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JSAC
2006

Distributed Turbo Coding With Soft Information Relaying in Multihop Relay Networks

8 years 11 months ago
Distributed Turbo Coding With Soft Information Relaying in Multihop Relay Networks
It has been shown that distributed turbo coding (DTC) can approach the capacity of a wireless relay network. In the existing DTC schemes, it is usually assumed that error-free decoding is performed at a relay. We refer to this type of DTC schemes as perfect DTC. In this paper, we propose a novel DTC scheme. For the proposed scheme, instead of making a decision on the transmitted information symbols at the relay as in perfect DTC, we calculate and forward the corresponding soft information. We derive parity symbol soft estimates for the interleaved source information when only the a posteriori probabilities of the information symbols are known. The results show that the proposed scheme can effectively mitigate error propagation due to erroneous decoding at the relay. Simulation results also confirm that the proposed scheme approaches the outage probability bound of a distributed two-hop relay network at high signal-to-noise ratios.
Yonghui Li, Branka Vucetic, Tan F. Wong, Mischa Do
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2006
Where JSAC
Authors Yonghui Li, Branka Vucetic, Tan F. Wong, Mischa Dohler
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