OFDM系统的包同步算法分析及硬件设计

Analysis and Hardware Design of Packet Detection Problem in OFDM System

针对基于OFDM作为物理底层的调制解调标准,介绍了常用包同步的三种检测算法并给出仿真结果。由仿真结果可知,随着信号输入SNR比的增大或滑动窗累计长度的增加,包检测效果会得到改善。双滑动窗包检测法则是在接收信号能量检测法基础上很好的改进算法.最后,利用FPGA作为核心器件,给出系统的硬件实现方案。

The paper introduces three algorithms of packet detection in OFDM system,and simulates the situations using MATLAB.According to the simulated results,we can know the performances of the packet detection will be better with the SNR and length of the sliding window increase.Double sliding window packet detection improves the character of the received signal energy detection algorithm.At last,we design the hardware system using FPGA.