基于循环前缀的OFDM同步算法研究与FPGA实现

An OFDM synchronization algorithm based on cyclic prefix and FPGA implementation

提出了一种基于循环前缀的符号同步算法。此算法在最大似然估计的基础上加以改进,简化了符号同步中相关运算的判决方法,在保持同步效率的同时,极大地节约了硬件资源,使算法更易于硬件实现。改进算法基于IEEE 802.11a的标准提出,通过Matlab仿真分析其性能,并在FPGA硬件平台上实现,利用ChipScope观测得到波形。实验结果表明,电路系统工作可靠,满足设计要求。

This paper presents a kind of symbol synchronization based on cyclic prefix. This algorithm based on ML estimation algorithm, improve and simplifies symbol synchronization method in the operation, not only optimises the system in hardware re- sources, but also improves the performance of estimation. By simulating in Matlab and implementing in FPGA based on the IEEE 802.11a,we successfully further verified the feasibility of the algorithm. The results show that the system is reliable and can meet the design requirements.