考虑互耦和激励误差时智能天线波束形成  

Performance of smart antenna when coupling and excitation error are considered

作　　者：李苗[1] 吕善伟[1] 薛明华[1] 张磊[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《北京航空航天大学学报》2004年第8期732-734,共3页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目 ( 60 2 710 12 )

摘　　要：在考虑阵元间耦合和激励误差的情况下 ,讨论DS CDMA(DirectSe quence CodeDivisionMultipleAccess)系统中 ,智能天线的波束形成结果 ,并与理想情况进行比较 .通过仿真数据结果可以看出 ,对于阵元间距为半波长的线阵 ,即使存在阵元间耦合和激励误差 ,智能天线产生的主瓣也可以对准目标 ,但其对其它多址信号的抗干扰能力有所下降 ,其中互耦的影响较大 ,表明要充分保持DSThe performance of smart antenna in DS/CDMA (direct sequence/code division multiple access) systems is investigated when there are mutual coupling and/or excitation error which is compared with that in ideal situations. As an example, it is shown from the simulation that for adaptive arrays with half-wavelength spaced elements even there exist mutual coupling and/or excitation error, the radiation pattern main beam can still point to the arrival direction of the desired signal. However, the interference cancellation ability decreases in some degrees and the effect of mutual coupling between array elements on the beam forming performance of adaptive arrays is more serious. So the mutual coupling should be taken into account in order to improve the performance.

关 键 词：自适应阵 码分多址 耦合 误差 天线波束 智能天线 

分 类 号：TN821.91[电子电信—信息与通信工程]