In this paper, link adaptation with decoupled code rates has been discussed in context of two-hop decode and forward (DAF) relay network. The source and the relay use variable rate low density parity check (LDPC) codes to encode the data, whereas the relay (in receiving mode) and the destination use the log domain iterative decoding algorithm to decode the data. Nakagami channels of different fading depths have been used. An algorithm has been designed to achieve the optimal performance by ensuring a target bit error rate (BER). Extensive Monte Carlo simulation results show that if decoupled code rates are used on both hops then a trade-off has to be maintained between system complexity, transmission delay and BER. More specifically, the system performs well in terms of lower BER, however, the complexity of the system also increases.
Performance Analysis of LDPC-Based Rate Adaptive Relays over Nakagami Channels
2018-08-01
200193 byte
Conference paper
Electronic Resource
English
Protograph EXIT Analysis over Block Fading Channels with Application to Relays
German Aerospace Center (DLR) | 2012
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