Huang, Tao, Yuan, Jinhong, and Sun, Qifu Tyler (2013) Opportunistic Pair-wise Compute-and-Forward in Multi-way Relay Channels. In: Proceedings of 2013 IEEE International Conference on Communications (ICC). pp. 4614-4619. From: ICC 2013: IEEE International Conference on Communications, 9-13 June 2013, Budapest, Hungary.

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Abstract

In this paper, we propose a novel opportunistic pair-wise transmission scheme in a multi-way relay channel (MWRC), in which multiple users exchange information via a common relay. We investigate pair-wise compute-and-forward for MWRCs by exploiting the multi-user fading channels. Conventionally, a pair-wise physical-layer network coding scheme with binary phase shift keying modulation was studied for a MWRC. In this paper, the proposed opportunistic pair-wise compute-and-forward employs high level modulation with nested lattice codes to improve the sum-rate of multi-user transmission. We demon-strate that this novel opportunistic pair-wise transmission has a 2 bits/s/Hz improvement in the sum-rate performance at signal-to-noise ratio of 30 dB for a 4-user MWRC. For the same MWRC, up to 4.5 dB gain or 2.5 dB gain can be achieved for an uncoded or a channel-coded system, respectively, at the frame error probability of 10−2.

Item ID:	93572
Item Type:	Conference Item (Research - E1)
ISBN:	978-1-4673-3122-7
Keywords:	Relays; Lattices; Decoding; Gain; Signal to noise ratio; Vectors; Fading
Related URLs:	https://icc2013.ieee-icc.org/
Copyright Information:	© 2013 IEEE.
Funders:	Australian Research Council (ARC)
Projects and Grants:	ARC DP110104995
Date Deposited:	18 Aug 2026 05:34
FoR Codes:	40 ENGINEERING > 4099 Other engineering > 409902 Engineering instrumentation @ 100%
SEO Codes:	28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering @ 100%
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