中文摘要：

TD—SCDMA系统中普遍采用的B．Steiner信道估计算法是一种低代价算法，但是由于背景噪声的影响，其信道冲激响应的幅度和时延相对于真实值存在误差，降低系统性能。在B．Steiner算法的基础上提出了一种门限后处理方法，减少噪声影响。仿真结果表明，这种方法可以在不增加算法复杂度的情况下获得较好的系统性能。

英文摘要：

B. Steiner channel estimation algorithm that is widely used in TD-SCDMA system is a low-cost algorithm. However, because of the affection of background noise , there are some errors of amplitudes and delays between the estimated implues responses and the real ones, which result in bad system performance. A gate method base on B. Steiner algorithm to reduce the affection of the noise is proposed. The simulation results show that this method is able to get a good performance without causing more algrithm complication.