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Performance and ExIT chart analysis of BICM-ID for physical layer network coding

Lookup NU author(s): Alaa Al-Rubaie, Professor Harris Tsimenidis, Dr Martin Johnston, Professor Bayan Sharif


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Physical layer network coding (PNC) is a novel technique that allows two users to exchange messages in a wireless network. The most significant feature of PNC is the exploitation of interference at a relay due to incoming signals from two users, allowing an increase in throughput. In this paper, Extrinsic Information Transfer (ExIT) charts are employed to evaluate the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID) combined with PNC. We address critical design issues to enhance decoding performance and provide analytical bounds on the performance. The analysis is extended for PNC employing Turbo and Low-Density Parity-Check (LDPC) codes to compare the performance with BICM-ID on the AWGN channel. Our results show that BICM-ID with PNC performs very similarly to a turbo-coded PNC scheme but, surprisingly, it outperforms a LDPC-coded PNC scheme, due to the Sum-Product decoding algorithm, which is less robust to unreliable symbols broadcast from the relay and needs more iterations to reach convergence. This shows that when considering trade-offs between performance and complexity, BICM-ID is an attractive coding scheme for wireless relay networks employing PNC. © 2013 IEEE.

Publication metadata

Author(s): Al-Rubaie AAS, Tsimenidis CC, Johnston M, Sharif B

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: IEEE 20th International Conference on Electronics, Circuits and Systems (ICECS)

Year of Conference: 2013

Pages: 205-208

Online publication date: 15/05/2014

Publisher: Institute of Electrical and Electronics Engineers Inc.

DOI: 10.1109/ICECS.2013.6815390

Library holdings: Search Newcastle University Library for this item

ISBN: 9781479924523