The existing methods for interleaver estimation usually use hard-decision of the demodulator output sequence, their robustness against error bits is to be improved and some methods only aim at certain interleavers.Focusing on the random interleaver of Turbo codes, this paper presents an estimation algorithm which uses soft-decision.Firstly, the concept and calculation method of the average conformity of parity-check equation are given.Then, the permutation positions of the interleaver are estimated step by step, using the truth that the correct permutation position could maximize the average conformity of parity-check equation.Especially, the proposed algorithm still performs well in puncturing case.Results of simulation experiments show that our algorithm has better performance and relatively lower complexity, especially in low signal-to-noise ratio cases, compared to the existing relevant algorithms.
刘骏, 李静, 彭华. 基于校验方程平均符合度的Turbo码交织器估计[J]. 电子学报, 2016, 44(5): 1213-1218.
LIU Jun, LI Jing, PENG Hua. Estimation of Turbo-Code Interleaver Based on Average Conformity of Parity-Check Equation. Chinese Journal of Electronics, 2016, 44(5): 1213-1218.
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2016, Vol. 44 
