摘要
讨论信号方向偏离约束方向(即信号方向误差)对线性约束自适应阵性能的影响.把输出信噪比看作是信号方向和输入信噪比的函数,研究了输出信噪比同信号方向和输入信噪比的关系.通过分析,结果发现在一定的输入信噪比下,要求的输出信噪比越大,信号方向误差就应越小;对具有一定方向误差的信号,输入信噪比越大,有用信号受到的抑制就越厉害;当干扰信号存在时,阵对信号方向误差的敏感度减少.
This paper discusses the performance variations of linearly-constrainedadaptive arrays when the actual signal direction is deviated from the constrained direction(thedeviation is defined as signal direction error).The output signal to interference-plus-noise ratioSINR_(out) is formulated as the function of signal direction θ~d and input signal to noise ratioSNR_(in).Then the relations between SINR_(?),θ~d and SNR_(in) are studied.After thorough analy-sis,it is found that(1)for certain SNR_(in),the larger the desired SINR_(out) is,the smaller the di-rection error should be;(2)for some direction error,the desired signal is suppressed badlywhen SNR_(in) becomes larger;(3)with interference signal present the array is less sensitive tosignal direction error.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1991年第3期225-230,共6页
Journal of University of Electronic Science and Technology of China
基金
机电部应用基础研究基金
关键词
信噪比
自适应算法
天线阵
误差
adaptive algorithm
antenna array
linear constraints
signal-noise ratio
adaptive array
