Coherently Distributed Wideband LFM Source Localization

Abstract

In this letter, novel models of coherently distributed wideband sources in both time domain and fractional Fourier domain are proposed. For wideband linear frequency-modulated (LFM) source, the one-to-one relationship between the location vector in the Dechirping domain and the spatial parameters is given. Then, the Multiple Signal Classification (MUSIC) type algorithm for distributed narrowband source localization is exploited to estimate the central angle and the extension width of multiple distributed LFM sources in the Dechirping domain. The simulations demonstrate the proposed algorithm can determine the number of incident sources which in this algorithm is allowed to exceed the number of sensors in the array and obtain high performance in location position accuracy and anti-noise property.