Advanced signal processing techniques for multipath mitigation in land transportation environment

Abstract

International audienceGNSS (Global Navigation Satellite Systems) are today the core of all new ITS applications and require increasing accuracy in particular in dense urban areas where complex localization scenarios become more and more frequent as the number of users evolves. In order to reduce inaccuracy caused by the obstacles around the receiver's antenna, a solution lies in developing new filtering algorithms. These algorithms will take into account both the variation of the noise distribution over time and the reception environment. This paper intends to be a synthesis of our investigations conducted both theoretically and experimentally since 2006. They have been performed by cooperation between Ecole Centrale of Lille and the INRETS-LEOST lab. Results show the achieved performances of each of the proposed algorithms

GNSS Positioning in Non-line-of-Sight Context—a Survey for Technological Innovation

“…• Modified receiver processing strategies -describes approaches were the receiver architectures is modified in order to achieve better signal processing aspects: [59], [60], [61], [62], [63], [64], [65], [66], [67], [68].…”

“…Thus, building boundary data, digital terrain models and building models were used. [8], [14], [33], [50], [80], [98], [99] [4], [14], [30], [33], [35], [92], [47], [48], [50], [51], [58], [67], [68], [70], [74], [81], [82], [83], [85] Via person [18], [22] [43], [49], [66], [71] (No information) [28], [29], [31], [32], [34], [37], [73], [84], [86], [87], [88] Simulation Static measurement…”

“…Via vehicle [90] [14], [27], [56], [68], [91], [94] Via person (No information) [25], [41], [89], [95] Furthermore, this analysis reveals that these projects used a combination of technical designs in order to identify the NLOS signal. For example, [18] used building models, consistency checking, signal geometry and signal strength information within one algorithm.…”

Software Controlled Beam Steerable Antenna

“…More advanced techniques for multipath mitigation have recently been proposed. For example, Marais et al (2010) discusses the implementation of Jump Markov System (JMS) where the state of the multipath induced error at a GNSS receiver could be known a priori using a Markov model chain. In a closed simulation environment, JMS algorithm was shown to have a lower error rate and an increased accuracy in GNSS localization applications.…”