Research On Spread Spectrum Ranging System

Spread spectrum ranging system has advantages of anti-jamming and high precision, At present it is mainly used in satellite telemetry and telecommand system. Satellite ranging plays a very important role in satellite tracking, orbit measurement, the initial capture of the satellite positioning. With the coming of the information age, spread spectrum communication is now widely used in digital cellular mobile communications, satellite communication and mobile personal communications in the future.This thesis recommend the principle of Spread Spectrum Ranging at first and make a brief introduction to four kinds Pseudo code ranging method. A detailed analysis is done about the advantages and disadvantages of specific telemetry and telecommand system. Spread spectrum measurement System of the pseudo-code-related capture and filter capture, sliding catch single integral system, dual sliding catch integral system. Acquisition time, false alarm probability of detection probability is a measure of pseudo-random code capture the important technical indicators, the thesis on the two-way sliding catch of acquisition time, false alarm probability of detection probability were analyzed and calculated.At present, the satellite positioning location methods have been more mature .In our country, we can't rely on foreign satellite constellation to the satellite location, positioning and tracking but relies mainly on satellite ground stations to achieve the autonomous positioning. The application of pseudo code ranging is not very extensive, so the research on Spread Spectrum Ranging is a very important significance to the realization of satellite ranging, positioning in our country.