Abstract:

QPP(Quadratic Polynomial Permutation) interleaver is a new deterministic interleaver based on permutation polynomial, and it has become the hotspot of interleaver researching in Turbo coding because of its easy operation, low complexity, flexible structure and excellent performance. This paper analyzes the principle of QPP interleaver, and verifies both QPP interleaver and its inverses with the maximum contentionfree feature that can improve the efficiency of highspeed subblocks parallel Turbo decoding. Simulation results show that, QPP interleaver can also significantly improve the performance of highspeed subblocks parallel Turbo decoding.

Key words: interleaver, maximum contention-free(MCF), turbo codes, parallel decoding