含有用信号的自适应干扰对消系统时域分析  

Time-domain analysis of adaptive interference cancellation system with the desired signal

作　　者：李文禄[1] 赵治华[1] 李毅[1] 唐健[1] 肖欢[1] 

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,湖北武汉430033

出　　处：《通信学报》2012年第10期183-190,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(50721063;50677070)~~

摘　　要：从时域角度对含有用信号的自适应干扰对消系统进行了建模与理论分析,研究了"有用信号损耗"的特性,分析了有用信号损耗与干扰对消比、收敛时间之间的内在联系。为避免有用信号损耗较大,对消系统的反馈电路需工作在欠阻尼状态;给出了欠阻尼状态下,各参数对系统性能指标的影响。实验结果验证了理论分析的正确性,从而为对消系统的优化设计提供了重要的理论依据。A time-domain model for adaptive interference cancellation system （AICS） involving both interference and desired signal was proposed. According to the theoretical analysis, the performances of AICS, such as desired signal can- cellation ratio （SCR）, interference cancellation ratio （ICR） and convergence time, were analyzed in detail. It was found that the AICS feedback circuit should be in the condition of low damping in order to reduce the negative effect of desired signal. The influences of several parameters on the performances of the AICS were obtained. The experimental results are in agreement with theoretical analysis, which is of great value to the optimization design of the AICS.

关 键 词：自适应干扰对消 有用信号损耗 干扰对消比 收敛时间 欠阻尼 

分 类 号：TN911.4[电子电信—通信与信息系统]