Soft bits based fading correction for coded Physical Layer Network Coding

This paper investigates a novel fading correction scheme for coded Physical Layer Network Coding (PLNC) on the two-way relay channel (TWRC). Two different Soft Demodulators for QPSK modulated PLNC are adaptively selected by the relay according to relative fading factor. The relative fading factor can be treated as a correction factor which will be included in the Complementary Side Information (C-SI) at the destination nodes. The corrected soft information is then extracted and fed into channel decoder. Improved throughput is thus achieved.