论文部分内容阅读
文中介绍了一种应用于移动环境中的基于训练序列的 OFDM 载波频偏估计与补偿算法,重点给出了该算法的 FPGA 高速实现方案。方案分3个功能模块,其中小数倍频偏估计利用时域相关完成,整数倍频偏估计在频域通过循环移位搜索实现,频偏补偿采取时域相位旋转的方法。在 Xilinx 的 FPGA 上进行的仿真验证了方案的可行性。
In this paper, an OFDM carrier frequency offset estimation and compensation algorithm based on training sequence is introduced in mobile environment, and an FPGA high-speed implementation scheme is given. The scheme is divided into three functional modules, of which the fractional frequency offset estimation is completed by time domain correlation, the integer frequency offset estimation is implemented by cyclic shift search in the frequency domain, and the frequency offset compensation adopts the method of phase rotation in the time domain. The simulation on Xilinx’s FPGA validated the feasibility of the solution.