【摘要】 针对室内信道,提出一种基于UWB多径信号中最强路径检测的TOA估计算法.通过卷积运算进行最强路径搜索,进而完成TOA估计.TOA估计过程不依赖视距路径(line-of-sight path)检测,适合于NLOS(non line-of-sight)情形,且最强路径搜索避免了阈值设置过程,相比LP搜索计算复杂度低.通过对IEEE.802.15.4a标准下NLOS信道模型的仿真实验,讨论了各参数估计偏差对定位性能的影响,验证了本定位算法在室内多径信道下的适用性.更多还原

【Abstract】 A TOA estimation algorithm based on the strongest path detection of the UWB multipath signal in the indoor channel is proposed.The convolution operation is designed for the strongest path search to implement TOA estimation.TOA estimation need not depend on the LOS path(LP) and is suitable for NLOS(non line-of-sight),and the strongest path search has the advantage of low-complexity computation compared with LP detection due to avoiding the process of threshold setting.Through experiments using NLOS channels in IEEE 802.15.4a,the localization influence due to algorithm parameters is discussed,which proves the applicability of the proposed localization algorithm in the indoor multipath channel NLOS environment.更多还原