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宽带自适应波束形成方法较常规延时求和波束形成方法具备更好的空间分辨能力和干扰抑制能力,但在实际应用中由于阵列误差和指向误差影响导致性能下降。文中在宽带指向最小误差(STMV)方法和窄带稳健Capon(RCB)方法基础上,提出了一种基于椭圆不确定集的宽带稳健波束形成方法。通过仿真验证分析了算法在强副瓣干扰和指向误差条件下弱目标检测能力;在幅频响应误差影响条件下的保持弱信号功率输出能力;并验证算法对快拍数要求低于STMV方法。
Broadband adaptive beamforming method has better spatial resolution and interference suppression than the conventional delay-sum beamforming method, but its performance is degraded due to the influence of array error and pointing error in practical applications. In this paper, a robust broadband beamforming method based on elliptic uncertainty set is proposed based on the method of wideband pointing error (STMV) and narrowband robust Capon (RCB). The weak target detection ability under strong sidelobe interference and pointing error is analyzed by simulation verification. The weak signal power output ability is maintained under the influence of amplitude-frequency response error. The algorithm is also validated that the algorithm requires less snapshot than STMV method.