Low-complexity relay precoder designs for two-way AF MIMO relay systems

An eigenmode-selection approach was recently presented for relay precoding subject to the minimum/maximum sum of condition numbers of the effective multiple-input multiple-output (MIMO) channels in a two-way amplify-and-forward (AF) MIMO relay system. Although this method can achieve close-to-optima...

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Published in:IEEE International Conference on Communications (2003) pp. 1 - 6
Main Authors: Wang, Chin-Liang, Chen, Jyun-Yu, Peng, Yi-Hsuan
Format: Conference Proceeding Journal Article
Language:English
Published: IEEE 01.05.2016
Subjects:
amplify-and-forward (AF)
Channels
Complexity
condition number
Conferences
Decision support systems
Design engineering
MIMO
MIMO (control systems)
multiple-input multiple-output (MIMO)
Precoding
Relay
Relay systems
Searching
Signal processing
two-way relaying
ISSN:1938-1883
Online Access:Get full text
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Abstract An eigenmode-selection approach was recently presented for relay precoding subject to the minimum/maximum sum of condition numbers of the effective multiple-input multiple-output (MIMO) channels in a two-way amplify-and-forward (AF) MIMO relay system. Although this method can achieve close-to-optimal performance, it would involve high search complexity for the solution in a relay precoding set of size 2·M!, where M is the degrees of freedom of the MIMO relay system. In this paper, we propose low-complexity relay precoder designs based on eigenmode selection for two-way AF MIMO relay systems. We first exploit the properties of condition numbers of the effective MIMO channels, and then present two set-reduction methods accordingly for eigenmode-selection precoding to minimize/maximize the sum of condition numbers. As compared with the original eigenmode-selection precoding scheme, the proposed designs reach similar performance but reduce the search complexity by a factor of M(M-1).
AbstractList An eigenmode-selection approach was recently presented for relay precoding subject to the minimum/maximum sum of condition numbers of the effective multiple-input multiple-output (MIMO) channels in a two-way amplify-and-forward (AF) MIMO relay system. Although this method can achieve close-to-optimal performance, it would involve high search complexity for the solution in a relay precoding set of size 2·M!, where M is the degrees of freedom of the MIMO relay system. In this paper, we propose low-complexity relay precoder designs based on eigenmode selection for two-way AF MIMO relay systems. We first exploit the properties of condition numbers of the effective MIMO channels, and then present two set-reduction methods accordingly for eigenmode-selection precoding to minimize/maximize the sum of condition numbers. As compared with the original eigenmode-selection precoding scheme, the proposed designs reach similar performance but reduce the search complexity by a factor of M(M-1).
An eigenmode-selection approach was recently presented for relay precoding subject to the minimum/maximum sum of condition numbers of the effective multiple-input multiple-output (MIMO) channels in a two-way amplify-and-forward (AF) MIMO relay system. Although this method can achieve close-to-optimal performance, it would involve high search complexity for the solution in a relay precoding set of size 2.M!, where M is the degrees of freedom of the MIMO relay system. In this paper, we propose low-complexity relay precoder designs based on eigenmode selection for two-way AF MIMO relay systems. We first exploit the properties of condition numbers of the effective MIMO channels, and then present two set-reduction methods accordingly for eigenmode-selection precoding to minimize/maximize the sum of condition numbers. As compared with the original eigenmode-selection precoding scheme, the proposed designs reach similar performance but reduce the search complexity by a factor of M(M-1).
Author Jyun-Yu Chen
Chin-Liang Wang
Yi-Hsuan Peng
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SubjectTerms amplify-and-forward (AF)
Channels
Complexity
condition number
Conferences
Decision support systems
Design engineering
MIMO
MIMO (control systems)
multiple-input multiple-output (MIMO)
Precoding
Relay
Relay systems
Searching
Signal processing
two-way relaying
Title Low-complexity relay precoder designs for two-way AF MIMO relay systems
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