宽带接收和高精度被动跟踪伺服跟踪系统  

High Accuracy Servo Track System Based on Pulse Compress Receiver

作　　者：张忠敏[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《信息与电子工程》2006年第3期225-228,共4页information and electronic engineering

摘　　要：为了对星载合成孔径雷达进行侦察和跟踪,在雷达侦察设备中使用了压缩接收机。通过介绍压缩接收机的基本原理,推导出采用脉压接收机后雷达侦察接收机的信噪比将改善D倍,因而灵敏度也改善了1D倍,并且推出跟踪误差电压与目标偏角θ的数学模型。同时,分析了雷达侦察接收机灵敏度提高和角跟踪死区减小1D倍的机理,得出在雷达侦察中采用压缩接收机可提高侦察距离和提高角跟踪精度。The compress receiver is used for the tracking and reconnaissance to spaceborne SAR. In this paper, the principium of the compress receiver is introduced firstly, then the conclusion is deduced that the SNR of radar reconnaissance receiver with the compress receiver can be ameliorated by D times, thus its sensitivity can be ameliorated by 1/D. The mathematic model of track-error voltage and target-deflection angle is deduced as well. The analysis results indicate that using the compress receiver in receive system can improve receiver sensitivity, play down track-error check circuit＇ s gate-limit level and death-size angle. As a result, it can improve angle-track precision and radar reconnaissance distance.

关 键 词：雷达工程 高精度角跟踪 压缩接收机 瞬时带宽 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]