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The authors investigate joint network and channel coding schemes for networks when relay nodes are not capable of performing channel coding operations. Rather, channel encoding is performed at the source node while channel decoding is done only at the destination nodes. They examine three different decoding strategies: independent network-then-channel decoding, serial network and channel decoding, and joint network and channel decoding. Furthermore, they describe how to implement such joint network and channel decoding using iteratively decodable error correction codes. Using simple networks as a model, they derive achievable rate regions and use simulations to demonstrate the effectiveness of the three decoders.
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