一种适用于高动态超视距突发信道的频偏估计方法

Research on a Method of Frequency Offset Estimation for High Dynamic BLOS Burst Channel

针对通信系统在高动态超视距突发信道条件下难以实现准确快速的频偏估计问题,提出了一种基于分集措施的FFT频偏估计方法,该方法在实现快速频偏估计的同时,估计精度亦可满足通信系统解调需要。对其基本原理及实现方法进行了简要介绍,并进行了Matlab仿真及室内测试。仿真及测试结果表明,该方法的频偏估计误差与FFT的频率分辨率是相吻合的,验证了该方法的可行性。

To solve the difficult problems of estimating the frequency offset accurately and rapidly under the high dynamic BLOS burst channel in communication systems,a method of frequency offset estimation using FFT based on diversity technology is proposed. Not only can the estimating of the frequency offset be quickly realized, but also the accuracy can meet the requirement of demodulation. The basic principle and implementation scheme of the method are briefly introduced.The simulation of this method in Matlab and the test on the hardware platform are conducted.The results of simulation and the experiment data processing validate that the estimation error is consistent with the frequency resolution of FFT and the feasibility of the method is verified.