UWB系统复合导频信道估计方法

摘要

Superimposed system has the defect of estimating accuracy difference,and auxiliary pilot has the defect of occupancy excessive bandwidth.Aiming at this situation,the composite pilot channel estimation method is put forward.The little composite pilot is inserted in the superimposed pilot.Due to the UWB channel is slow-varying channel,the superimposed pilot can reference the channel estimation of auxiliary pilot.The channel estimation of auxiliary pilot and superimposed pilot are stacked into new channel estimation.The simulation results show the auxiliary pilot channel estimation inherits the advantage of pilot channel estimation,and the channel estimation accuracy is improved,and the occupancy bandwidth is decreased.%隐藏系统具有估计精度差的缺陷,辅助导频具有占用带宽多的缺陷,针对这种情况提出了复合导频信道估计方法,在隐藏导频中插入极少量的辅助导频,由于UWB信道是慢变信道,所以隐藏导频可以借鉴辅助导频的信道估计,把辅助导频和隐藏导频的信道估计叠加成新的信道估计.仿真结果表明,复合导频信道估计继承了两种导频信道估计的优点,提高了信道估计精度,减少了带宽占用率.