Balanced Linear Precoding in Decode-and-Forward Based MIMO Relay Communications

This paper proposes a linear precoding technique for multiple-input multiple-output (MIMO) decode-and-forward (DF) based relay communications. The proposed precoder is constructed by linearly combining two independently designed precoders that maximize data rates at relay and destination, respective...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 10; no. 7; pp. 2390 - 2400
Main Authors: Ryu, Jong Yeol, Choi, Wan
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.07.2011
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Access methods and protocols, osi model
Algorithm design and analysis
Antennas
Applied sciences
Balancing
Coding, codes
Communication systems
Design engineering
Exact sciences and technology
Information, signal and communications theory
iterative waterfilling
Joints
Linear precoding
Links
Mathematical models
MIMO
multiple-input multiple-output (MIMO)
Optimization
Relay
relay communications
Relays
Signal and communications theory
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Transmission and modulation (techniques and equipments)
Vectors
Wireless communication
MIMO system
Relay
Transmission protocol
Information rate
Iterative method
multiple-input multiple-output (MIMO)
relay communications
Algorithm
Information transmission
Linear precoding
iterative waterfilling
Coding
Algorithm complexity
Numerical simulation
Routing protocols
Pretreatment
ISSN:1536-1276, 1558-2248
Online Access:Get full text
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Description
Summary:This paper proposes a linear precoding technique for multiple-input multiple-output (MIMO) decode-and-forward (DF) based relay communications. The proposed precoder is constructed by linearly combining two independently designed precoders that maximize data rates at relay and destination, respectively. Contrary to conventional precoding in DF relay communications, the proposed precoding balances direct and relay links and maximize the achievable rate of the overall system. We also propose a distributed precoder design method using limited information. The proposed algorithms are shown to significantly reduce computation complexity of precoder design. The numerical results show that the proposed precoders with full information and limited information achieve significantly higher data rates than conventional precoding neglecting a direct link and comparable data rate to the optimal precoding even when the coefficients for linear combining are restricted to real numbers.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2011.050511.101733