METHOD AND APPARATUS FOR MITIGATING MULTIUSER ACCESS INTERFERENCE

• US 20070072550A1
• Filed: 09/28/2006
• Published: 03/29/2007
• Est. Priority Date: 09/28/2005
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Wang, Shu
• Application Number:
  US11/536,500
• Publication Number:
  US 20070072550A1
• Time in Patent Office: Days
• US Class Current: 455/63.100
• CPC Class Codes: H04B 1/7105 Joint detection techniques, e.g. linear detectors
• CPC Class Codes: H04B 1/712 Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04B 2201/709727 GRAKE type RAKE receivers
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04L 25/022 of frequency response
• CPC Class Codes: H04L 25/0226 sounding signals per se

Abstract

A method of mitigating interference in a multiple access interference wireless communication system is disclosed. More specifically, the method comprises receiving at least one signal from at least one transmitting end, constructing a group of first signal signatures based on a predetermined number of received signals and at least one second signal signature, estimating a set of values using the constructed group of first signal signatures, and detecting desired information using the detected set of values.

Claims

1. A method of mitigating interference in a multiple access interference wireless communication system, the method comprising:

receiving at least one signal from at least one transmitting end;

constructing a group of first signal signatures based on a predetermined number of received signals and at least one second signal signature;

estimating a set of values using the constructed group of first signal signatures; and

detecting desired information using the detected set of values.

2. The method of claim 1, wherein the group of first signal signatures is referred to as a blind spreading matrix.

3. The method of claim 1, wherein the at least one second signal signature is referred to as spreading sequence.

4. The method of claim 3, wherein the at least one second signal structure is known by a receiving end.

5. The method of claim 1, wherein the set of values is referred to as a detection vector.

6. The method of claim 1, wherein at least one of the set of values and the desired information is acquired by any one of least squares (LS), total least squares (TLS), mixed LS/TLS, best linear unbiased (BLU), and minimum mean squared error (MMSE) detection schemes.

7. An apparatus for mitigating interference in a multiple access interference wireless communication system, the system comprising:

a receiving unit for receiving at least one signal from at least one transmitting end;

a constructing unit for a group of first signal signatures based on a predetermined number of received signals and at least one second signal signature;

an estimating unit estimating a set of values using the constructed group of first signal signatures;

a combining unit for combining the at least one estimated variable component with the constructed data matrix; and

a detecting unit for detecting desired information using the detected set of values.

8. The apparatus of claim 7, wherein the group of first signal signatures is referred to as a blind spreading matrix.

9. The apparatus of claim 8, wherein the at least one second signal signature is referred to as spreading sequence.

10. The apparatus of claim 7, wherein the at least one second signal structure is known by a receiving end.

11. The appartus of claim 7, wherein the set of values is referred to as a detection vector.

12. The method of claim 7, wherein at least one of the set of values and the desired information is acquired by any one of least squares (LS), total least squares (TLS), mixed LS/TLS, best linear unbiased (BLU), and minimum mean squared error (MMSE) detection schemes.

13. A method of mitigating interference in a multiple access interference wireless communication system, the method comprising:

receiving signals from at least one transmitting end;

constructing a blind spreading sequence matrix in which each interference is treated as known signal and data matrix;

estimating at least one variable component by using the at least one received signals and by using the constructed blind spreading sequence matrix;

multiplexing the at least one estimated variable component with the constructed data matrix; and

detecting data using the at least one combined variable component