Hardware Paltform Developedand Key Algorithms Research Of GLONASS Receiver

With the Russian economic potentiality restores year by year and the satellite navigation positioning strengthens day by day, Russia has already started to enlarge investment of technology and funding of the Global Navigation Satellite System (GLONASS).The GLONASS system will realize to cover the global at the end of the 2010 year, can provide all-weather, continuously precise position, speed, time and so on for the users. The GLONASS system will be widely used in the positioning and navigation domain, the GLONASS navigation and the positioning technology will develop toward the high dynamic, the high accuracy, high anti-jamming, and the high sensitivity direction.The GLONASS receiver mainly uses to receive the GLONASS satellite signal and the telegram text, and determines the distance and Doppler shift and so on between the user and satellite by the radio signal,a nd according to the guidance telegram text,c omputing observed satellite's position and velocity, and calculating the user's position and velocity with the pseudo distance computed . Due to the former Soviet Union disintegrated, the GLONASS system is being at the stationary state or half stationary state, makes the system's navigation and the pointing accuracy bad, falls behind far from the GPS system, the GLONASS receiver's research and development also develops slowly. At present, the domestic majority GLONASS receiver carries on the re-development based on the overseas localization module foundation, or unifies GPS to develop the GPS/GLONASS combination receiver, but single GLONASS receiver's development don't have hardly. Along with GLONASSS restoration developed, its status and the importance are prominent day by day, which requests us to study the GLONASS system thoroughly comprehensively, makes the contribution for our country's positioning and navigation.The paper elaborates the GLONASS receiver's principle and the software development's process comprehensively, has given the GLONASS receiver's hardware and the software plan and done more thorough research for the GLONASS essential algorithm it has completed application processing module development and the correlation interface circuit design based on the TI Corporation's TMS320VC54x, and has completed hardware circuit's debugging. Finally it has conducted the detailed research for the GLONASS receiver's signal capture, the tracking, the guidance telegram text parameter extraction, the orbital extrapolation and the fitting, and has carried on the simulation test under the MATLAB platform.