相参脉冲雷达中频接收方式研究  

IF Receiving Method for Pulsed Coherent Radar

作　　者：蔡飞[1] 范红旗[1] 林华[2] 付强[1] 

机构地区：[1]国防科技大学ATR实验室,长沙410073 [2]中国工程物理研究院电子工程研究所,绵阳621900

出　　处：《数据采集与处理》2011年第4期457-462,共6页Journal of Data Acquisition and Processing

基　　金：国防科技重点实验室基金(9140C08005011009)资助项目

摘　　要：脉冲串接收和脉冲接收是相参脉冲雷达的两种常用的中频采样接收方式,如何选择恰当的接收方式是雷达中频数字接收机设计过程中的一个关键问题。针对该问题,首先通过对接收过程的建模与分析得到了两种接收方式的差异及其等价条件,并分析了非等价情况下两种接收方式对中频采样性能的影响;然后以FPGA实现的中频数字接收机为例,从系统实现角度分析了两种接收方式的约束条件;最后结合这些条件与系统参数,提出了一套相参脉冲雷达中频接收方式的选择方法。相关条件与结论不仅可直接用于相参脉冲雷达中频数字接收机的设计,而且对雷达系统的参数设计具有重要的指导意义。Burst receiving and pulse receiving are two commonly used IF sampling receiving methods in the pulsed coherent radar system, and it is crucial to select one method properly in the design of a radar digital receiver. Firstly, the difference between the two methods and their equivalent conditions are obtained, and the influence on the performance of IF sampling is analyzed when the conditions are dissatisfied. Secondly, taking the implementation of digital IF receiver based on FPGA as an example, the constraint conditions of the two methods are analyzed at the system implementation point of view. Finally, a selecting scheme of the two methods in pulsed coherent radar is proposed in association with the constraint conditions and the system parameters. The conclusions are meaningful both for the design of digital IF receiver and for the selection of system parameters in pulsed coherent radar.

关 键 词：数字接收机 相参脉冲雷达 中频采样 脉冲串接收 脉冲接收 

分 类 号：TP957.5[自动化与计算机技术]