任意结构形状传感器阵方向图的最佳化

本文介绍一种处理传感器阵方向图最佳化问题的新方法,即所谓凹槽噪声场法。这种方法将通过计算机仿真来实现。原理上说,这种方法可以用来计算任意结构传感器阵的最佳权系数矢量和最佳方向图,以满足主瓣方向和宽度的要求,并使旁瓣级为最小。因此这种方法有可能用来解决传感器阵设计、应用中的许多实际问题,例如少数传感器失效、阵的尺寸误差过大,单个传感器的方向图互不一致,以及阵的结构形状复杂等。文中提供了一些计算实例,以说明本方法的优点,包括有一个“随机阵”的方向性设计。

PATTERN OPTIMISATION FOR SENSOR ARRAYS OF ARBITRARY CONFIGURATION

The paper presents a new method used for optimizing array directional patterns, which is called notch noise-field method. It will be realized by computer simulations. In principle, this method can be used to calculate the optimum weight vector and the corresponding pattern of an array of arbitrary configuration under the condition of maintaining a given mainlo-be direction and beam width, while the sidelobe level is minimized. So that, it can be used to solve many problems in array design and applications, e. g. failure of some sensor, too much geometrical error, pattern differences between individual sensors, complex configuration etc. Some examples are provided to illustrate the advantage of the method, including an optimum pattern design of a "random array".