Performance analysis of adaptive physical layer network coding for wireless two-way relaying

Muralidharan, Vijayvaradharaj T and Rajan, Sundar B (2013) Performance analysis of adaptive physical layer network coding for wireless two-way relaying. In: IEEE Transactions on Wireless Communications, 12 (3). pp. 1328-1339.

PDF IEEE_Trans_Wir_Com_12-3_1328_2013.pdf - Published Version Restricted to Registered users only Download (404kB) | Request a copy

Abstract

The performance analysis of adaptive physical layer network-coded two-way relaying scenario is presented which employs two phases: Multiple access (MA) phase and Broadcast (BC) phase. The deep channel fade conditions which occur at the relay referred as the singular fade states fall in the following two classes: (i) removable and (ii) non-removable singular fade states. With every singular fade state, we associate an error probability that the relay transmits a wrong network-coded symbol during the BC phase. It is shown that adaptive network coding provides a coding gain over fixed network coding, by making the error probabilities associated with the removable singular fade states contributing to the average Symbol Error Rate (SER) fall as SNR-2 instead of SNR-1. A high SNR upper-bound on the average end-to-end SER for the adaptive network coding scheme is derived, for a Rician fading scenario, which is found to be tight through simulations. Specifically, it is shown that for the adaptive network coding scheme, the probability that the relay node transmits a wrong network-coded symbol is upper-bounded by twice the average SER of a point-to-point fading channel, at high SNR. Also, it is shown that in a Rician fading scenario, it suffices to remove the effect of only those singular fade states which contribute dominantly to the average SER.

Item Type:	Journal Article
Publication:	IEEE Transactions on Wireless Communications
Publisher:	IEEE-Inst Electrical Electronics Engineers Inc
Additional Information:	Copyright of this article belongs to IEEE-Inst Electrical Electronics Engineers Inc.
Keywords:	Denoise-and-Forward; Physical Layer Network Coding; Wireless Two-Way Relaying
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	29 May 2013 10:25
Last Modified:	29 May 2013 10:25
URI:	http://eprints.iisc.ac.in/id/eprint/46609

Actions (login required)

View Item