基于嵌套阵的宽频带恒定束宽快速处理算法  

Fast algorithm on constant beamwidth beamformer for nested array over a wide bandwidth

作　　者：陈守虎[1] 赵连军[2] 安琳[3] 肖迪[1] 吴国清[1] 

机构地区：[1]中国科学院水声环境特性重点实验室,北京100190 [2]山东理工大学计算机科学与技术学院,淄博255049 [3]山东理工大学农业工程与食品科学学院,淄博255049

出　　处：《应用声学》2014年第5期377-384,共8页Journal of Applied Acoustics

摘　　要：针对宽频带阵列信号处理中的恒定束宽波束形成问题,本文首先分析了几种常见的实现方法,然后重点介绍了基于嵌套阵的组合滤波算法,并指出该算法在多倍频程实时处理应用中面临计算资源不足的限制。本文的重点是在分析原有算法的基础上,对基于嵌套阵的组合滤波算法提出了一系列的改进,改进后的算法在保证精度的前提下,对七倍频程嵌套阵信号的处理时间缩短为原型算法的3.25%。经过试验验证,其处理速度、处理精度以及波束恒定效果都满足设计和使用要求。Harmonic nesting is one of the classic approaches to receive signals with constant beamwidth over a wide bandwidth. Sometimes,the application of harmonic nesting is limited because of its intensive computation from complicated filtering. An improved algorithm on its filtering is introduced in this paper. It cuts down the computation to about 3. 25% of the original algorithm when it is used on a nested array covering 7 octaves. An experiment which proves the efficiency,precision and the constant beamwidth effect of the fast algorithm is also Presented.

关 键 词：宽带恒定束宽波束形成器 嵌套阵 快速处理算法 

分 类 号：TN911.72[电子电信—通信与信息系统]