信道估计中基于变换域的降噪处理技术

本文讨论了信道估计中的降噪处理技术，根据信道中加性高斯噪声的特点，提出在变换城中抑制噪声能量的方法。大大提高了估计精度。文中分析了两种降噪算法，并从理论上分析了算法一的处理增益。仿真表明．经过降噪算法二处理后信道估计精度得到了大犬的提高。其估计误差时系统误码性能的影响已经极小，单纯靠提高信道估计精度已很难进一步改善系统的误码性能。

Noise Reducing Technology in Channel Estimation

In this paper, we discuss the noise reducing technology in channel estimation. According to the characteristic of additive noise, transform domain based noise reducing algorithms are proposed, which can reduce the noise energy dramatically. Two algorithms are considered in this paper, the Algorithm One's processing gain is analyzed theoretically. According to simulation results, the processing gain of Algorithm Two is greater than Algorithm One. The precision of estimation results after Algorithm Two is sufficient for equalization, because hardly any further bit error performance can be achieved by improving the precision of channel estimation.