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Network coded modulation for two-way relaying

Network coded modulation for two-way relaying
Network coded modulation for two-way relaying
Network coding compresses multiple traffic flows with the aid low-complexity algebraic operations, hence holds the potential of significantly improving both the power and bandwidth efficiency of wireless networks. In this contribution, the novel concept of Network Coded Modulation (NCM) is proposed for jointly performing network coding and modulation in bi-directional/duplex relaying. Each receiver is colocated with a transmitter and hence has prior knowledge of the message intended for the distant receiver. As in classic coded modulation, the Euclidian distance between the symbols is maximized, hence the Symbol Error Ratio (SER) is minimized. Specifically, we conceive NCM methods for PSK, PAM and QAM based on modulo addition of the normalized phase or amplitude. Furthermore, we propose low complexity decoding algorithms based on the corresponding conditional minimum distance criteria. Our performance analysis and simulations demonstrate that NCM relying on PSK is capable of achieving a SER at both receivers of the NCM scheme as if the relay transmitted exclusively to a single receiver only. By contrast, when our NCM concept is combined with PAM/QAM, an SNR loss (<1.25dB) is imposed at one of the receivers, usually at the one having a lower data rate in a realistic different rate scenario. Finally, we will demonstrate that the proposed NCM is compatible with existing physical layer designs.
978-1-61284-255-4
1765-1770
Chen, Wei
43d5a7bc-ca02-4943-881e-56f901b5f533
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Cao, Zhigang
ba5ff979-4ea1-4cbb-81d6-34166bc0d900
Chen, Wei
43d5a7bc-ca02-4943-881e-56f901b5f533
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Cao, Zhigang
ba5ff979-4ea1-4cbb-81d6-34166bc0d900

Chen, Wei, Hanzo, Lajos and Cao, Zhigang (2011) Network coded modulation for two-way relaying. 2011 IEEE Wireless Communications and Networking Conference (WCNC), Cancun, Mexico. 28 - 31 Mar 2011. pp. 1765-1770 . (doi:10.1109/WCNC.2011.5779429).

Record type: Conference or Workshop Item (Paper)

Abstract

Network coding compresses multiple traffic flows with the aid low-complexity algebraic operations, hence holds the potential of significantly improving both the power and bandwidth efficiency of wireless networks. In this contribution, the novel concept of Network Coded Modulation (NCM) is proposed for jointly performing network coding and modulation in bi-directional/duplex relaying. Each receiver is colocated with a transmitter and hence has prior knowledge of the message intended for the distant receiver. As in classic coded modulation, the Euclidian distance between the symbols is maximized, hence the Symbol Error Ratio (SER) is minimized. Specifically, we conceive NCM methods for PSK, PAM and QAM based on modulo addition of the normalized phase or amplitude. Furthermore, we propose low complexity decoding algorithms based on the corresponding conditional minimum distance criteria. Our performance analysis and simulations demonstrate that NCM relying on PSK is capable of achieving a SER at both receivers of the NCM scheme as if the relay transmitted exclusively to a single receiver only. By contrast, when our NCM concept is combined with PAM/QAM, an SNR loss (<1.25dB) is imposed at one of the receivers, usually at the one having a lower data rate in a realistic different rate scenario. Finally, we will demonstrate that the proposed NCM is compatible with existing physical layer designs.

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Published date: March 2011
Venue - Dates: 2011 IEEE Wireless Communications and Networking Conference (WCNC), Cancun, Mexico, 2011-03-28 - 2011-03-31
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 272169
URI: http://eprints.soton.ac.uk/id/eprint/272169
ISBN: 978-1-61284-255-4
PURE UUID: d4e01cd7-28ae-42fe-bf9c-66afb8b46aa6
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 11 Apr 2011 10:45
Last modified: 01 Nov 2023 02:33

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Contributors

Author: Wei Chen
Author: Lajos Hanzo ORCID iD
Author: Zhigang Cao

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