一种基于 ST FT 的欠采样测频技术

在现代电子战中，数字测频技术的发展至关重要。对短时傅里叶变换（STFT ）数字信道化技术进行了原理分析和理论仿真，然后研究了欠采样技术，并提出了将STFT 信道化与欠采样结合使用的测频方法，并以正交双通道延迟解模糊为例，仿真验证方法的可行性。

A Sub-sampling Frequency Measurement Technique Based on STFT

In modern electronic warfare ,the development of digital frequency measurement technique is very important .T his paper performs the principle analysis and theory simulation to short time Fourier transform (STFT) digital channelization measurement technique ,then studies the sub‐sam‐pling technique ,and puts forward the frequency measurement method combining STFT channeliza‐tion technique with sub‐sampling technique ,and taking orthogonal dual‐channel delay ambiguity resolution as an example ,validates the feasibility of the method through simulation .