基于UWB的多径接收算法改进与研究

An Improved Algorithm for UWB Multipath Reception

为提高RAKE接收机对多径信号的快速分辨能力,提出了一种基于优化抽头系数的最小误比特率(RAKE-MBER)改进算法。进而在不降低多径分辨率的前提下,通过简化RAKE叉指数,实现快速定位的目的。仿真结果表明,在低比特速率与高比特速率多径模拟信道传输条件下,改进后的算法,在性能上优于传统RAKE-MMSE算法,从而提高了UWB系统信号接收的实时性与可靠性。

In order to improve rake-receiver’ s ability to recognize multipath signals quickly,aims at how to re-duce it’s Rake-MMSE algorithm complexity,the text propose an improved algorithm based on Minimum Bit Error Rate （ MBER） by optimizing tap coefficients. On the premise of not reduce the multipath receiving resolu-tion,through the method to simplifying RAKE fork index,to achieve the purpose of rapid positioning. The simu-lation results show that,under the multipath simulation channel conditions at low bit rate and high bit rate,the performance of improved algorithm is better than conventional RAKE-MMSE algorithm,so that improved the instantaneity and reliability of receiving signal in UWB transmision system.