Location Estimation of Wideband Sources with Expectation Maximization Algorithm

In this paper, maximum likelihood (ML) estimator is proposed for the wideband sources in the near-field of the antenna array. The ML solution is obtained in the frequency domain for ML estimation algorithm since the source signal is wideband signal and the corresponding ML solution can not be achieved in the time domain. The expectation maximization (EM) algorithm is therefore suggested for the estimation of the location parameters since there is not closed form solutions for the corresponding maximum likelihood function. Moreover, simulation results of the suggested algorithm are illustrated to present the performance of the algorithm.