No abstract

This paper presents near-field localization of unintended emitting radio-controlled (RC) sources in a colored noise environment using a uniform linear array antenna. Existing localization methods for RC devices perform satisfactorily under white noise, but they ignore multipath fading or correlation among the sources. Therefore, a suite of novel schemes, referred to as 2-D multiple signal classification (MUSIC)-smooth sparse arrays and 2-D MUSIC-whitened noise, is proposed to bring correlation together among the sources, multipath fading, and color noise effects during near-field location estimation. Experimental evaluation of the proposed methods and the original smooth 2-D MUSIC compares both schemes while demonstrating their effectiveness.Index Terms-Array signal processing, colored noise, direction of arrival (DOA), multiple signal classification (MUSIC), near-field localization, range estimation, spatial smoothing.

No abstract

This paper presents an analysis of localization and tracking of unintended emissions from electronic devices using computer simulations. The available localization and tracking methods assume that the device is in the far-field region of the array. However, the received power of unintended emissions is very low and, therefore, requires near-field techniques. In the near-field, the performance of far-field schemes degrades since they ignore the effect of range on phase characteristics. Computer simulation results for localization and tracking methods developed by the authors are summarized to analyze the effects of near and far-field regions.

No abstract