In this contribution, we propose a DOA (Direction Of Arrival) estimation method of speech signal whose angular resolution is almost uniform with respect to DOA. Our previous DOA estimation method[1] achieves high precision with only two microphones, however its resolution degrades as the propagating direction apart from the array broadside. In the proposed method, the equilateral-triangular mic...

We present an algorithm for direction-of-arrival tracking that allows operation below the ambiguity threshold of the direction nding system. Using multiple target tracking techniques, the algorithm turns the most likely directions-of-arrival of each measurement into multiple potential tracks and then selects the true track as that with the maximum cumulative likelihood. The improvement o ered b...

A subspace-based method for joint range and DOA (direction-of-arrival) estimation of multiple near-field sources is presented. The proposed method uses fourth-order cumulants, and the range and DOA parameters are directly given by the eigenvectors and eigenvalues of a constructed matrix. Compared with some available methods, the 2D parameters are automatically paired and the loss of array apert...

High-resolution direction-of-arrival (DOA) estimation requires an accurate array response model, which is usually achieved by measuring the response for given directions of the sources and employing interpolation. This paper considers the array response interpolation and DOA estimation by coherently combing parametric modeling and interpolation techniques. The proposed method is to decompose th...

The focus of this contribution is put on the blind localization of mobile terminals in urban scenarios. The proposed localization method exploits multipath propagation, which is typical of urban terrain. It is assumed that each multipath component is characterized by its direction of arrival (DoA) and relative time of arrival (RToA) parameter. In essence the developed method compares the multip...

In this paper, a high-resolution direction-of-arrival (DOA) estimation algorithm is proposed for highly correlated signals. This algorithm is divided into two stages. In Stage 1, a high-resolution method of DOA estimation using an oblique projection operator was applied to estimate the DOA of highly correlated signals. In Stage 2, because estimations obtained in highly correlated signal environ...

In many applications such as radar and mobile communication, the multipath propagation e5ects are described as a sum of contributions of a large number of wavefronts that arrives at the sensor array in clusters of rays, distributed around a nominal direction of the signal sources. Based on this observation and on the work of Bengtsson and Ottersten (Proceeding of Norsig-98, IEEE Nordic Signal P...

In this paper, we propose an efficient two-dimensional geo-location system for social safety robot, where its location is obtained by direction of arrival (DOA) and time of arrival (TOA) of the radio signal. The proposed system requires two reference signals while the conventional systems generally deploy more than three reference signals. For estimating TOA and DOA information together, we emp...

6.1 Spectral Estimation Methods 6.1.1 Bartlett Method 6.2 Minimum Variance Distortionless Response Estimator 6.3 Linear Prediction Method 6.4 Maximum Entropy Method 6.5 Maximum Likelihood Method 6.6 Eigenstructure Methods 6.7 MUSIC Algorithm 6.7.1 Spectral MUSIC 6.7.2 Root-MUSIC 6.7.3 Constrained MUSIC 6.7.4 Beam Space MUSIC 6.8 Minimum Norm Method 6.9 CLOSEST Method 6.10 ESPRIT Method 6.11 Wei...