Multipath Channel Characteristics and Multipath Life-time Model Research for Different GNSS Orbit Satellites

Xiaoran Fang, Xin Chen, Yuze Wang, Le Cai, Rendong Ying, Peilin Liu

Peer Reviewed

Abstract:	It is commonly recognized that multipath acts as a major error source to the Global Navigation Satellite Systems (GNSS) receiver positioning. Multipath propagation can significantly distort the shape of correlation function waveforms, resulting in biased GNSS measurements. Although many algorithms are proposed in the literatures to mitigate the effects of multipath, only a few of which focus on studying the characteristics of multipath “micro” parameters, where the concept “micro” parameters of multipath are referring to the code phase delay, power attenuation, carrier phase changing rate and the number of echoes with the real-world satellite signal data [1, 2]. In this paper, we study multipath channel characteristics in terms of the “micro” parameters. A GNSS Application-defined Software Receiver (GSARx) which is developed by SJTU is used to detect and estimate the multipath signal parameters of BDS B1I signal and GPS L1 signal. The time-varying characteristics of the multipath delay, amplitude, phase-changing-rate and the multipath life-time are all obtained and analyzed. These characteristics are not only useful for researchers to propose more efficient multipath mitigation methods, but also conductive to emulating more precise multipath scenarios in terms of simulator design. Besides, each multipath signal has been approved to have some existing period. Therefore, all multipath possess a life-time feature, and a life-time model research is applied.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	2957 - 2965
Cite this article:	Fang, Xiaoran, Chen, Xin, Wang, Yuze, Cai, Le, Ying, Rendong, Liu, Peilin, "Multipath Channel Characteristics and Multipath Life-time Model Research for Different GNSS Orbit Satellites," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 2957-2965.
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