Design and Implementation of Beidou B1I Signal Code Module on FPGA

The code moudle of Beidou B1Isignal was designed based on FPGA technology,and the working principle,parameter design of the module and the detailed design of each module were described.The code NCO,the code generate and the code slipping were designed by using modular design.All the designs of code module were implemented in Verilog language on FPGA.The simulation results show that Beidou B1Isignal can be generated efficient by this metoil.The error of code tracking frequency is 9mHz.The code phase error is 1/2chip.It shows that the positive result laid a good foundation for the development of correlator chip of Beidou receiver.