双边阈值补偿隐藏导频UWB系统信道估计新方法

在隐藏导频信道估计系统中，导频和数据叠加同时发送，造成接收端分离的导频信息中掺杂 着数据成分，从而严重干扰信道估计，目前尚无针对这方面的解决方案，因此提出双边阈值 补偿算法，该算法应用于发送端。发送数据经过双边阈值补偿算法处理后迫使数据均值为零 ，然后叠加导频信息并发送出去，接收端用传统的导频数据分离方法就可以得到高质量的导 频信息，从而提高信道估计精度。仿真结果表明：和传统隐藏导频信道估计系统相比，在最 小二乘和最小均方误差算法下信道估计精度和误码率方面均有明显改善。

A new bilateral threshold compensation algorithm for UWB hidden pilot system channel estimation

In the hidden pilot channel estimation system, the pilot and data are supe rimposed and simultaneously transmitted,the pilot information which has caused the receiver end separated,is mixed with data components so as to induce the ch annel estimation accuracy difference, now there is no solution for this regard, so the bilateral threshold compensation algorithm is proposed. This algorithm is applied in the sender data,the send data after bilateral threshold compensation algorithm processing force data with zero mean,then superimpose the pilot infor mation and send out, the receiver end uses the traditional pilot data separation method to obtain high quality pilot information. Simulation results show that, compared with the traditional hidden pilot channel estimation system, the proposed method significantly improves the channel estimation, in the Least Squa res(LS) algorithm and Minimum Mean Square Error(MMSE) algorithm,channel estimati on accuracy and error rate have significantly been improved.