摘要
在远场目标的假设前提下,讨论了双线阵中的波束形成方法。首先,建立双线阵模型,其中使用了克拉美—罗下界分析其性能极限。然后,分析了延时相加波束形成(即平面阵波束形成)和延时相减波束形成,并讨论了模型失配的影响和处理,随后给出实际声纳系统中的处理流程。最后,给出采用这两种波束形成方法的海试数据的方位历程图。结果表明,实验结果与理论分析符合良好。
This paper studies the beamfoming methods considering signals from far-field sources with a dual-line array. The Cramer-Rao technique is used to set a lower bound on the performance error. Then the delay-sum and delay-subtract beamforming are analyzed and the effects of unmatched models are also discussed. A signal processing diagram is presented subsequently, and sea trial results are shown using these two beamforming methods and the results are coincidence with the theoretical analysis.
出处
《信号处理》
CSCD
北大核心
2007年第3期398-402,共5页
Journal of Signal Processing
基金
声纳技术国防科技重点实验室"阵元位置不确实条件下阵处理技术研究"项目资助
编号:51446070204ZK0204
关键词
克拉美-罗下界
双线阵
波束形式
Cramer-Rao Lower Bound (CRLB)
Dual-line array
Beamforming