一种实时欠采样数字测频技术研究  

Research on Real Time Sub-Sampling Digital Frequency Measurement Technique

作　　者：张华娣[1] 

机构地区：[1]中国电子科技集团公司第三十六研究所

出　　处：《通信对抗》2011年第1期10-13,共4页Communication Countermeasures

摘　　要：提出一种宽带实时欠采样数字测频结构模型。该誉型由相同采样频率的带I／Q通道的ADC及其延时共四个通道组成。根据并行的快速傅里叶变换的频域结果进行频率测量，其中欠采样所引入的频率模糊由延迟与非延迟通道之间产生的相位差进行解模糊。该方法具有瞬时测频带宽大，测频速度快，能同时对多信号进行处理的特点。This paper present a model of a real time wide-band sub-sampling digital frequency measurement. This model is made up of the quadrature sampling ADC with the same sampling frequency and their delayed I/Q channels, total of four ADC. The frequency is measured by the parallel processing FFT spectrum. The Frequency ambiguity introduced by sub-sampling is solved by the phase difference of the non-delayed channel and the delayed channel. This method has the characteristics of wide-band and high-speed frequency t and the ability of multi-signal processing.

关 键 词：欠采样 测频 相位差 解模糊 

分 类 号：TN934[电子电信—信号与信息处理]