短波信道数字通信中Turbo均衡技术研究

Research on Turbo Equalizer Technology for the Data Communication on Shortwave Channel

研究turbo均衡原理及几种均衡算法,并针对具有严重ISI的短波信道,在信道参数已知和不匹配的情况下,对不同的联合均衡和译码算法、不同迭代次数对系统性能的影响进行了仿真和比较,结果表明,LMMSE/MAP算法在迭代几次以后具有良好的误码性能和鲁棒性,且计算复杂度低,利于工程实现。

This paper mainly discusses the principle and different algorithms on Turbo equalization,and compares the effect of different joint equalization and decoding algorithms and iterations on system performance over HF channel with severe ISI in thepresence of known and mismatched channel parameters through simulations.Results show that the low-complex LMMSE/ MAP algorithm obtains better bit error performance and robustness after several iteration,and can be implemented easily in project.