Method, apparatus and computer program product providing soft iterative recursive least squares (RLS) channel estimator

• US 20070283220A1
• Filed: 05/16/2007
• Published: 12/06/2007
• Est. Priority Date: 05/16/2006
• Status: Active Grant

• Current Assignee: Conversant Wireless Licensing S.à.r.l. (f/k/a Core Wireless Licensing S.a.r.l.) (MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management))
• Original Assignee: Nokia Corporation
• Inventors: Kim, Kyeong
• Granted Patent: US 8,060,803 B2
• Time in Patent Office: Days
• US Class Current: 714/758
• CPC Class Codes: H03M 13/1148 Structural properties of the code parity-check or generator matrix
• CPC Class Codes: H03M 13/2972 Serial concatenation using convolutional component codes

Abstract

Disclosed is an apparatus having a detector for an iterative LDPC-coded MIMO-OFDM system, where the detector is configured to use a structured irregular LDPC code in conjunction with a belief propagation algorithm. Also disclosed is an apparatus having a detector for a structured irregular LDPC-coded MIMO-OFDM system, where the detector is configured to use an iterative Recursive Least Squares-based data detection and channel estimation technique. Corresponding methods and computer program products are also disclosed.

Claims

1. A method, comprising:

providing a detector for an iterative LDPC-coded MIMO-OFDM system; and

using a structured irregular LDPC code in conjunction with a belief propagation algorithm.

2. The method of claim 1, where the belief propagation algorithm is a layered belief propagation algorithm.

3. A method, comprising:

providing a detector for a structured irregular LDPC-coded MIMO-OFDM system; and

using an iterative Recursive Least Squares-based data detection and channel estimation technique for the structured irregular LDPC-coded MIMO-OFDM system.

4. The method of claim 3, where the iterative Recursive Least Squares-based channel estimator is suitable for use over a quasi-static channel that changes slowly.

5. An apparatus, comprising a detector for an iterative LDPC-coded MIMO-OFDM system, said detector configured to use a structured irregular LDPC code in conjunction with a belief propagation algorithm.

6. The apparatus of claim 5, where the belief propagation algorithm is comprised of a layered belief propagation algorithm.

7. The apparatus of claim 5, embodied at least in part in an integrated circuit.

8. An apparatus, comprising a detector for a structured irregular LDPC-coded MIMO-OFDM system, said detector configured to use an iterative Recursive Least Squares-based data detection and channel estimation technique.

9. The apparatus of claim 8, where the iterative Recursive Least Squares-based channel estimator is suitable for use over a quasi-static channel that changes slowly.

10. The apparatus of claim 8, embodied at least in part in an integrated circuit.

11. A computer program product comprising instructions embodied in a tangible data storage medium, execution of the instructions by a data processor resulting in an operation of implementing a detector for an iterative LDPC-coded MIMO-OFDM system that uses a structured irregular LDPC code in conjunction with a belief propagation algorithm.

12. The computer program product of claim 11, where the belief propagation algorithm is a layered belief propagation algorithm.

13. A computer program product comprising instructions embodied in a tangible data storage medium, execution of the instructions by a data processor resulting in an operation of implementing a detector for a structured irregular LDPC-coded MIMO-OFDM system that uses an iterative Recursive Least Squares-based data detection and channel estimation technique.

14. The computer program product of claim 13, where the iterative Recursive Least Squares-based channel estimator is suitable for use over a quasi-static channel that changes slowly.

15. A detector configured for an iterative LDPC-coded MIMO-OFDM system and comprising means for using a structured irregular LDPC code in conjunction with a belief propagation algorithm.

16. The detector of claim 15, where the belief propagation algorithm is comprised of a layered belief propagation algorithm.

17. The detector of claim 15, where at least said using means is embodied in an integrated circuit.

18. A detector configured for a structured irregular LDPC-coded MIMO-OFDM system and comprising means for using an iterative Recursive Least Squares-based data detection and channel estimation technique.

19. The detector of claim 18, where said means for using the iterative Recursive Least Squares-based channel estimator is operable with a quasi-static channel.

20. The detector of claim 18, where at least said using means is embodied in an integrated circuit.