Detection for physical-layer network coding in two-way relay channels

The detection for physical-layer network coding (PNC) in two-way relay channels was investigated. Maximum-likelihood (ML) detection not only had great performance but also had high computational complexity. Therefore, without channel state information (CSI) at source nodes, two detection schemes wer...

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Bibliographic Details
Published inTongxin Xuebao Vol. 33; no. 2; pp. 82 - 86
Main Authors Yan, Wei, Cai, Yue-Ming, Pan, Cheng-Kang
Format Journal Article
LanguageChinese
Published Editorial Department of Journal on Communications 01.02.2012
Subjects
Channels
Coding
Complexity
Computation
detection
Equivalence
likelihood ratio
maximum a posteriori probability
maximum-likelihood
Messages
Networks
physical-layer network coding
Relay
Online AccessGet full text
ISSN1000-436X

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Summary:The detection for physical-layer network coding (PNC) in two-way relay channels was investigated. Maximum-likelihood (ML) detection not only had great performance but also had high computational complexity. Therefore, without channel state information (CSI) at source nodes, two detection schemes were proposed. The first scheme was likelihood ratio (LR) detection based on LR function, and the other was maximum a posteriori probability (MAP) detection based on MAP rule. Meanwhile, It carried out similar analysis if CSI was available at source nodes. Compared to ML detection which separately detects two source messages, numerical and simulation results show that LR detection outperforms it in terms of BER metric with the requirement for additional noise variance information. And MAP detection is equivalent to ML detection, and it has lower computational complexity.
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ISSN:1000-436X