Performance of Adaptive Distributed Network Channel Coding Scheme in the Wireless Sensor Network
XU Wei-don · Power System and Clean Energy · 2013
In this paper,we study Adaptive Distributed Network Channel Coding(ADNCC) scheme based on Turbo product codes(TPC) where a number of sensors in the smart grid transmit to the same destination with the help of multirelay.This network can be modeled by a multiple-access relay channe(lMARC).In the proposed scheme,each source encodes its data independently using the same systematic linear block code.The codeword transmitted from the sources to the destination are eavesdropped by multi-relay.A product code is built at the relays,with rows being the source codeword,using a second systematic linear block code as column encoder.The resulting additional redundancy is then transmitted to the destination.From received source and relay codeword,the product code word observation is formed and Turbo decoded at the destination.In order to mitigate the influence of the degraded source-relay channel,we investigate Selective Coding Cooperation(S-CC)scheme and Estimative Coding Cooperation(E-CC)scheme.Different cooperation schemes are compared in terms of performance.A coding gain of more than 3 dB of ECC scheme is achieved on the additive white Gaussian noise(AWGN)channel.