基于双边偏差补偿隐藏导频UWB系统信道估计方法

摘要

在隐藏导频系统中,导频和数据的分离过程需要大量的计算,而且分离的导频并不纯净.针对这种情况,提出双边偏差补偿信道估计方法,即:数据预先经过双边偏差补偿,使数据的均值为零并叠加导频信息,接收端用传统的均值方法就能分离出纯净的导频信息,由于使用更少的数据运载导频,所以减少了导频分离过程的计算量.仿真结果表明,双边偏差补偿信道估计方法可以显著降低误码率,减少计算量,在发射功率和峰均功率比方面也有所改善.%In the superimposed pilot system, the separation process of pilot and data requires large a-mounts of calculation, and the separated pilot is not pure. Aimed at this situation and using bipolar threshold compensation, a channel estimation method was put forward, in which the data would pass the bipolar threshold compensation at first, making the means of the data equal to zero and superimposing the pilot information. The data receiver could use traditional zero-mean method to separate pure pilot informa-tioa Because less data-carrying pilot was used, the calculation of pilot separation process would be decreased. The simulation result showed that the channel estimation algorithm with bipolar threshold compensation would significantly reduce the bit error rate and calculation amount As for the transmission power, its peak-to-average ratio would be improved, also.