一种基于DFT的高精度载波频偏估计算法  

A High-Precision Carrier Frequency Offset Estimation Algorithm Based on DFT

作　　者：朱乾坤[1] 许阳[2] 刘东鑫[1] 于德海[1] 

机构地区：[1]海军航空工程学院训练部 [2]91372部队

出　　处：《海军航空工程学院学报》2014年第4期329-334,共6页Journal of Naval Aeronautical and Astronautical University

摘　　要：针对无线数字通信中的载波频率同步问题,提出一种新的载波频偏估计算法。利用离散傅里叶变换(DFT)内插技术,在较大频偏范围内估计出载波频偏,并且在估计精度上相对于DFT法有了很大的提高。这种算法不需要增加DFT数据长度,适合突发通信方式。进行了MonteCarlo仿真实验,仿真结果表明新算法不仅具有宽的估计范围,还具有高的估计精度。According to the problem for the carrier frequency synchronization in wireless digitM communications, a new carrier frequency offset estimation algorithm was proposed. Using the discrete fourier transform （DFT） interpolation technique, the carrier frequency offset was estimated in a wide frequency offset range, and the estimation accuracy was greatly improved, relative to the DFT. This algorithm does not increase the DFT data length for burst work. Finally, a Monte Carlo simulation experiment was done, and the simulation results showed that the new algorithm not only had a wide range of estimates, but also had high estimation accuracy.

关 键 词：载波同步 频偏估计 突发同步 DFT算法 

分 类 号：TN925[电子电信—通信与信息系统]