Research Of Multipath Processing Algorithm On Satellite Navigation Receiver

With the rapid development of satellite navigation systems,the users market puts forward higher index requirements for the positioning accuracy of navigation and positioning receivers.Most of the positioning errors can be controlled using modeling,differential,etc.,but the positioning error caused by multi-path signals cannot have eliminated in this way.Multi-path error has become one of the major sources of error affecting the accuracy of navigation positioning.In order to improve the utilization of navigation spectrum resources and obtain good compatibility and interoperability among various systems,in recent years,modulated signals such as BOC,MBOC,and AltBOC have been adopted by multiple navigation satellite systems including GPS,Galileo,and BDS,broadcast with the BPSK signals together.The new system navigation signal theoretically has superior multi-path suppression performance,but what kind of technical means can maximize the system's multi-path suppression capability is a key technical problem that needs to study.The main research content of this paper is the multi-path processing technology of modern satellite navigation signals,including the principle structure and performance evaluation of the algorithm,and the comprehensive complexity,bandwidth sensitivity,and multi-path suppression performance have compared.Firstly,the paper introduces the satellite navigation and positioning system through the principle of satellite navigation,the receiver software and hardware design scheme.Second,the paper analyses the principle,characteristic and how to affect the tracking error of satellite navigation receiver.The modulation principles and signal characteristics of modern satellite navigation signals have introduced in the context of BDS;The Narrow Correlator,HRC,CCRW(W2,W3,and W4 CCRW)have studied in three modern satellite navigation signal multipath processing technologies.Finally,the test results are summarized.Receiver under the condition of input same multipath processing algorithm to get the positioning accuracy of the results is analyzed,and combined multipath inhibition test results,bandwidth sensitivity and complexity,came to a conclusion.In engineering applications,W2 CCRW consumes the least amount of hardware resources,multipath processing effect is better,has obvious advantages in the multi-path processing technology of modern satellite navigation signals.