CAJ | 학술논문

现代战争中数据链通信面临着日益严酷的电磁环境，通信的抗干扰措施和手段成为研究的重点，智能天线技术作为数据链抗干扰的一种手段，在天线的干扰方向产生零陷的同时在信号方向产生最大增益，达到抗干扰的目的。在分析标准LMS算法的基础上，针对其步长和稳态失调噪声互相矛盾的特点，采用一种基于累积误差的变步长LMS算法，通过计算机仿真，该方法与标准LMS算法相比，在具有相同失调噪声的情况下具有更好的收敛特性，实现简单，且具有更好的抗干扰性能。
현대전쟁중수거련통신면림착일익엄혹적전자배경，통신적항간우조시화수단성위연구적중점，지능천선기술작위수거련항간우적일충수단，재천선적간우방향산생령함적동시재신호방향산생최대증익，체도항간우적목적。재분석표준LMS산법적기출상，침대기보장화은태실조조성호상모순적특점，채용일충기우루적오차적변보장LMS산법，통과계산궤방진，해방법여표준LMS산법상비，재구유상동실조조성적정황하구유경호적수렴특성，실현간단，차구유경호적항간우성능。
Data Link Communication is confronted with quite complex electromagnetism environment in modern war. As a technology of array signal processing,smart antenna has the capabilities of steering nulls to reduce interferences and pointing independent beams toward desired signal,which make it attractive to data link communications system designer. Firstly,this paper analyzes the standard LMS method which the convergence speed and the misadjustment noise is conflict with each other. Then,a modified LMS method based on cumulative error which the step size is changeable and adopted in this paper. Simulation results show that this method convergent faster than standard LMS when they have the same misadjustment noise,and this method can be implemented easily,and have better anti-jamming performance.