Design and Implementation of Dual-Channel and Dual-Mode Timing Module Based on Beidou & GPS

Against the Status quo that satellite timing service in many fields of China mainly relies on the GPS system, for full use of the Beidou navigation satellite system with our own intellectual property, this paper presented a chip-level solution of dual-channel and dual-mode timing modules based on the Beidou-2 and GPS navigation system. The timing principle of Beidou navigation satellite system was first introduced, and then the hardware design of the timing module was presented with selection of highly-integrated RF chip and baseband processor chip. Furthermore, many kinds of output interfaces were designed to meet diverse service demand. By analyzing the format of the received signal, the flow chart for extracting timing information was also given. Finally, the designed timing module was tested by using the developed timing display system and test results show that the module has a better timing performance.