Hybrid automatic repeat requests coding in MIMO networks

• US 8,073,071 B2
• Filed: 09/26/2008
• Issued: 12/06/2011
• Est. Priority Date: 01/16/2008
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Electric Research Laboratories, Inc. (Mitsubishi Electric Corporation)
• Inventors: Orlik, Philip V., Molisch, Andreas F., Tao, Zhifeng, Zhang, Jinyun, Matsumoto, Wataru
• Primary Examiner(s): Lee, Siu
• Application Number:
  US12/239,491
• Publication Number:
  US 20090180568A1
• Time in Patent Office: 1,166 Days
• Field of Search: 375/267, 375/316, 375/295, 375/299, 375/347, 375/346, 375/349
• US Class Current: 375/267
• CPC Class Codes: H04L 1/0606 Space-frequency coding
• CPC Class Codes: H04L 1/0662 Limited orthogonality systems
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message

Abstract

A method transmits a block of symbols in a multiple-input multiple-output (MIMO) network including a transmitter having a set of transmit antennas and a receiver having a set of receive antennas. A block of symbols is coded with a first code to generate a first block, which is transmitted and received. If a decoding of the first block is incorrect, then block of symbols is coded with the first code and then a second code different than the first code to generate a second block. The second block is transmitted, received and combined with the first block to recover the block of symbols.

Claims

1. A method for transmitting a block of symbols in a multiple-input multiple-output (MIMO) network including a transmitter having a set of transmit antennas and a receiver having a set of receive antennas, comprising the steps of:

coding, in the transmitter, a block of symbols with a first code to generate a first block, wherein the first code is a forward-error correcting code and;

transmitting the first block;

receiving, in the receiver, the first block;

decoding, after the receiving, the first block, and if the decoding is incorrect performing the step of;

coding, in the transmitter, the block of symbols with the first code and then a second code different than the first code to generate a second block;

transmitting the second block;

receiving, in the receiver, the second block; and

combining the first block and the second block to recover the block of symbols;

wherein the second code is a self-interference cancellation code (SICC) based on Hadamard matrices and the second block is

2. The method of claim 1, wherein the transmitting and receiving uses spatial multiplexing.

3. The method of claim 1, wherein the receiver includes a maximum likelihood detector.

4. The method of claim 1, wherein the receiver uses a minimum mean square error and zero forcing.

5. The method of claim 1, wherein the combining eliminates self-interference.

6. The method of claim 1, wherein the Hadamard matrices for the received second block are