Joint optimal threshold-based relaying and ml detection in network-coded two-way relay channels

Xiang Nian Zeng, Ali Ghrayeb, Mazen Hasna

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this paper, we address the problem of joint optimal threshold-based relaying and maximum likelihood (ML) detection in network-coded cooperative systems. The purpose of using threshold-based relaying is to circumvent the impact of error propagation, which could lead to degrading the system diversity. For simplicity, we consider a simple network comprising two source nodes and one relay node. The relay operates in the decode-and-forward (DF) mode and employs binary network coding. The communication between the two source nodes is bidirectional, resulting in a two-way relay channel. We assume binary phase shift keying (BPSK) signaling. For a given log-likelihood ratio (LLR)-based threshold used at the relay, we derive the ML detector at the destination assuming that the destination has full knowledge of the locations of the blocked bits at the relay. We then derive an expression for the corresponding end-to-end (E2E) bit error rate (BER) performance, which is used to find the optimal threshold. We also derive two practical discontinuous transmission detectors at the destination for the purpose of identifying whether the relay is forwarding or not. The performance of one of the detectors is similar to that when the destination knows the locations of the blocked bits, whereas the performance of the other detector suffers some performance degradation. We present several numerical examples that illustrate the efficacy of the proposed scheme as compared to existing schemes.

Original languageEnglish
Article number6247443
Pages (from-to)2657-2667
Number of pages11
JournalIEEE Transactions on Communications
Volume60
Issue number9
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Detectors
Maximum likelihood
Binary phase shift keying
Network coding
Bit error rate
Degradation
Communication

Keywords

  • Cooperative networks
  • decode-and-forward
  • error propagation
  • ML detection
  • network coding
  • threshold-based relaying
  • two-way relay channel

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Joint optimal threshold-based relaying and ml detection in network-coded two-way relay channels. / Zeng, Xiang Nian; Ghrayeb, Ali; Hasna, Mazen.

In: IEEE Transactions on Communications, Vol. 60, No. 9, 6247443, 2012, p. 2657-2667.

Research output: Contribution to journalArticle

@article{f80f52a2d5e14ff3bb0dba04f0c90513,
title = "Joint optimal threshold-based relaying and ml detection in network-coded two-way relay channels",
abstract = "In this paper, we address the problem of joint optimal threshold-based relaying and maximum likelihood (ML) detection in network-coded cooperative systems. The purpose of using threshold-based relaying is to circumvent the impact of error propagation, which could lead to degrading the system diversity. For simplicity, we consider a simple network comprising two source nodes and one relay node. The relay operates in the decode-and-forward (DF) mode and employs binary network coding. The communication between the two source nodes is bidirectional, resulting in a two-way relay channel. We assume binary phase shift keying (BPSK) signaling. For a given log-likelihood ratio (LLR)-based threshold used at the relay, we derive the ML detector at the destination assuming that the destination has full knowledge of the locations of the blocked bits at the relay. We then derive an expression for the corresponding end-to-end (E2E) bit error rate (BER) performance, which is used to find the optimal threshold. We also derive two practical discontinuous transmission detectors at the destination for the purpose of identifying whether the relay is forwarding or not. The performance of one of the detectors is similar to that when the destination knows the locations of the blocked bits, whereas the performance of the other detector suffers some performance degradation. We present several numerical examples that illustrate the efficacy of the proposed scheme as compared to existing schemes.",
keywords = "Cooperative networks, decode-and-forward, error propagation, ML detection, network coding, threshold-based relaying, two-way relay channel",
author = "Zeng, {Xiang Nian} and Ali Ghrayeb and Mazen Hasna",
year = "2012",
doi = "10.1109/TCOMM.2012.071812.110739",
language = "English",
volume = "60",
pages = "2657--2667",
journal = "IEEE Transactions on Communications",
issn = "0096-1965",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "9",

}

TY - JOUR

T1 - Joint optimal threshold-based relaying and ml detection in network-coded two-way relay channels

AU - Zeng, Xiang Nian

AU - Ghrayeb, Ali

AU - Hasna, Mazen

PY - 2012

Y1 - 2012

N2 - In this paper, we address the problem of joint optimal threshold-based relaying and maximum likelihood (ML) detection in network-coded cooperative systems. The purpose of using threshold-based relaying is to circumvent the impact of error propagation, which could lead to degrading the system diversity. For simplicity, we consider a simple network comprising two source nodes and one relay node. The relay operates in the decode-and-forward (DF) mode and employs binary network coding. The communication between the two source nodes is bidirectional, resulting in a two-way relay channel. We assume binary phase shift keying (BPSK) signaling. For a given log-likelihood ratio (LLR)-based threshold used at the relay, we derive the ML detector at the destination assuming that the destination has full knowledge of the locations of the blocked bits at the relay. We then derive an expression for the corresponding end-to-end (E2E) bit error rate (BER) performance, which is used to find the optimal threshold. We also derive two practical discontinuous transmission detectors at the destination for the purpose of identifying whether the relay is forwarding or not. The performance of one of the detectors is similar to that when the destination knows the locations of the blocked bits, whereas the performance of the other detector suffers some performance degradation. We present several numerical examples that illustrate the efficacy of the proposed scheme as compared to existing schemes.

AB - In this paper, we address the problem of joint optimal threshold-based relaying and maximum likelihood (ML) detection in network-coded cooperative systems. The purpose of using threshold-based relaying is to circumvent the impact of error propagation, which could lead to degrading the system diversity. For simplicity, we consider a simple network comprising two source nodes and one relay node. The relay operates in the decode-and-forward (DF) mode and employs binary network coding. The communication between the two source nodes is bidirectional, resulting in a two-way relay channel. We assume binary phase shift keying (BPSK) signaling. For a given log-likelihood ratio (LLR)-based threshold used at the relay, we derive the ML detector at the destination assuming that the destination has full knowledge of the locations of the blocked bits at the relay. We then derive an expression for the corresponding end-to-end (E2E) bit error rate (BER) performance, which is used to find the optimal threshold. We also derive two practical discontinuous transmission detectors at the destination for the purpose of identifying whether the relay is forwarding or not. The performance of one of the detectors is similar to that when the destination knows the locations of the blocked bits, whereas the performance of the other detector suffers some performance degradation. We present several numerical examples that illustrate the efficacy of the proposed scheme as compared to existing schemes.

KW - Cooperative networks

KW - decode-and-forward

KW - error propagation

KW - ML detection

KW - network coding

KW - threshold-based relaying

KW - two-way relay channel

UR - http://www.scopus.com/inward/record.url?scp=84866740318&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866740318&partnerID=8YFLogxK

U2 - 10.1109/TCOMM.2012.071812.110739

DO - 10.1109/TCOMM.2012.071812.110739

M3 - Article

AN - SCOPUS:84866740318

VL - 60

SP - 2657

EP - 2667

JO - IEEE Transactions on Communications

JF - IEEE Transactions on Communications

SN - 0096-1965

IS - 9

M1 - 6247443

ER -