非圆信号虚拟阵列波束形成算法

利用非圆信号的实值特性,提出了一种利用信号共轭扩展阵列孔径的虚拟阵列构成方法,将其应用在自适应波束形成中,对其波束形成的性能进行了分析和改进,并提出了一种快速的实现方法。该虚拟阵列的构造方法能同时保留时间信息和方位信息,用于自适应波束形成中,可以改善波束图形状,提高阵列增益,对抗超自由度干扰。计算机仿真验证了该方法的优越性。

Virtual array beamforming algorithm for non-circular signal

Based on the real-value characteristic of the non-circular sources,a new virtual array beamforming method is proposed.The method firstly extends the original array utilizing the conjugate data of the real array and then applies the extended virtual array to adaptive beamforming.By analyzing the performance of the virtual array,some improvements are made and a computation saving method is proposed,which makes it more applicable for adaptive beamforming.The virtual array provides much better performance,such as better beam pattern,higher array gain and the ability to restrain interferes more than the freedom degree.Several computer simulations illustrate the advantages of the proposed method.