2 research outputs found
Relay Selection with Network Coding in Two-Way Relay Channels
In this paper, we consider the design of joint network coding (NC)and relay
selection (RS) in two-way relay channels. In the proposed schemes, two users
first sequentially broadcast their respective information to all the relays. We
propose two RS schemes, a single relay selection with NC and a dual relay
selection with NC. For both schemes, the selected relay(s) perform NC on the
received signals sent from the two users and forward them to both users. The
proposed schemes are analyzed and the exact bit error rate (BER) expressions
are derived and verified through Monte Carlo simulations. It is shown that the
dual relay selection with NC outperforms other considered relay selection
schemes in two-way relay channels. The results also reveal that the proposed NC
relay selection schemes provide a selection gain compared to a NC scheme with
no relay selection, and a network coding gain relative to a conventional relay
selection scheme with no NC.Comment: 11 pages, 5 figure
Joint Channel-Network Coding Strategies for Networks with Low Complexity Relays
We 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. We examine three different decoding strategies:
independent network-then-channel decoding, serial network and channel decoding,
and joint network and channel decoding. Furthermore, we describe how to
implement such joint network and channel decoding using iteratively decodable
error correction codes. Using simple networks as a model, we derive achievable
rate regions and use simulations to demonstrate the effectiveness of the three
decoders.Comment: accepted and to appear in European Transactions on Telecommunication