摘要
阐述了雷达中频采样的原理和数字I/Q解调算法,分析了各种解调算法的优点与局限性,重点讨论了低通滤波数字下变频的实现方法及性能,分析了其性能及A/D位数对镜频抑制比的影响。
This paper describes the principle of radar intermediate frequency（IF） sampling and digital I/Q demodulating algorithm,analyzes the advantage and limitations of all kinds of demodulating algorithms, mainly discusses the realization method and performance of digital down convert based on low pass filter,analyzes the influence of its performance and the A/D digit on the mirror frequency suppression ratio.
出处
《舰船电子对抗》
2008年第1期92-94,共3页
Shipboard Electronic Countermeasure
关键词
数字接收机
低通滤波
中频采样
digital receiver
low pass filter
intermediate frequency sampling
