A Robust and Efficient Compressed Sensing Algorithm for Wideband Acoustic Imaging

来源 :中国机械工程学报 | 被引量 : 0次 | 上传用户:yoyoluo5531
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Wideband acoustic imaging, which combines compressed sensing (CS) and microphone arrays, is widely used for locating acoustic sources. However, the location results of this method are unstable, and the computational efficiency is low. In this work, in order to improve the robustness and reduce the computational cost, a DCS-SOMP-SVD com-pressed sensing method, which combines the distributed compressed sensing using simultaneously orthogonal matching pursuit (DCS-SOMP) and singular value decomposition (SVD) is proposed. The performance of the DCS- SOMP-SVD is studied through both simulation and experiment. In the simulation, the locating results of the DCS- SOMP-SVD method are compared with the wideband BP method and the DCS-SOMP method. In terms of computa-tional efficiency, the proposed method is as efficient as the DCS-SOMP method and more efficient than the wideband BP method. In terms of locating accuracy, the proposed method can still locate all sources when the signal to noise ratio (SNR) is - 20 dB, while the wideband BP method and the DCS-SOMP method can only locate all sources when the SNR is higher than 0 dB. The performance of the proposed method can be improved by expanding the frequency range. Moreover, there is no extra source in the maps of the proposed method, even though the target sparsity is overestimated. Finally, a gas leak experiment is conducted to verify the feasibility of the DCS-SOMP-SVD method in the practical engineering environment. The experimental results show that the proposed method can locate both two leak sources in different frequency ranges. This research proposes a DCS-SOMP-SVD method which has sufficient robustness and low computational cost for wideband acoustic imaging.
其他文献
  目的:探讨整体护理在高速公路院前急救中应用效果。方法:以750例高速公路车祸伤病人为中心,以现代护理观为指导,以护理程序为墓础框架,根据现场环境及病人的生理、心理、社会
  目的:探讨多功能外固定架对开放性胫腓骨骨折的治疗效果。方法:回顾我院急救部2009年1月至2010年6月间146例开放性胫腓骨骨折,使用多功能外固定架治疗的临床疗效,并进行跟踪
  本文以64例多发性创伤患者为研究对象,将循证护理应用于其院前急救护理中,介绍了询证护理的流程,探讨了其应用效果。指出:循证实践中,护理人员依据确切、可信、实用的临床证据
笔者从育苗前的准备、育苗的范围、育苗的时期、方法及育苗后的栽培管理等方面 ,阐述了枣树开沟育苗和归圃育苗技术 The author describes the jujube tree cultivation and
期刊