Near-field multiple source localization by passive sensor array

作者：Yi-Syun Huang, Mourad Barkat · 发表于：IEEE Transactions on Antennas and Propagation · 年份：1991 · DOI：10.1109/8.86917 · 被引用次数：442 · 研究领域：Speech and Audio Processing、Direction-of-Arrival Estimation Techniques、Indoor and Outdoor Localization Technologies

The localization of multiple near-field sources in a spatially white Gaussian noise environment is studied. A modified two-dimensional (2-D) version of the multiple signal classification (MUSIC) algorithm is used to localize the signal sources; range and bearing. A global-optimum maximum likelihood searching approach to localize these sources is discussed. It is shown that in the single source situation, the covariances of both the 2-D MUSIC estimator and the maximum likelihood estimator (MLE) approach the Cramer-Rao lower bound as the number of snapshots increases to infinity. In the multiple source situation, it is observed that for a high signal-to-noise ratio (SNR) and a large number of snapshots, the root mean square errors (RMSEs) of both localization techniques are relatively small. However, for low SNR and/or small number of snapshots, the performance of the MLE is much superior that of the modified 2-D MUSIC.>