Joint channel coding and modulation in wireless systems

Patent metadata

Field	Value
Publication number	US-10419085-B2
Application number	US-201716099965-A
Country	US
Kind code	B2
Filing date	May 9, 2017
Priority date	May 11, 2016
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Methods are described for performing joint coded spatial and/or antenna based modulation. A first device may receive, from a second device, one or more pilot signals associated with one or more transmit antennas, antenna patterns, and/or antenna polarizations. The first device may determine channel related information associated with an antenna pair based on the pilot signals. The channel related information may include one or more channel cross correlation coefficients. The first device may determine a set-partition, for example, based on the channel related information. The first device may configure a dynamically configurable Trellis Coded Modulation (TCM) decoder based on the determined set-partition.

First claim

What is claimed:

1. A first device comprising:
a receiver configured to:
receive a first pilot signal from a second device, wherein the first pilot signal is associated with a first transmit antenna of the second device; and
receive a second pilot signal from the second device, wherein the second pilot signal is associated with a second transmit antenna of the second device;

a processor configured to:
determine, based on the first pilot signal and the second pilot signal, channel related information associated with an antenna pair;
determine a set-partition based on at least the channel related information and a spatial or antenna based modulation; and
configure, based on the determined set-partition, a dynamically configurable trellis coded modulation (TCM) decoder to decode data received from the second device; and

a transmitter configured to send feedback to the second device indicating the determined set-partition.

2. The first device of claim 1 , wherein, when determining the set-partition, the processor is configured to:
partition a higher order signal space constellation into a first group of lower order constellation subsets, wherein the higher order signal space constellation includes a plurality of constellation points, and wherein each of the plurality of constellation points is assigned to a respective constellation subset in the first group;
partition each of the constellation subsets in the first group into a second group of constellation subsets, wherein each of the plurality of constellation points in each of the constellation subsets in the first group is assigned to a respective constellation subset in the second group; and
map a set of bits to the plurality of constellation points assigned to the second group of constellation subsets.

3. The first device of claim 2 , wherein a minimum distance between the plurality of constellation points is increased with each partitioning, and wherein the first group of constellation subsets and the second group of constellation subsets have a same respective number of constellation points as the higher order signal space constellation.

4. The first device of claim 1 , wherein, when determining the set-partition, the processor is configured to:
determine one or more spatial correlation coefficients for a set of transmit antennas that includes the first transmit antenna and the second transmit antenna; and
determine, based on the one or more spatial correlation coefficients, a plurality of subsets of the set of transmit antennas, wherein a minimum distance between transmit antennas in each subset of the plurality of subsets is maximized.

5. The first device of claim 1 , wherein the channel related information comprises one or more channel cross correlation coefficients.

6. The first device of claim 1 , wherein the feedback enables the second device to configure a dynamically configurable TCM encoder of the second device that corresponds to the dynamically configurable TCM decoder of the first device.

7. The first device of claim 1 , wherein the feedback includes one or more of the channel related information and an antenna index associated with the determined set-partition, and wherein the feedback is sent via one or more of a control channel and a PHY header.

8. The first device of claim 1 , wherein the antenna pair is a transmit/receive antenna pair, and wherein the first pilot signal is associated with a first transmit antenna pattern, and wherein the second pilot signal is associated with a second transmit antenna pattern.

9. The first device of claim 1 , wherein the first device is a wireless transmit/receive unit (WTRU), and the second device is an eNodeB, an access point (AP), or a base station.

10. The first device of claim 1 , wherein the first pilot signal is associated with one or more of a first antenna pattern and a first antenna polarization, and wherein the second pilot signal is associated with one or more of a second antenna pattern and a second antenna polarization.

11. The first device of claim 1 , wherein the receiver is configured to receive the data from the second device, and
wherein the processor is configured to:
determine an estimated antenna index,
map the estimated antenna index to a bit sequence of the data, and
decode the mapped bit sequence using the dynamically configurable TCM decoder.

12. A method of joint coded modulation comprising:
receiving a first pilot signal from a device, wherein the first pilot signal is associated with a first transmit antenna of the device;
receiving a second pilot signal from the device, wherein the second pilot signal is associated with a second transmit antenna of the device;
determining, based on the first pilot signal and the second pilot signal, channel related information associated with an antenna pair;
determining a set-partition based on at least the channel related information and a spatial or antenna based modulation;
configuring, based on the determined set-partition, a dynamically configurable Trellis Coded Modulation (TCM) decoder to decode data received from the device; and
sending feedback to the device indicating the determined set-partition.

13. The method of claim 12 , wherein determining the set-partition comprises:
partitioning a higher order signal space constellation into a first group of lower order constellation subsets, wherein the higher order signal space constellation includes a plurality of constellation points, and wherein each of the plurality of constellation points is assigned to a respective constellation subset in the first group;
partitioning each of the constellation subsets in the first group into a second group of constellation subsets, wherein each of the plurality of constellation points in each of the constellation subsets in the first group is assigned to a respective constellation subset in the second group; and
mapping a set of bits to the plurality of constellation points assigned to the second group of constellation subsets.

14. The method of claim 13 , wherein a minimum distance between the plurality of constellation points is increased with each partitioning, and wherein the first group of constellation subsets and the second group of constellation subsets have a same respective number of constellation points as the higher order signal space constellation.

15. The method of claim 12 , wherein determining the set-partition comprises:
determining one or more spatial correlation coefficients for a set of transmit antennas that includes the first transmit antenna and the second transmit antenna; and
determining, based on the one or more spatial correlation coefficients, a plurality of subsets of the set of transmit antennas, wherein a minimum distance between transmit antennas in each subset of the plurality of subsets is maximized.

16. The method of claim 12 , wherein the channel related information comprises one or more channel cross correlation coefficients.

17. The method of claim 12 , wherein the feedback enables the device to configure a dynamically configurable TCM encoder that corresponds to the dynamically configurable TCM decoder.

18. The method of claim 12 , wherein the feedback includes one or more of the channel related information and an antenna index associated with the determined set-partition, and wherein the feedback is sent via one or more of a control channel and a PHY header.

19. The method of claim 12 , wherein the antenna pair is a transmit/receive antenna pair, and wherein the first pilot signal is associated with a f

Assignees

• Idac Holdings Inc

Inventors

• Ferrante Steven
• Olesen Robert L
• Pan Kyle Jung-Lin
• Xi Fengjun
• Lou Hanqing

Classifications

• H04B7/0417 Primary

  Feedback systems · CPC title

• H04L1/006

  Trellis-coded modulation · CPC title

• H04L25/0204

  of multiple channels · CPC title

• H04B7/0634

  Antenna weights or vector/matrix coefficients · CPC title

• H04L1/005

  Iterative decoding, including iteration between signal detection and decoding operation · CPC title