Abstract
This study presents an efficient algorithm for near-field wideband source localisation. By exploring the characters of spatial-only modelling for near-field wideband array output, the authors firstly construct a virtual array output in which the virtual direction matrix is free of frequency and only related to bearing and range. Then, they exploit the symmetrical property of a uniform linear array to build a special measurement vector merely corresponding to the bearing, and obtain the related estimates via l 1 -norm optimisation solution. By substituting the estimated bearings and vectoring the spatial covariance matrix, they obtain range estimates through a similar sparse signal reconstruction approach without a parameter pairing process. Compared with previous methods, the proposed algorithm avoids performance degradation caused by frequency decomposition and provides improved resolution and preferable robustness to noise. Numerical simulations are conducted to demonstrate the efficiency of the proposed algorithm.
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