On the base of analyzing the theory of synchronization of GSM systems in the initial cell search

this paper puts forward one downlink synchronization algorithm of GSM based on FFT and high realtime performance concrete implementation scheme using FPGA to realize GSM coarse synchronization and fine synchronization.Then this paper uses Modelsim and MATLAB simulating the program to verify algorithm correctness.Finally it finishes the debugging on board of Altera Cyclone III FPGA chip to verify the real-time data

and the result shows the synchronization algorithm feasible

more real-time and higher stability.