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.

Key words: UWB, localization, multipath detection, TOA estimation, non-line-of-sight