非合作无源探测系统接收机设计  

Receiver Design for Non-cooperative Passive Detection System

作　　者：刘志强[1] 马红光[1] 杨利锋[2] 

机构地区：[1]第二炮兵工程学院一系,西安710025 [2]中国电子科技集团29所,成都610036

出　　处：《数据采集与处理》2008年第3期372-376,共5页Journal of Data Acquisition and Processing

基　　金：国防基金(51435100104ZS0502)资助项目

摘　　要：提出采用射频模拟对消的非合作无源探测新接收机体制。在该体制下,需要用衰减器与移相器处理参考信号,使之在采样前与接收天线接收到的直达信号进行对消,以减小量化噪声提高系统的探测能力。本文推导了参数调节算法,并讨论了器件不理想因子已知与未知两种情况下的消除方法,证明了在器件不理想因子未知情况下采用迭代方法确定的参数最终收敛于不理想因子已知情况下的参数。同时给出了使用实际器件时该接收机系统对直达信号的抑制能力。理论与仿真结果表明,与传统接收机系统相比,采用该接收机系统能通过后续数字信号处理方法实现更弱目标的检测。A novel receiver system for non cooperative passive detection is proposed and the analogue cancellation of the radio frequency is used. In the system, the reference signal is processed by the attenuator and the phaser before sampling to cancel the direct signal from the received antenna, so that the quantizing noise power is reduced and the detection capability is enhanced. The parameter adjust algorithm is also deduced. The canceling methods are discussed when the unideal factor of the device is known or unknown. The result proves that when the unideal factor of devices is unknown, the parameter solved by the iteration is convergent to that when the unideal factor is known. The capability of receiver system restraining the direct signal is also discussed when the receiver adopts actual devices. Compared with the traditional receiver system, theoretical and simulation rersults of the receiver system can detect the weaker target by the follow-up digital signal processing.

关 键 词：接收机 非合作 无源探测 量化噪声 目标检测 

分 类 号：TN957[电子电信—信号与信息处理]