【摘要】 该文研究近似Log-M AP算法在turbo译码器中的应用。文章对基于近似算法的W CDM A turbo译码器在AW GN信道和平坦慢衰落Rayleigh信道上的纠错性能进行了仿真。仿真结果表明,二阶近似Log-M AP turbo译码器与M A P turbo译码器性能等价,优于SO VA turbo译码器0.7-0.9dB。更多还原

【Abstract】 In this paper,approximated Log-MAP turbo decoders are studied.BER performances of WCDMA turbo decoders based on the approximated Log-MAP algorithms are simulated and compared over AWGN channel and flat slow fading Rayleigh channel.Simulation results show that BER performances of second-order approximated Log-MAP algorithm are equivalent to the MAP algorithm,with 0.7-0.9dB higher than that of SOVA turbo decoder.更多还原