Research on Code Design and Performance Analysis of Polar Coded Cooperation Based on SWIPT Technology

‍ ‍Polar coded cooperation can obtain both coding gain and diversity gain to achieve reliable communication. In order to solve the problem of energy limitation of the relay， this paper studies the Polar coded cooperation based on simultaneous wireless information and power transfer （SWIPT） technology. Firstly， the model of Polar coded cooperation based on SWIPT is established. Secondly， in the Plotkin construction method of Polar code， a long code is split into two short codes， which is very suitable for coded cooperation scenarios. Therefore， the Plotkin construction method is used to jointly design the Polar codes employed by the source and relay， and the joint successive cancellation （SC） decoding is performed at the destination. Compared with the traditional point-to-point system， the Polar coded cooperation based on SWIPT greatly reduces the system outage probability. Compared with the low density parity check （LDPC） coded cooperation based on SWIPT， the proposed scheme can achieve better bit error rate （BER） performance when the number of decoding iterations is small.