In this paper, we describe a new blind source separation (BSS) method that uses spatial information derived from the direction of arrival (DOA) estimates of each direct and reflected sound. The method we proposed has the following steps: (1) each DOA is estimated using matching pursuit and re-optimized after each new DOA is estimated, (2) using these DOA estimates, the mixing matrix is also est...

In this paper, we propose an efficient twodimensional geo-location system for social safety robots, where its location is obtained by direction of arrival (DOA) and time of arrival (TOA) of the radio signal of IEEE 802.11a. The proposed system requires only two reference signals while the conventional systems generally deploy more than three reference signals. For estimating TOA and DOA informa...

The theory, design, fabrication, and measurement of new uniform circular arrays (UCAs) for direction of arrival (DOA) estimation is presented in this report. In particular, the effect of directional antenna elements in UCAs for DOA estimation is studied in detail. While the vast majority of previous work assumes isotropic antenna elements or omnidirectional dipoles, this work demonstrates that ...

We investigate the generalized receiver (GR) constructed based on the generalized approach to signal processing in noise employing non-blind beamforming algorithms and direction of arrival (DOA) estimation, which is implemented by multiple-input multiple-output (MIMO) wireless communication systems. We compare three non-blind beamforming algorithms, namely, the least mean square (LMS), the recu...

In automotive radar systems, only a small number of snapshots are available for direction-of-arrival (DOA) estimation in high mobility scenarios. We here propose a closed-form singlesnapshot maximum likelihood (ML) DOA estimator based on the phase-comparison technique. The estimator can be effective in a wide field-of-view (FOV) scenario and is robust to gain-mismatch effects among antenna elem...

| A simple general formula is derived under a Gaussian model for the asymptotic covariance of direction-of-arrival (DOA) estimators based on the covariance of the sensor array data. It is then established that the same formula remains valid for a wide class of statistical models for source signals. Hence, under mild assumptions, the asymp-totic performance of most high-resolution covariance-bas...

This paper introduces the application of high-resolution angle estimation algorithms for a 77GHz automotive long range radar sensor. Highresolution direction of arrival (DOA) estimation is important for future safety systems. Using FMCW principle, major challenges discussed in this paper are small number of snapshots, correlation of the signals, and antenna mismatches. Simulation results allow ...

The authors consider the impact of a small but nonzero bandwidth on narrowband direction-of-arrival (DOA) estimation using an array of sensors. They derive expressions for the DOA error for three commonly used array processing algorithms: MUSIC, ESPRIT and weighted subspace fitting (WSF). The error expressions are found by a perturbation analysis of these algorithms for small relative bandwidth...