一种新的相位差精确测频法研究

提出了一种基于长短时延匹配的相位差测频方法，该方法借鉴了长短基线干涉仪测向原理，利用短时延相位差测量解决相位混叠的问题，长时延相位差测量提高测频的精度．对长短时延的匹配选取、多信号的测频能力以及抗噪声性能进行了理论分析和仿真试验，结果表明，与其他方法相比，新方法适应能力强、运算量小、精度高，在低信噪比下仍具有良好的估计精度和频域稳定性，适于硬件实现．

A new and accurate frequency estimation approach based on the phase difference

A method for estimating the frequency of signals based on the phase difference between long and short delay matches is proposed. This method uses the interferometer direction finder principle for reference, that is, small frequency offset estimation by measuring the interframe phase difference of the short delay is used to resolve the indistinct phase problem, and at the same time, estimation by long delay is used to improve precision. A great deal of simulation for various algorithms shows that the new algorithm not only has a good estimation accuracy, but also has a good frequency stability, which can be utilized for hardware implementation of the receiver system.