Research On Solution Process For Receiver Of BeiDou Navigation Satellite System

With the rapid development of navigation and positioning system and the expansion of its application scope,the precision for positioning algorithm is getting more scholars' attentions.So how to improve the positioning precision is becoming the study direction of more scholars.The paper mainly studied the solution processing for receiver of Bei Dou navigation satellite system.In order to improve the accuracy of positioning results,the paper analyzed the main error sources' model and selected the optimal error processing model through the comparison of modification effect of different models.In positioning algorithm processing section,the paper proposed the application of Kalman Filter in navigation and positioning system,and compared with traditional least square method,the effect of Kalman Filter is more smooth and accurately.Finally,obtained the complete solver results of receiver solution processing part through software according to the overall flow of navigation solution and better error processing model.After described the development of the Beidou navigation system and the research status of positioning algorithm and error processing model,the paper studied the overview of Beidou navigation system,basic theory of navigation and positioning system,structure and principles of receiver and overall process for user solution.And then,based on the whole process of navigation position,subsequent chapters dealed with following three parts,including orbit calculation,error processing model and navigation solution processing.Orbit calculation included the study of process and algorithm for satellite positioning,and the correctness of algorithm can be proved by calculation examples and emulations.Study on error processing model included three dimensions,which were satellite's own error correcting models,ionospheric delay and tropospheric delay correcting models.The correctness of the model calculation can be verified through examples and emulation analysis.And different characteristics of the each model can be obtained by comparison analysis.Navigation solution processing section sdudied the solving of overdetermined equations and nonlinear equations and autonomous integrity detection of receiver,which included the principles of least square method and the application of Kalman Filter in the positioning algorithm and integrity monitoring algorithms commonly used.By the end of the paper,based on the general design of the software architecture and the design of each function module,the whole process for navigation solution can be implemented by software,and visual positioning results can be obtained.