Receiver apparatus, and associated method, for operating upon data communicated in a MIMO, multi-code, MC-CDMA communication system

• US 20060083291A1
• Filed: 10/15/2004
• Published: 04/20/2006
• Est. Priority Date: 10/15/2004
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Hao, Guan, Hongming, Zheng, Reid, Anthony, Yong, Teng
• Application Number:
  US10/967,023
• Publication Number:
  US 20060083291A1
• Time in Patent Office: Days
• US Class Current: 375/148
• CPC Class Codes: H04L 1/0631 Receiver arrangements
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/0242 using matrix methods
• CPC Class Codes: H04L 25/03216 using the M-algorithm
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions

Abstract

Apparatus, and an associated method, for mitigating interference introduced upon data communicated to an MIMO receiver using an MC-CDMA communication system. The dimension of the received data is reduced to a single-representation in a manner in which inter-code and inter-antenna interference is mitigated.

Claims

1. Apparatus for facilitating data reception at a MIMO receiver that receives coded, multi-carrier CDMA-modulated data at a set of receive antennas upon channels susceptible to distortion, said apparatus comprising:

a dimension converter adapted to receive indications of the coded, multi-carrier CDMA-modulated data detected at each receive antenna of the set of receive antennas, said dimension converter for converting the indications of the coded, multi-carrier CDMA-modulated data into a single-dimensional data representation; and

an interference mitigator adapted to receive indications of the single-dimensional data representation formed by said dimension converter, said interference mitigator for mitigating interference introduced upon the coded, multi-carrier CDMA-modulated data during communication thereof upon the channels.

2. The apparatus of claim 1 wherein the coded, multi-carrier CDMA-modulated data of which said dimension converter is adapted to receive comprises non-orthogonally-coded, multi-carrier CDMA-modulated data.

3. The apparatus of claim 2 wherein the non-orthogonally-coded, multi-carrier CDMA-modulated data of which said dimension converter is adapted to receive comprises a DABBA-coded multi-carrier CDMA-modulated data.

4. The apparatus of claim 1 wherein the set of receive antennas comprises a first receive antenna and a second receive antenna, wherein the indications of the coded, multi-carrier, CDMA-modulated data is two-dimensional, and wherein said dimension converter comprises a two-dimension to one-dimension converter for converting the indications into the single-dimensional data representation.

5. The apparatus of claim 1 wherein said interference mitigator comprises a data decoder that decodes the indications of the single-dimensional data to form a decoded representation thereof, the decoded representation free of the interference.

6. The apparatus of claim 5 wherein the coded, multi-carrier CDMA-modulated data is block-encoded and wherein said data decoded comprises a block decoder.

7. The apparatus of claim 1 wherein the interference mitigated by said interference mitigator comprises inter-antenna interference.

8. The apparatus of claim 1 wherein the interference mitigated by said interference mitigator comprises inter-code interference.

9. The apparatus of claim 1 wherein said dimension converter comprises a multiplier adapted to receive the indications of the coded, multi-carrier CDMA-modulated data detailed at each of the receive antennas, said multiplier for multiplying the indications by a matrix multiplicand.

10. The apparatus of claim 9 wherein the matrix multiplicand by which said multiplier multiplies the indications of the coded, multi-carrier CDMA-modulated data comprises values representative of the channels upon which the data is communicated.

11. The apparatus of claim 10 wherein the matrix multiplicand by which said multiplier multiplies the indications of the coded, multi-carrier CDMA-modulated data comprises values representative of spreading codes by which the data is coded.

12. The apparatus of claim 11 wherein the matrix multiplicand comprises a Hermetian of a matrix formed of a combination of a channel matrix and a spreading code matrix.

13. The apparatus of claim 1 further comprising Fourier transformers associated with each receive antenna of the set of receive antennas, and wherein the indications of the coded, multi-carrier CDMA-modulated data received by said dimension converter comprise Fourier-transformed representations thereof.

14. A method for facilitating data reception at a MIMO receiver that receives coded, multi-carrier, CDMA-modulated data at a set of receive antennas upon channels susceptible to distortion, said method comprising the operations of:

converting indications of the coded, multi-carrier, CDMA-modulated data received at the receiver into a single-dimensional data representation; and

mitigating interference components of the single-dimensional data representation of the data introducaed upon the data during communication thereof upon the channels.

15. The method of claim 14 wherein the indications of the coded, multi-carrier, CDMA-modulated data converted during said operation of converting comprise indications of DABBA-coded, multi-carrier CDMA-modulated data.

16. The method of claim 14 wherein said operation of mitigating comprises decoding the indications of the single-dimensional data to form a decoded representation thereof, the decoded representation free of interference.

17. The method of claim 14 wherein the interference mitigated during said operation of mitigating comprises inter-antenna interference.

18. The method of claim 14 wherein the interference mitigated during said operation of mitigating comprises inter-code interference.

19. The method of claim 14 wherein said operation of converting comprises multiplying the indications by a matrix multiplicand.

20. The method of claim 19 wherein said operation of multiplying comprises multiplying the indications by a Hermetian of a matrix formed of a combination of a channel matrix and a spreading code matrix.