突发OFDM接收机同步算法研究与实现

Research and implementation of synchronization in burst OFDM receiver

根据突发OFDM系统的特点,提出了一种具有实用价值的OFDM帧同步方法。在经典SC算法的基础上,提出了改进型SC算法和基于时域PN序列的改进型SC算法。对这两种算法进行了仿真对比,仿真结果表明基于时域PN序列的SC算法能够实现突发帧的精同步,而改进型SC算法只能实现粗同步。但是改进型SC算法更适合FPGA实现,采用Verilog HDL语言,在Quartus Ⅱ上完成开发,同时给出了其在ModelSim 6.5b下的仿真结果,结果表明,方案是完全可行的。

According to the characteristics of burst OFDM system, a practical OFDM frame synchronization method is proposed. An improved SC algorithm and modified SC algorithm based on the time domain PN sequence are proposed based on the classic SC algorithm. Simulation results show that SC algorithm based on the time domain PN sequence can achieve fine synchronization, but improved SC algorithm can only achieve coarse synchronization. However, improved SC algorithm is more suitable for FPGA implementation using Verilog HDL language The development and simulation are fulfilled, and the results show that the program is completely feasible.