Research And Implementation Of Satellite-borne Dual-mode Satellite Navigation Receiver

With the continuous development and improvement of the satellite navigation system, the development of space-borne satellite autonomous navigation and space-borne multi-system compatible satellite navigation receiverreceiver has become an important research direction of the satellite navigation system. The satellite receiver with dual mode compatible performance has been widely concerned in the field of aviation and space.The receiver of this project is a GPS/BDS dual mode compatible, satellite navigation receiver with high dynamic performance, and the receiver also has the function of fast acquisition,wide doppler search Stable tracking, hot start and self integrity detection.In this paper, based on the theory, combined with the actual research and development process, this paper discusses in detail the implementation of the satellite borne dual mode satellite navigation receiver. The whole project design is based on FPGA+DSP hardware platform, the overall structure is divided into three parts, radio frequency, baseband signal processing, navigation information processing. The RF part is mainly composed of power divider and custom chip MAX2769 to complete the GPS and BDS RF signal down to the if function. FPGA mainly completes the acquisition and tracking of satellite signals. DSP mainly to complete the frame data frame, capture and tracking control strategy, select the star, PVT solution, space coordinate conversion and other main functions. In this paper, the design and implementation of the receiver capture, tracking algorithm, satellite orbit correction algorithm, positioning theory and algorithm, the receiver design, performance analysis, and other aspects of the situation.During the designing, by using SPRIENT simulator simulated low earth orbit satellite scenes to verify all of the algorithm and scheme design. By comparing the simulated low earth orbit satellite scenes and location data of receiver to verify the availability of scheme design, satisfy the design index requirements...