Abstract: This paper mainly discusses the principle and compares different algorithms on Turbo equalization，then simulates Turbo equalization performances on representative wireless channel，and compares the effect of different joint equalization and decoding algorithms and iterations on system performance over wireless channel with severe ISI.Results show that the low-complex MMSE/SOVA algorithm obtains better bit error performance and robustness after several iteration，and can be implemented easily in project.

Key words: Turbo principle, Turbo equalization, Inter Symbol Interference（ISI）, minimum mean square error

摘要： 主要对Turbo均衡的原理和几种算法进行了较详尽地讨论和比较，并针对典型的无线信道，在信道参数已知的情况下，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，从复杂度和误码性能两方面考虑，选择适合于无线信道的Turbo均衡算法，结果表明，LCMMSE/SOVA算法在迭代几次以后具有良好的误码性能，且计算复杂度低，利于工程实现。

关键词: Turbo原理, Turbo均衡, 符号间干扰, 最小均方误差