【作者】 杨林；

【导师】 杨莘元；

【作者基本信息】 哈尔滨工程大学 ， 通信与信息系统， 2004， 硕士

【摘要】 自适应阵列方向图综合方法是利用自适应天线的特性，应用自适应算法进行天线权值的设计。本文主要研究的工作是，分析各种自适应算法，讨论自适应线阵和圆阵的特性。在传统综合方法的基础上，采用一种自适应算法对均匀线阵进行方向图综合，然后再将阵元特性考虑在内，对两种情况分别进行了仿真。 首先，本文对阵列天线综合方法进行了简要的论述，指出方向图综合的基本要素。然后讨论了几种传统的自适应算法，分别对其均匀线阵和圆阵进行了仿真，结果很好的显示了自适应线阵和圆阵抗干扰特性，并通过比较得出其自身的优缺点和应用范围，可知圆阵在扫描范围上有着线阵不可比拟的优势。随后又简单介绍了两种传统的综合方法，契比雪夫综合法和泰勒综合法，可以了解传统算法存在着很多不足。最后提出了一种自适应阵列综合算法，此算法设计的最佳权值利用DMI算法的结果，能任意控制旁瓣电平，克服了传统算法的不足，只需要很少的计算时间，具有广泛的应用范围，两种情况的仿真结果都很好的实现了设计要求。更多还原

【Abstract】 The pattern synthesis method for adaptive arrays uses adaptive arrays’ characteristic and applies adaptive algorithm to design the arrays’ weights. The main research work of the paper is that in this, several adaptive algorithms are analyzed and the characteristic of adaptive linear arrays and circular arrays is discussed. On the traditional pattern synthesis method base, the paper adopts a adaptive algorithm to synthesize uniform linear arrays and then thinks elements whose patterns are different. Two conditions are simulated separately.At first, The paper illuminates simply pattern synthesis method for arrays and shows basic factors of pattern synthesis for arrays. Then, it discusses several traditional adaptive algorithm and simulates uniform linear arrays and circular arrays using them. The result shows anti-jamming characteristic of adaptive linear arrays and circular arrays very well and finds their own’ advantage and shortcoming and applying scope. We know that the circular arrays has the advantages the line array has not in the wider scanning range. Subsequently, two kinds of traditional pattern synthesis means are introduced simply, Chebyshev synthesis means and Taylor synthesis means. We can acquaint that there are many defects in the traditional pattern synthesis means. Lastly, the paper presents a pattern synthesis algorithm for adaptive arrays whose designed weights use the result of DMI algorithm and that can control sidelobe level arbitrarily and overcome traditional means’ shortcoming. It only need quite little compute time and ownsextensively applied scope. Simulating results in two conditions complete the required design very well.更多还原