针对由扩展汉明码构建的分组Turbo码,提出了一种可行的估计无竞争码字比特外部信息值的取值方法,并与现有文献中的方法进行仿真比较.仿真结果表明,该方法在高斯信道和Rayleigh衰落信道中都得到较好的译码性能.
An efficient method to estimate the extrinsic information for the bits without compete codewords in the decoding of block Turbo codes built with extended Hamming codes is presented in this paper. The performances of this method are compared with the available methods through the simulation. The simulation results show the better performances can be obtained with the proposed method over both Gaussian channel and Rayleigh fading channel.