提高麦克风阵列波束指向性能的虚拟扩展方法

doi:10.3969/j.issn.1001-2400.2016.02.020

西安电子科技大学学报 ›› 2016, Vol. 43 ›› Issue (2): 114-119.doi: 10.3969/j.issn.1001-2400.2016.02.020

提高麦克风阵列波束指向性能的虚拟扩展方法

杨洁1;刘聪锋2;蔡啸3

(1. 西安邮电大学通信与信息工程学院，陕西西安 710121;
2. 西安电子科技大学电子对抗研究所，陕西西安 710071;
3. 解放军63893部队训练中心，河南洛阳 471003)

收稿日期:2014-10-31 出版日期:2016-04-20 发布日期:2016-05-27
通讯作者: 杨洁
作者简介:杨洁(1976-), 女, 副教授, E-mail: yangjie@xupt.edu.cn．
基金资助:
国家自然科学基金资助项目(61402365, 61271300)；陕西省教育厅自然科学类专项科研计划资助项目(2013JK1076)；陕西省科技资助项目(2013K-33, 2014KW01-04)；国家留学基金资助项目(201406965022)；中央高校基本科研业务费专项资金资助项目(JDYB141913, K0551302006)

Improved steering based on the virtual extend method for the microphone array

YANG Jie1;LIU Congfeng2;CAI Xiao3

(1. School of Communication and Information, Xi'an Univ. of Post ＆ Telecommunication, Xi'an 710121, China;
2. Research Inst. of Electronic Countermeasures, Xidian Univ., Xi'an 710071, China;
3. Training Center, PLA 63893, Luoyang 471003, China)

Received:2014-10-31 Online:2016-04-20 Published:2016-05-27
Contact: YANG Jie

摘要/Abstract

摘要：

针对宽带麦克风阵列如何在全频段保持一致性最优阵列处理问题，提出了麦克风阵列虚拟扩展稳健处理方法．该方法不仅在信号模型以及理论推导上深入分析了阵列虚拟扩展所带来的阵列误差、实现难点，而且提出了基于对角加载的稳健处理方法，并给出了加载电平的选取方法．最后对所提阵列虚拟扩展方法的处理性能进行了详细的理论分析和仿真实验，得出了阵列虚拟扩展可以有效地提高自适应波束形成器性能的结论．所提方法不仅适用于均匀线阵，而且也可直接推广应用于其他任意构型的自适应阵列；不仅适用于单信源场景，同时也适用于多信号源场景．

关键词: 麦克风阵列, 阵列虚拟扩展, 对角加载, 自适应波束形成

Abstract:

For the broadband microphone array, how to maintain the consistency of optimal array processing in the whole frequency band is the key problem, so an efficient virtual array extending method is put forward. This method is not only suitable for the single source scenarios, but also suitable for the multi signal source scene. Therein, from the signal model and the theoretical derivation, the problem which is caused by array virtual extending is analyzed deeply, such as array error and difficulty of its realization, then a robust method based on diagonal loading is proposed, and the method of how to select the load level is also given. Finally, the processing performance of the proposed virtual array extension method is tested and verified by theoretical analysis and detailed simulation results, and the conclusion is obtained that virtual array extension can improve the adaptive beamformer performance effectively. The proposed method is not only used for the uniform linear array, but also can be applied to the adaptive array with an arbitrary configuration.

Key words: microphone array, array virtual extend, diagonal loading, adaptive beamforming

杨洁;刘聪锋;蔡啸. 提高麦克风阵列波束指向性能的虚拟扩展方法[J]. 西安电子科技大学学报, 2016, 43(2): 114-119.

YANG Jie;LIU Congfeng;CAI Xiao. Improved steering based on the virtual extend method for the microphone array[J]. Journal of Xidian University, 2016, 43(2): 114-119.

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提高麦克风阵列波束指向性能的虚拟扩展方法

Improved steering based on the virtual extend method for the microphone array

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