Turbo编码GMSK信号准相干解调时的迭代信道估计和译码研究

Iterative channel estimation and decoding algorithm for quasi-coherent demodulation of Turbo coded GMSK signals

针对准相干解调Turbo编码GMSK信号,提出了一种简便的迭代信道估计算法。该方法基于Turbo码的迭代译码原理,将信道估计和译码联合考虑,利用译码器输出反馈进行迭代信道估计,从而提高了估计精度。仿真结果表明,该方法能显著地改善系统误码率性能。

A new simple iterative channel estimation algorithm for quasi-coherent demodulation Turbo coded GMSK signals was presented. Based on the iterative decoding principle of Turbo code, the algorithm improved the channel estimation accuracy using output of decoder. Numerous simulation results show that the proposed algorithm can improve bit error rate （BER） performance dramatically.