Acquisition And Tracking Of Beidou Satellite Signal

With the constant development of electronic technique, satellite-navigationtechnology becomes the hot issue in the research and development of all countries.The satellite navigation system owns independent intellectual property right which isnot only the significant symbol of national military and science&technology, but alsothe important aspect to balance national comprehensive strength. American GPS andRussian GLONASS satellite navigation system has been mature technology and wideapplication.Choose the BeiDou Navigation Satellite System which is developedindependently by our country as my topic goal, and analyse the BeiDou navigationreceiver baseband processing is not merely has theoretical significance but also canprovide practical base for researching and development..The paper, combined with the GPS algorithm theory to analyze the Beidousatellite navigation receiver baseband processing algorithm and Implementation. Thebroadcast navigation of satellite is analyzed and processed by the down-conversion ofsatellite signal for the input signal. The system algorithm and circuit structure of themodule is analyzed and described in detail.The principle line is signal process ofbeidou navigation receiver, analyze beidou satellite signal and its feature and mainlyintroduce the distinction of pseudo-random code and structure of navigation message.Then analyze the acquisition algorithm of beidou satellite signal, mainly research theDoppler effect of beidou satellite, and analyze the acquisition algorithm of serialsearch, acquisition algorithm of parallel frequency search and algorithm of parallelcode phase search, as well as summarize the acquisition of beidou satellite signal.After analyzing acquisition algorithm of satellite signal, then research the trackingalgorithm of satellite signal, the carrier tracking and code tracking are discussed andreceiver baseband processing is researched. The recover and demodulation of beidousatellite navigation message are also analyzed. The last part is the realization andsimulation of algorithm, which shows the main implement code and systemsimulation. To conclude, after the implementation of the verification of systemsimulation, the author has put forward some improvement. For example, further studyon the implementation of parallel frequency search and Parallel code phase search onthe basis of serial search acquisition implementation, and combine them in someeffective way to improve acquisition performance. For tracing modules, after theimplementation of system design and simulation, tracking performance can be further promoted, e.g., the arctangent phase discriminator is introduced to improve theperformance of carrier phase differential.The prospective result is got through hardware implementation, systemsimulation and test. Simulation test proves that the program is suitable for thebaseband signal processing of beidou navigation receiver. The project can providereference for the research and development of Beidou satellite navigation basebandprocessing chip.The paper involves the related knowledge of physics, electronic circuit andcommunications technology, as well as analyzes and discusses the integrated circuitdesign, electronic systems and satellite communication of code division multipleaccess satellite system, the discussed solution can be used in the designing andresearching of baseband processing of beidou navigation receiver.