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在分析空时自适应处理结构的基础上,提出了一种工程上易于实现的低旁瓣波束形成算法。虚拟了不同幅度、不同频点、不同方位角的干扰源,使得空时二维方向图的主瓣指向期望信号来波方向的同时,在其他方向上形成低旁瓣,达到抑制干扰和噪声的目的。由于此算法权值是已知系数矩阵与当前时刻期望信号的空时二维导向矢量的乘积,计算量简单,避免了传统线性约束算法中多次矩阵求逆的复杂运算,既保证了抗干扰性能又便于工程实现。
Based on the analysis of space-time adaptive processing structure, a low-sidelobe beamforming algorithm that is easy to implement in engineering is proposed. The interference sources with different amplitudes, different frequencies and different azimuths are virtualized so that the main lobe of the space-time two-dimensional pattern points to the direction of the desired signal and forms low sidelobes in other directions to suppress the interference and noise purpose. Since the weight of this algorithm is a product of the space-time two-dimensional steering vector of the known coefficient matrix and the current time desired signal, the calculation amount is simple and avoids the complicated operation of the inverse of multiple matrices in the traditional linear constrained algorithm, which not only ensures the anti-interference Performance and easy to project.