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Journal of Electrical and Computer Engineering
Volume 2010 (2010), Article ID 530190, 5 pages
http://dx.doi.org/10.1155/2010/530190
Research Article

Cooperative Signaling with Soft Information Combining

Department of Electrical and Computer Engineering, University of Canterbury, Christchurch 8014, New Zealand

Received 30 August 2009; Accepted 27 October 2009

Academic Editor: Luca De Nardis

Copyright © 2010 Rui Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We propose a Decode-and-Forward (DF) scheme using distributed Turbo code (DTC) for a three-node (source, relay, and destination) wireless cooperative communication system. The relay decodes, then interleaves, and reencodes the decoded data. It then forwards the reencoded packet and its instantaneous receive SNR to the destination. The performances using both ideal and quantized SNR are studied. The destination uses a modified metric within a Turbo decoding algorithm to scale the soft information calculated for the relay code. The proposed scheme is simple to implement and performs well.