我们的网站为什么显示成这样？

可能因为您的浏览器不支持样式，您可以更新您的浏览器到最新版本，以获取对此功能的支持，访问下面的网站，获取关于浏览器的信息：

|本期目录/Table of Contents|

声被动测向的多小孔径基阵联合宽带降序估计方法(PDF)

《探测与控制学报》[ISSN:1008-1194/CN:61-1316/TJ]

期数:
2008年04期
页码:
12
栏目:
出版日期:
2008-08-26

文章信息/Info

Title:
Multiple Wide-band Source Location Using Multiple Subarray with Small Aperture in the Air
文章编号:
1008-1194(2008)04-0012-05
作者:
郗润平 1; 冯杰 2
1.西北工业大学计算机学院，陕西 西安710072；2.中国电子科技集团公司第三研究所，北京100015
Author(s):
XI Run-ping 1; FENG Jie 2
1.Computer School,Northwest Polytechnology University,Xi’an 710072,China;2.The Third Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China
关键词:
小孔径基阵; 声定位; 降秩估计器(RARE); 宽带声源
Keywords:
small aperture array; RARE; DOA estimation; wide-band source
分类号:
TN911.7
DOI:
.
文献标识码:
A
摘要:
提出了一种基于多个小孔径子阵的宽带声定位方法，并应用于低空多目标的无源定向中。该方法将目标源辐射的低频宽带噪声通过相干处理，然后构造近似的降秩估计器对目标进行方位估计，有效地解决了通常单个小孔径基阵难以满足的多目标分辨和定向精度要求。由于所构造的估计器不需要各子阵之间的位置信息，从而避免了伪峰和位置估计误差对方位估计的影响。仿真和实验结果表明，该方法提高了定向精度，给出了稳定的信号方位估计，能较好地实现大气声定位中对近距离多目标的分辨。
Abstract:
This paper presents an approach for the estimation of directions-of-arrival of multiple wide-band sources using multiple small aperture subarrays.A novel signal model used in rank reduction estimator (RARE) is used to deal with information that output from multiple small aperture subarrays.Then the RARE in approximate sense is used to estimate directions-of-arrival of multiple wide-band sources.Source resolution and directional precision are increased by extending array aperture.Moreover, false peak appeared in conventional methods based on eigen-subspace is removed from spatial spectrum effectively in our method. Sensitivity to position error is reduced by robust RARE.Simulation and experiment show that the method has much greater statistical stability and much low threshold of SNR.Especially,the correct DOA estimation can be also obtained in the case of large intersubarray displacement error.

参考文献/References


［1］唐建生,孙超.空气中任意阵列声被动定向模型的误差分析［J］.西北工业大学学报,2004,22(4):496-499.
［2］王昭.小基阵高精度声测被动定位的研究［D］.西安:西北工业大学,1999.
［3］陈华伟,低空目标声测被动定向技术研究［D］.西安:西北工业大学,2002.
［4］杨亦春,程翔.反直升机雷弹声探测系统设计［J］.弹道学报,1999,11(4):25-30.
［5］黄晓燕,罗建.自适应时延估计算法在被动声定位系统中的应用［J］.探测与控制学报,2007,29(2):73-76.
［6］Ng B C,See C M S.Sensor-array calibration using a maximum-likelihood approach［J］.IEEE.Trans Antennas Propagat,1996,44:827-835.
［7］Flanagan B P,Bell K L.Improved array self calibration with large sensor position errors for closely spaced sources［C］//In Proc.Sensor Array Multichannel Signal Processing Workshop.MA:Cambridge,2000:484-488.
［8］郅熙彪,王伟策,张卫平,等.四元声阵列声速修正模型研究［J］.探测与控制学报,2007,29(3):34-36.
［9］Dolph M A,Weiss A J.On focusing matrices for wide-band array processing［J］.IEEE Trans.Signal Processing,1992,42:1 295-1 302.
［10］Hung H S,Mao C Y.Robust coherent signal-subspace processing for directions-of-arrival estimation of wideband sources［J］.IEEE Proc.Radar,Sonar Navig,1994,141:256-259.
［11］Pesavento M,Gershman A B,Wong K M.Direction of arrival estimation in partly calibrated time-varying sensor arrays［C］//Salt Lake City,UT:In Proc ICASSP,2001:3 005-3 008.
［12］Pesavento M,Gershman A B,Wong K M.On uniqueness of direction of arrival estimates using rank reduction estimator(RARE)［C］//Orlando,FL:In Proc ICASSP,2002: 3 021-3 024.

备注/Memo

备注/Memo:
*收稿日期：2008-02-20    修回日期：2008-05-30
作者简介：郗润平(1971-)，男，陕西蓝田人，博士研究生，研究方向：数字信号处理。
更新日期/Last Update: 2008-09-08