通信学报 ›› 2014, Vol. 35 ›› Issue (6): 92-99.doi: 10.3969/j.issn.1000-436x.2014.06.012

• 学术论文 • 上一篇    下一篇

基于Farrow结构的恒定束宽时域波束形成器研究与实现

周天1,2,张秉致3,杜伟东1,2,彭东东1   

  1. 1 哈尔滨工程大学 水声技术重点实验室,黑龙江 哈尔滨 150001
    2 哈尔滨工程大学 水声工程学院,黑龙江 哈尔滨 150001
    3 南京船舶雷达研究所,江苏 南京 210003
  • 出版日期:2014-06-25 发布日期:2017-06-29
  • 基金资助:
    国家自然科学基金资助项目;中国高等学校博士点基金资助项目

Rearch and implementation of constant beamwidth time-demain beamformer based on Farrow structure

Tian ZHOU1,2,Bing-zhi ZHANG3,Wei-dong DU1,2,Dong-dong PENG1   

  1. 1 Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
    2 College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
    3 Nanjing Marine Radar Institute, Nanjing 210003, China
  • Online:2014-06-25 Published:2017-06-29
  • Supported by:
    The National Natural Science Foundation of China;The Ph.D. Programs Foundation of the Ministry of Education of China

摘要:

提出了一种基于 Farrow 结构的恒定束宽时域波束形成器,主要包括实现整数倍采样间隔延迟的数字延时单元、基于 Farrow 结构的高精度分数延时单元以及保证恒定束宽的幅度加权单元;理论分析了该波束形成器的原理,特点和优势;利用计算机仿真验证了该波束形成器的有效性和优越性;在C6748 DSP平台上的移植实现展示了该恒定束宽波束形成器的实现效率及实用性。

关键词: 恒定束宽, 波束形成器, Farrow结构, DSP, 实现

Abstract:

A new constant beamwidth time-domain beamformer based on Farrow structure filter was proposed, which consists of a digital delay unit to achieve time delay of integral times sampling interval, a high-precision fractional delay filter unit implemented by Farrow structure, and an amplitude weighing unit to ensure constant beamwidth. First, princi-ples, features and advantages of the proposed beamformer was analyzed theoretically. Then its validity and superiority was proved via computer simulation. Finally, its good efficiency and practicability in realtime implementation was tested on C6748 DSP.

Key words: constant beamwidth, beamformer, Farrow structure, DSP, implementation

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