Optimization scheme of noisy network coding in the two way relay channels

In this paper we consider the Two Way Relay Channel (TWRC) where Noisy Network Coding (NNC) is performed. We propose an optimization scheme in terms of the sum rate by combining the Information Bottleneck (IB) method and the Bi-Section method. Then we compare the performance of the quantizer optimized by the proposed algorithm with other quantizers. We also compare and analyse the maximized sum rate with the results when Compress and Forward (CF), Decode and Forward (DF) and Quantize and Forward (QF) are performed. The simulation results demonstrate the correctness and effectiveness of the proposed algorithm.