On sources covariance matrix singularities and high-resolution active wideband source localization

نویسندگان

  • Daniel Gonçalves
  • Patrick Gounon
چکیده

High resolution eigenstructure-based techniques for signal source localization are known to be ineffective when the source covariance matrix is not of full rank. We present here two techniques to circumvent this problem in the context of wideband active source localization. An extension is made to show how eigenstructure methods can be applied even when there is only one snapshot available to estimate the wideband spectral matrices.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Two Robust Super Resolution Approaches in Aeroacoustic Imaging for Near-field Wideband Extended Sources

Recently deconvolution-based methods, like the DAMAS, have greatly improved spatial resolutions of the Beamforming in aeroacoustic imaging. But most of existing methods are not robust to background noise. In this paper, we propose two robust superresolution approaches using Sparsity Constraint (SC-RDAMAS) and Sparse Regularisation (SR-RDAMAS) respectively to simultaneously estimate source power...

متن کامل

Identification of Wideband Sources Using Higher Order Statistics in noisy environment

This paper deals with the localization of the wideband sources. We develop a new approach for estimating the wide band sources parameters. This method is based on the high order statistics of the recorded data in order to eliminate the Gaussian components from the signals received on the various hydrophones. In fact the noise of sea bottom is regarded as being Gaussian. Thanks to the coherent s...

متن کامل

A New Method for Estimation of the Source Coherency Structure of Wideband Sources

Based on the sources’ smoothed rank profile (SRP) and modified minimum description length (MMDL) principle, a method for estimation of the source coherency structure (SCS) and the number of wideband sources is proposed in this paper. Instead of focusing, we first use a spatial smoothing technique to pre-process the array covariance matrix of each frequency for de-correlating the sources and the...

متن کامل

Localization of 3d Near-field Source Using the Aperture Extension Method and Nonuni- Form Cross Array

Depending on the aperture extension (AE), a high performance three-dimensional (3D) near-field (NF) source localization algorithm is proposed with the nonuniform linear array (NLA). The proposed algorithm first generates some fictitious sensors to extend the array aperture by constructing a new Toeplitz matrix, and then obtains a two-dimensional (2D) covariance matrix which only contains the el...

متن کامل

Bayesian sparse regularization in near-field wideband aeroacoustic imaging for wind tunnel test

1397 Robust deconvolution-based methods using sparsity constraint and sparse regularization achieve high spatial resolutions in aeroacoustic imaging in low Signal-to-Noise Ratio (SNR). But sparse prior and model parameters should be further optimized to obtain super resolution and be robust to sparsity constraint. In this paper, we propose a Robust Approach with Bayesian Sparse Regularization i...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998