基于CNYFR的宽带信号接收技术研究  

Research on Wideband Reception Technology Based On CNYFR

作　　者：常安琪 徐伟[1] CHANG Anqi;XU Wei(Xi'an Electronic Engineering Research Institute, Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2020年第2期74-79,共6页Fire Control Radar Technology

摘　　要：Nyquist折叠接收机(NYFR)突破了奈奎斯特采样定理的限制,通过单片ADC均匀采样完成了信号的超宽带接收。本文在NYFR的基础上,以单频信号和线性调频信号(LFM)为研究对象,分析了编码式NYFR的数学模型,主要包括本振信号构建、Nyquist区域(NZ)估计和时频分布检测,从而得出了不同信噪比条件下雷达信号的载频估计。Breaking through the limitation of Nyquist sampling theorem,Nyquist folding receiver(NYFR)achieved the wideband reception of signal through single-chip uniform sampling.Based on the foundation of NYFR,this paper researched on Single Frequency signal and Linear Frequency Modulation(LFM),and analyzed the mathematical model of CNYFR,which mainly includes local oscillator signal construction,Nyquist zone estimation and Time-frequency distribution detection.Hence,the frequency estimation of radar signals is obtained.

关 键 词：Nyquist折叠接收机 超宽带接收 编码式NYFR Nyquist区域 

分 类 号：TN957.5[电子电信—信号与信息处理]