Research Of GPS/Galileo Dual-system Navigation Receiver Baseband Algorithm

With the improvement of BDS systems,satellite navigation receiver technology plays an increasing role in the development of people's lives and the national economy.With the background of U.S.GPS system constantly upgrading,and the European Galileo system is maturing,the research for dual-system receiver has become the development trend of the current receiver.This paper will study and analyze the GPS/Galileo dual-system navigation receiver baseband algorithms.This paper studies the dual-system receiver baseband algorithms in aspects:First,we do the research of the new signals acquisition and tracking algorithms,and the signal's multi-peak cancellation algorithm,the receiver's high dynamic carrier tracking loop design;second,we propose a method to design a compatible and configurable receiver baseband channel,that is compatible with different systems to acquire and track signals of different systems and improve the receiver baseband channel compatibility.The main points of this paper can be summarized as follows:Firstly,this paper studied the modulation of GPS and Galileo signals,involves a new signal frequency,the signal characteristics,and based on the above analysis of the new signal modulation;we simulated the signals.Secondly,based on the study of the signal system,and the characteristics of the signals,we introduced acquisition and tracking algorithms,and then we analyze joint-acquisition technology,combined multi-peak cancellation technology,and gives 3FLL-4PLL carrier tracking loop.Then,based on the dual-system multi-frequency receiver baseband features,this paper presents a compatible configurable baseband channel design,and gives the design scheme and the simulation results.Finally,analysis describes in detail the structure of the software and hardware simulation system and the hardware receiver design,and test results are given in this paper.Through the dual-system receiver of the whole system research,design,debug,validate the proposed high-level carrier tracking loop and compatible configurable channel design.