Groupwise successive interference cancellation for block transmission with reception diversity

• US 8,553,820 B2
• Filed: 06/28/2012
• Issued: 10/08/2013
• Est. Priority Date: 07/19/2002
• Status: Active Grant

• Current Assignee: Rakuten Group, Inc.
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Kwak, Jaeyoung, Pan, Kyle Jung-Lin, Zeira, Ariela
• Primary Examiner(s): Tran, Khanh C
• Application Number:
  US13/535,908
• Publication Number:
  US 20120314740A1
• Time in Patent Office: 467 Days
• Field of Search: 375260-261, 375/267, 375/285, 375/295, 375/316, 375346-349
• US Class Current: 375/347
• CPC Class Codes: H04B 1/7093 Matched filter type
• CPC Class Codes: H04B 1/71055 using minimum mean squared error [MMSE] detector
• CPC Class Codes: H04B 1/71072 Successive interference cancellation
• CPC Class Codes: H04B 7/0854 using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 25/0212 of impulse response
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 25/03305 Joint sequence estimation and interference removal joint detection of several desired signals H04L25/03331
• CPC Class Codes: H04L 25/03318 Provision of soft decisions

Abstract

A plurality of data signals are received over an antenna array having a plurality of antenna elements. The data signals are transmitted over a shared spectrum in a wireless communication system. A signal having each of the data signals is received over each antenna element. The plurality of data signals are grouped into a plurality of groups. The received signals of the antenna elements are matched filtered for a first group of the plurality of groups, producing a matched filtered result. Data is jointly detected of the first group using the matched filtered result. An interference correction signal is constructed using the detected data for each antenna element. The interference cancelled result is subtracted from the received signal of each antenna element, producing an interference cancelled result for each antenna element. Data is successively detected for remaining groups using the interference cancelled result for each antenna element.

Claims

1. A method of receiving data signals over an antenna array having a plurality of antenna elements, the method comprising:

receiving a plurality of bursts;

ordering the bursts based on a combined received power over all of the antenna elements;

dividing the bursts into a plurality of groups, each group having bursts of similar power strength; and

determining soft symbols of a first group using a multiuser block equalizer (BLE).

2. The method of claim 1 further comprising:

constructing an interference correction signal using jointly detected data for each antenna element;

producing an interference cancelled result for each antenna element;

converting the produced interference cancelled result into hard symbols; and

demodulating a radio frequency (RF) signal to produce baseband signals.

3. The method of claim 2 further comprising:

providing channel information based on training sequence components in the baseband signals.

4. The method of claim 1 further comprising:

converting the soft symbols of the first group into hard symbols using hard decisions.

5. The method of claim 4 further comprising:

using the hard symbols to determine a contribution of the first group onto a received sequence of each antenna element.

6. A receiver comprising:

an antenna array comprising a plurality of antenna elements configured to receive a plurality of bursts; and

a group-wise successive interference cancellation joint-detection (GSIC-JD) device configured to order the bursts based on a combined received power over all of the antenna elements, divide the bursts into a plurality of groups, each group having bursts of similar power, and determine soft symbols of a first group using a multiuser block equalizer (BLE).

7. The receiver of claim 6 further comprising:

a demodulator configured to demodulate a radio frequency (RF) signal to produce baseband signals.

8. The receiver of claim 7 further comprising:

a channel estimation device configured to provide channel information to the GSIC-JD device based on training sequence components in the baseband signals.

9. The receiver of claim 6 wherein the GSIC-JD device is further configured to convert the soft symbols of the first group into hard symbols using hard decisions.

10. The receiver of claim 9 wherein the GSIC-JD device is further configured to use the hard symbols to determine a contribution of the first group onto a received sequence of each antenna element.

11. The receiver of claim 6 wherein the receiver is comprised by a base station.

12. The receiver of claim 6 wherein the receiver is comprised by a wireless transmit/receive unit (WTRU).