determining at least one input logic level of the received wireless signal based on said computed at least one diversity combining weight vector; and

for each of said plurality of information data blocks, determining a correlation matrix of said unwanted signal component based on said at least one input logic levels and said at least one channel response, to process the received wireless signal.

2. The method of claim 1, wherein the received wireless signal comprises a sequence of information data blocks and wherein each data block comprises a plurality of samples.

3. The method of claim 1, wherein the received wireless signal comprises one or more of the following:

an orthogonal frequency division multiplexing (OFDM) symbol and a multicarrier modulated symbol.

4. The method of claim 1, comprising initializing said at least one correlation estimate of said unwanted signal component to memory stored values.

5. The method of claim 4, wherein said at least one correlation estimate of said unwanted signal component comprises at least one of the following:

an auto-correlation and a cross-correlation, and wherein said auto-correlation is assigned a unit value and said cross-correlation is assigned a zero value.

6. The method of claim 1, wherein said computing of said at least one diversity combining weight vector uses a recursive least squares algorithm.

7. The method of claim 1, wherein the received wireless signal comprises at least one sequence of training data blocks respective to at least one transmitter device, each sequence of training data blocks carrying information from only one transmitter device, wherein said at least one sequence of training data blocks are used for estimating said at least one channel response of said antenna array.

8. The method of claim 7, comprising updating said at least one channel response of said antenna array based on the determined at least one input logic level.

9. A system for processing a received wireless signal, the system comprising:

circuitry that computes at least one diversity combining weight vector for each of a plurality of information data blocks within the received wireless signal based on at least one correlation estimate of an unwanted signal component within the received wireless signal, and at least one channel response of an antenna array used for receiving the wireless signal;

said circuitry determines at least one input logic level of the received wireless signal based on said computed at least one diversity combining weight vector; and

said circuitry determines a correlation matrix of said unwanted signal component for each of said plurality of information data blocks, based on said at least one input logic level and said at least one channel response, to process the received wireless signal.

10. The system of claim 9, wherein the received wireless signal comprises a sequence of information data blocks and wherein each data block comprises a plurality of samples.

11. The system of claim 9, wherein the received wireless signal comprises one or more of the following:

an orthogonal frequency division multiplexing (OFDM) symbol and a multicarrier modulated symbol.

12. The system of claim 9, wherein said circuitry initializes said at least one correlation estimate of said unwanted signal component to memory stored values.

13. The system of claim 9, wherein said at least one correlation estimate of said unwanted signal component comprises at least one of the following:

an auto-correlation and a cross-correlation, and wherein said auto-correlation is assigned a unit value and said cross-correlation is assigned a zero value.

14. The system of claim 9, wherein said computing of said at least one diversity combining weight vector uses a recursive least squares algorithm.

15. The system of claim 9, wherein the received wireless signal comprises at least one sequence of training data blocks respective to at least one transmitter device, each sequence of training data blocks carrying information from only one transmitter device, wherein said at least one sequence of training data blocks are used for estimating said at least one channel response of said antenna array.

16. The system of claim 15, wherein said circuitry updates said at least one channel response of said antenna array based on the determined at least one input logic level.