摘要
针对常规波束形成器的方向图旁瓣过高的问题,建立了天线阵列对信号的接收模型。对基于线性约束最小方差(Linear Constrained Minimum Variance,LCMV)准则的波束形成器性能进行了分析,提出了一种基于多约束LCMV的旁瓣抑制方法。通过搜索寻找到降低旁瓣级和主瓣展宽程度的多约束条件,并将求得的加权向量投影到基于特征结构的投影矩阵上。对该算法进行了计算机仿真,验证了算法的可行性,并分析了仿真结果,指出了算法的优点与不足。
To solve the problem that the regular beamformer may make too high sidelobe,the model is set up to describe the interception of signal by antenna array,the performance of beamformer based on linear constrained minimum variance（LCMV） criterion is analyzed,and a new algorithm of sidelobe suppression is presented based on multi-linear LCMV.The multi-constraint condition of suppressing the sidelobe level and controlling the main beamwidth is found by searching.The derived weight vector is projected to the projection matrix based on eigenstructure.At last,the simulation experiment is carried out and the algorithm is proved to be available,the result is analyzed and the evaluation of the algorithm is given.
出处
《无线电工程》
2011年第7期33-35,共3页
Radio Engineering
关键词
方向图
旁瓣抑制
LCMV
特征结构
antenna array pattern
sidelobe suppression
LCMV
eigenstructure
