Two-Way MIMO Relay Precoder Design with Channel State Information

In this paper, a two-way relay precoder is designed for multiple-input multiple-output (MIMO) distributed cooperative relay systems. A constrained optimization problem with respect to (w.r.t.) the relay precoder is formulated for the most general relay and antenna scenario, namely, multiple relays e...

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Bibliographic Details
Published in:IEEE transactions on communications Vol. 58; no. 12; pp. 3358 - 3363
Main Authors: Li, Chunguo, Yang, Luxi, Zhu, Wei-Ping
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.12.2010
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
amplify-and-forward
Antennas
Applied sciences
Channels
Coding, codes
Cooperative relays
Cooperative systems
Design engineering
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Information, signal and communications theory
Mathematical analysis
Mean square error methods
mean squared error (MSE)
MIMO
multiple-input multiple-output (MIMO)
Optimization
Radiocommunications
Relay
Relay systems
Relaying
Relays
Signal and communications theory
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
two-way relay precoding
Performance evaluation
Relaying
Parameter estimation
Relay
Convex programming
two-way relay precoding
Mean square error
Lagrange multiplier
Coding
Channel estimation
Routing protocols
Lagrangian method
Antenna array
Antenna
MIMO system
amplify-and-forward
Transmission protocol
Cooperative systems
Cooperative relays
mean squared error (MSE)
Distributed system
multiple-input multiple-output (MIMO)
Constrained optimization
Simulation
One way
ISSN:0090-6778, 1558-0857
Online Access:Get full text
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Description
Summary:In this paper, a two-way relay precoder is designed for multiple-input multiple-output (MIMO) distributed cooperative relay systems. A constrained optimization problem with respect to (w.r.t.) the relay precoder is formulated for the most general relay and antenna scenario, namely, multiple relays each with multiple antennas, It is shown that due to the difficulty of two-way distributed relaying mechanism as well as the block-diagonal nature of the relay precoding matrix, this optimization problem cannot be solved by existing one-way relaying methods. It is then proved that with full channel state information available at relays, the underlying problem can be converted to a convex optimization w.r.t. the non-zero entries of the relay precoding matrix only, such that the Lagrangian multiplier method is applicable to the relay precoder design, leading to a closed-form relay precoding solution. A simulation study is conducted to justify the superior performance of the proposed two-way relaying scheme.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2010.12.100002