基于铁道OFDM系统的信道估计改进算法的研究
The improved channel estimation algorithm for railway OFDM system

针对铁路通信系统，在深入研究信道估计方法的基础上，从提高导频子信道估计精度与提高数据子信道估计精度2个方面，提出一种改进型的信道估计算法。在提高导频子信道估计精度方面，利用降噪的处理来解决，在提高数据子信道估计精度方面，利用非线性内插来解决，这样使得所提出的方法具有低的计算复杂度和高的估计精度，改进算法经计算机仿真后证明其有效性，也为今后OFDM信道估计的进一步研究开拓思路。
On the basis of in-depth study of channel estimation methods, from the aspects of improving pilot sub-channel estimation accuracy and improve the accuracy of the data sub-channels estimation accuracy, the authors proposed an improved channel estimation algorithm in railway telecommunication. In terms of improving the accuracy of pilot sub-channels estimated using the noise reduction processing to solve, in terms of improving accuracy estimates sub-channel data using non-linear interpolation to solve, such that the proposed method has a low computational complexity and high estimation accuracy. The improved algorithm by computer simulation to prove its effectiveness, and also pioneering ideas for further study OFDM channel estimation