Abstract:According to the characteristics of GLONASS satellite signal and the principles of PR code acquisition, the acquisition of GLONASS signal using parallel code phase acquisition algorithm based on FFT are simulated in MATLAB, on the basis of simulation platform established in MATLAB, the FPGA implementation of GLONASS PR code signal acquisition system based on the parallel code phase acquisition is designed; Meanwhile, the Sinc data interpolation filter is used to implement the precise data interpolation to satisfy the demand for FFT transformation by interpolating the inputted 62000 points to 4096 points which is transferred to FFT-IFFT module, and in order to reuse the FFT core, the method of accelerating the read speed of the C/A code and the method of using the state value of the FSM and the exponent of the data to intercept the data bits are used. At last the whole acquisition module are verified by the simulation of Xilinx’s ISE calling ModelSim software. The simulation results show that the system can acquire the GLONASS signal. It is concluded that the designed system can satisfy the requested function and performance of receiver system, and can be used in the real-time GLONASS receiver system.