Linear Precoder and Decoder Design for Two-Way AF MIMO Relaying System

A relay based wireless network system is basically composed of three nodes, two source nodes which are also destination nodes and the relay node which helps reliable communications between two nodes. The amplify-and-forward (AF) relaying scheme is more convenient to implement than the decode-and-for...

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Published in:VTC Spring 2008 - IEEE Vehicular Technology Conference pp. 1221 - 1225
Main Authors: Namyoon Lee, Heesun Park, Joohwan Chun
Format: Conference Proceeding
Language:English
Published: IEEE 01.05.2008
Subjects:
Bit error rate
Broadcasting
Iterative algorithms
Iterative decoding
MIMO
Protocols
Quality of service
Relays
Telecommunication network reliability
Wireless networks
ISBN:1424416442, 9781424416448
ISSN:1550-2252
Online Access:Get full text
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Abstract A relay based wireless network system is basically composed of three nodes, two source nodes which are also destination nodes and the relay node which helps reliable communications between two nodes. The amplify-and-forward (AF) relaying scheme is more convenient to implement than the decode-and-forward (DF) relaying scheme which requires a decoding process at the relay node. In this paper, we design an optimal linear precoder and decoder which minimize the sum of mean squared error (SMSE) when the relay and the destination node have perfect knowledge of the channel state information (CSI) for the forward and the backward channels, respectively. The optimal linear precoder and decoder solutions are obtained by using the proposed iterative algorithm which satisfies the KKT optimality conditions. The average BER performance of the proposed scheme is compared with those of a conventional AF-ZF scheme and AF-MMSE scheme.
AbstractList A relay based wireless network system is basically composed of three nodes, two source nodes which are also destination nodes and the relay node which helps reliable communications between two nodes. The amplify-and-forward (AF) relaying scheme is more convenient to implement than the decode-and-forward (DF) relaying scheme which requires a decoding process at the relay node. In this paper, we design an optimal linear precoder and decoder which minimize the sum of mean squared error (SMSE) when the relay and the destination node have perfect knowledge of the channel state information (CSI) for the forward and the backward channels, respectively. The optimal linear precoder and decoder solutions are obtained by using the proposed iterative algorithm which satisfies the KKT optimality conditions. The average BER performance of the proposed scheme is compared with those of a conventional AF-ZF scheme and AF-MMSE scheme.
Author Joohwan Chun
Namyoon Lee
Heesun Park
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  surname: Joohwan Chun
  fullname: Joohwan Chun
  organization: Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon
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Snippet A relay based wireless network system is basically composed of three nodes, two source nodes which are also destination nodes and the relay node which helps...
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StartPage 1221
SubjectTerms Bit error rate
Broadcasting
Iterative algorithms
Iterative decoding
MIMO
Protocols
Quality of service
Relays
Telecommunication network reliability
Wireless networks
Title Linear Precoder and Decoder Design for Two-Way AF MIMO Relaying System
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