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�������պ����ѧѧ�� 2004, Vol. 30 Issue (08) :732-734    DOI:
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Performance of smart antenna when coupling and excitation error are considered
Li Miao, Lü Shanwei, Xue Minghua, Zhang Lei*
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ �ڿ�����Ԫ����Ϻͼ������������,����DS/CDMA(Direct Sequence/Code Division Multiple Access)ϵͳ��,�������ߵIJ����γɽ��,��������������бȽ�.ͨ���������ݽ�����Կ���,������Ԫ���Ϊ�벨��������,��ʹ������Ԫ����Ϻͼ������,�������߲���������Ҳ���Զ�׼Ŀ��,�����������ַ�źŵĿ��������������½�,���л����Ӱ��ϴ�,����Ҫ��ֱ���DS/CDMAϵͳ�Ŀ�����������Ҫ�Ƽ�����ЧӦ.
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Abstract�� The 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's 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 beamforming performance of adaptive arrays is more serious. So the mutual coupling should be taken into account in order to improve the performance.
Keywords�� adaptive arrays   code division multiple access   coupling   errors   antenna beams   smart antenna     
Received 2003-05-13;
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About author: �� ��(1977-),Ů,����������,˶ʿ��,seablue lm@yahoo.com.cn.
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����, ����ΰ, Ѧ����, ����.���ǻ���ͼ������ʱ�������߲����γ�[J]  �������պ����ѧѧ��, 2004,V30(08): 732-734
Li Miao, L�� Shanwei, Xue Minghua, Zhang Lei.Performance of smart antenna when coupling and excitation error are considered[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(08): 732-734
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