基于数字频率合成技术的雷达数字接收机设计.pdf

第 卷 第 期 吉首大学学报（自然科学版） 25 1 Voi .25 No . 1 2004 年 月 （ ） 3 Journai of Jishou University Naturai Science Edition Mar .2004 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ： （ ） Article ID 1007 - 2985 2004 01 - 0063 - 04 The Key Design Technology of Radar Digital Receiver Based on DDS ， 1 1 2 1 ， ， GAO Yu-iiang WANG Bing-gie ZHU Yuan-ging （ ， ， ， ； 1. Dept . of Microwave Engineering Air Force Radar Academy Wuhan 430010 Hubei China ， ， ， ） 2 . Schooi of Eiectronic Information Engineering BUAA Beijing 100083 China ： （ ） （ ） Abstract AFC Automatic Freguency Controi is reaiized with technoiogy of DDS Direct Digitai Synthesis and high accuracy fre- ， guency measurement guadrature doubie channei receiver is made up of circuits of IF guadrature sampiing directiy and coherent sampiing ciock reaiized with DDS . By doing so， the effect of aii kinds of unstabie factors such as freguency shift and the iimits piaced by anaiogy cir-