采用自适应信号处理技术的低成本回波抵消器  

A Cost Effective RF Front End with Adaptive Reflected Power Canceller for CW Radar

作　　者：赵洪新[1] 殷晓星[1] 孙忠良[1] 

机构地区：[1]东南大学毫米波国家重点实验室,南京210096

出　　处：《现代雷达》2008年第10期82-85,共4页Modern Radar

基　　金：国家自然科学基金委创新群体基金项目(60621002)

摘　　要：提出了一种低成本回波抵消电路方案,采用了自适应信号处理技术,可用于连续波雷达系统中的射频收发前端,能改善载波泄漏和收发隔离度指标,从而提高接收机前端的动态范围。仿真结果表明,在采用环形器作为收发隔离器件的典型应用条件下,采用回波抵消电路后,前端可以获得57 dB以上的收发隔离度改善。该电路结构简洁、算法运算量小、载波抑制特性稳定、收敛迅速,而且对器件指标的要求并不苛刻,有利于提高系统的经济性。A cost effective RF front end to be used in continuous-wave(CW)radar system is proposed.Carrier leakage suppression and TX/RX isolation are improved by adoption of RPC(Reflected Power Cancellation)technique to adaptive signal processing.The simulation results show that more than 57 dB improvement with TX/RX isolation as well as the dynamic range of re- ceiver can be achieved under typical application conditions with circulator as the isolation device.The concept of the circuit is sim- ple with simplified al...

关 键 词：自适应信号处理 连续波雷达 回波抵消 射频前端 

分 类 号：TN958.94[电子电信—信号与信息处理]