The Research Of Receiving Algorithms Of High-Dynamic GPS Receiver And Resoving Plan

According to the characteristic of GPS signal under the high dynamic environment, the research is concentrating in the receiving algorithms of spread-signal of high-dynamic GPS receiver, which is including PN code acquisition algorithm, code tracking algorithm,carrier tracking algorithm and costas loop algorithm. The plan of receiving algorithms of spread-signal of high-dynamic GPS receiver is advanced. In the field of code acquisition algorithms, several code acquisition algorithms which can be used in high dynamic environment has been researched and compared, the sequential acquisition algorithm in GPS is advanced and the FFT algorithm in GPS is researched. Eventually, FFT acquisition has been chosen as the ideal GPS signal acquisition algorithm. In the field of code tracking algorithm, according to high dynamic environment, the code tracking algorithm which can separate carrier has been used and researched its performance in GPS, and made a complicated system mode by Matlab, analyzed its code loop paramter.In the field of carrier tracking loop, the CPAFC loop has beened used,researched and made a model by Matlab. A costas loop model is also made. Through a series of research, the plan of hardware which is related with the algorithms above has been advanced and experiments have been made according to current condition.