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Direction of arrival (DOA) estimation of quasi-stationary signals (QSS) impinging on a nested array in the context of sparse representation is addressed in this paper. By exploiting the quasi-stationarity and extended virtual array structure provided inherently in the nested array, a new narrowband signal model can be obtained, achieving more degrees of freedom (DOFs) than the existing solutions....
This paper introduces a Direction of Arrival (DOA) estimation technique for microphone arrays that has improved robustness in reverberant environments. The technique applies a separate beamformer at each frequency to estimate the DOA of the speech signal at that frequency. A histogram of the DOA estimates from all frequencies is then formed, which represents the probability of the signal coming from...
This paper presents a three dimensional sensor and source position calibration algorithm for automatically determining the positions of individual microphones in a three dimensional space with at least one linear sub array of sensors. Time-difference of arrival measurements were obtained from a mobile sounding source. The algorithm uses a nonlinear least squares method to first calibrate the linear...
The paper presents a simple recursive solution to passive tracking of maneuvering targets using time difference of arrival (TDOA) measurements. Firstly, an iterative Gauss–Newton algorithm is developed for stationary target localization based on a constrained weighted least-squares (CWLS) criterion. The advantages of the CWLS estimate are its inherent stability due to the absence of local minima at...
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