SOURCE LOCALIZATION WITH SPARSE RECOVERY FOR COHERENT FAR- AND NEAR-FIELD SIGNALS


Elbir A. M. , TUNCER T. E.

2015 IEEE Signal Processing and Signal Processing Education Workshop (SP/SPE), Utah, United States Of America, 9 - 12 August 2015, pp.124-129 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Utah
  • Country: United States Of America
  • Page Numbers: pp.124-129
  • Keywords: DOA estimation, Compressed Sensing, Coherent signals, Far-field, Near-field

Abstract

In source localization applications, coherency among the signals is an important source of error for parameter estimation. In this paper, a method is proposed to solve the localization problem where there are coherently mixed arbitrary number of far- and near-field sources. In order to estimate the direction-of-arrival (DOA) and the range parameters, compressed sensing (CS) approach is presented where a dictionary matrix is constructed with far- and near-field steering vectors. A sparse vector including the supports of the source signals is estimated in spatial domain. The supports of coherent signals are recovered by using convex minimization techniques. It is shown that the proposed approach recovers the signal components of the array output as well as determining the source locations.