Design Of Signal And Information Processing Algorithm For Multi-Constellation Navigation Platform

Recently,the Global Satellite Navigation System is developing rapidly,and the related navigation signal processing technology has also been researched accordingly.Particularly,various improved algorithms have been more applied to software receivers.Navigation receivers are undergoing a transition from single-mode receivers to multimode receivers.Multi-mode receivers can make full use of existing navigation resources to easily achieve higher-precision navigation and positioning.Therefore,multiconstellation and multi-band navigation software reception.The machine will become the focus of future research.Aiming at the multi-constellation navigation platform,this paper designs an algorithm to process the received satellite signals,and use a lot of navigation data to test its function and performance.This article first introduces the current research status of software receivers in signal and information processing,and then puts forward the research ideas of this article,which will introduce navigation signal processing and navigation information processing from two aspects.Navigation signal processing specifically includes three contents: Antiinterference processing,capture,tracking,and navigation information processing also include three contents: cycle slip detection and repair,ambiguity processing,and positioning solution.So as to provide a basis for the analysis of multi-constellation multiband navigation algorithm design.On the basis of the previous theory,the design goals and schemes of the signal and information processing algorithm of the multi-constellation navigation platform are proposed.This scheme is a design scheme that can process multiple constellation satellite signals and use the multi-frequency characteristics of satellite signals to achieve precise positioning.The specific features of the algorithm include:1)Support different constellation environments of GPS,GALILEO,BDS,GLONASS;2)Support signals of BPSK modulation mode and BOC modulation mode;3)Support input signals of any center frequency;4)Support data preprocessing of intermediate frequency signals;5)Support multi-frequency point multi-constellation navigation signal processing:6)Support the extraction of ephemeris data from multi-constellation navigation signals;7)Support the processing of cycle slip,ambiguity and other errors in the navigation signal.In the process of verifying the algorithm scheme,for each part of the algorithm,a detailed experimental plan was designed and verified.Finally,relevant experiments are done on the function and performance of the entire algorithm.The experimental data includes both simulated signals and actual collected signals,as well as download data from the IGS official website.A large number of experimental results fully verified the feasibility of the design algorithm.