基于子带最大信干噪比准则的宽带发射ADBF研究

Wideband transmitting ADBF based on subband MSINR criterion

研究了宽带发射自适应数字波束形成(ADBF)算法,首先使用分析滤波器组将每个阵元宽带发射信号划分为子带信号,并基于最大信干噪比(MSINR)准则计算每个子带信号阵列ADBF权矢量,最后使用综合滤波器形成宽带发射自适应波束。理论分析和仿真实验表明,本文算法能有效校正宽带信号孔径渡越效应,在干扰方向形成深凹口,且算法运算量较小,易于工程实施。

This paper describes the algorithm of wideband transmitting adaptive digital beamforming(ADBF).Firstly,we use the analysis filters to partition the wideband transmitting signal into independent subbands and the ADBF weight vector of each subband is computed by the maximum signal-to-interference-plus-noise-ratio(MSINR)criterion.Finally,the wideband transmitting adaptive beam is synthesized through the synthesis filters.Theoretical analysis and simulation experiments show that the proposed algorithm can effectively calibrate the aperture crossing effect of wideband signal and form deep nulls in the directions of the interferences.In addition,this algorithm has less computation and is efficient in engineering implementation.