Parameter optimization of block interleaver for polar coding with bit-interleaved coded modulation

A parameter optimization scheme of block interleaver for polar coding with bit-interleaved coded modulation (BICM) is proposed in this paper. We analyze the characteristics of a random interleaver applied to polar codes with high-order modulation, which is ideal but infeasible to implement. Then we derive the parameter optimization algorithm of block interleaver for polar coding with BICM. The block interleaver optimized by our proposed scheme has a significant performance gain over the block interleaver with the modulation order as the width in 16-ary quadratic amplitude modulation (16-QAM) signaling. Moreover, it has the comparable performance with the random interleaver for 16-QAM.