Nihat Kabaoglu

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This paper presents a numerical Bayesian approach for the direction-of-arrival (DOA) tracking of multiple targets using a linear and passive sensor array. In this paper, support vector regression (SVR) method is employed, together with particle filters (PFs), to obtain an effective proposed distribution utilizing observed phenomena to propose a new sample.(More)
In this paper, maximum likelihood estimator is proposed for passive localization of narrowband sources in the spherical coordinates (azimuth, elevation, and range). We adapt Expectation/Maximization iterative method to solve the complicated multi-parameter optimization problem appearing on the 3-D localization problem. The proposed algorithm is based on(More)
In this work, a support vector regression (SVR) based sequential Monte Carlo method is presented to track wideband moving sources using a linear and passive sensor array for a signal model based on buffered data. The SVR method is employed together with a particle filter (PF) method to improve the PF tracker performance when a small sample set is available.(More)
In this paper the performance of the deterministic maximum likelihood 3-D location estimator for the near-field sources is studied based on the derivation of Cramér-Rao bounds. In the derivation, the source signals and unknown parameters are assumed to be deterministic while the noise is Gaussian. Furthermore, some insights into the achievable performance(More)
In this paper, we present a method for time-frequency analysis and classification of electrical machine vibrations based on evolutionary spectrum. Time-frequency analysis provides a means for identifying changes in the vibrations produced by machines. In this work, vibrations generated by different electrical machines are recorded by using accelerometers(More)
In this work, Expectation-Maximization type receiver for uplink of an MC-CDMA system based on a time sharing hopped communication technique is proposed in order to cope with the multipath fading effect in a wireless communication system. In the proposed time-sharing hopped communication method, managing mechanism determines each user channel quality(More)
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