摘要
给出了多输入多输出(multiple-input multiple-output,MIMO)雷达波束方向图的数学表达式,它为发射和接收方向图的乘积。假设接收阵元为半波长配置,通过分析发射阵元的间隔配置,得出如下结论:当发射阵元为一倍或Mr(接收阵元数目)倍半波长间距时,波束方向图将不会产生高旁瓣;当发射阵元的间距介于两者之间时,波束方向图将会因发射端的栅瓣效应而造成高旁瓣电平。针对后者引起的高副瓣情况,提出了利用接收波束合成算法来对消发射阵元的栅瓣,进而有效地抑制旁瓣。仿真实验验证了理论分析的有效性。
The beam pattern of multiple-input multiple-output(MIMO) radar is derived analytically,which shows that it is the product of transmitter and receiver beam pattern.By assuming that the receiver inter-element is half-wavelength spacing,this paper analyzes the inter-element spacing of the transmitter,and gets the follow conclusion: when the transmitter inter-element is half-wavelength or Mr/2-wavelength spacing(Mr is the transmitter elements),the beam pattern of MIMO radar cannot form the high side-lobe.And when the transmitter inter-element is between half-wavelength and Mr/2-wavelength spacing,the transmitter will form the grating lobe which leads to the high side-lobe in the beam pattern.Furthermore,in order to suppress the high side-lobe,a new pattern synthesis algorithm is used to cancel the grating lobe,which can suppress the side-lobe efficiently.Simulations verify theoretical analysis.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第2期287-290,共4页
Systems Engineering and Electronics
基金
国家自然科学基金(60702015)资助课题
关键词
联合配置多输入多输出雷达
波束方向图
波束合成
旁瓣抑制
colocated multiple-input multiple-output radar
pattern synthesis
beam pattern
side-lobe suppression