一种基于DFT的高精度载波频偏估计算法

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Monte Carlo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。

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

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.