Publications [#66694] of Jeffrey L. Krolik

Papers Published

1. Varadarajan, V. and Krolik, J., Sensor array shape estimation using active sonar clutter, 2002 IEEE Sensor Array and Multichannel Signal Processing Workshop Proceedings (Cat. No.02EX593) (2002), pp. 533 - 7, Rosslyn, VA, USA [SAM.2002.1191097]
   (last updated on 2007/04/16)

   Abstract:
   This paper concerns the problem of array shape estimation from clutter (ASEC) for a towed active sonar array. Although heading sensors can provide towed-array shape information, they are sometimes not sufficiently available or accurate to facilitate beamforming with low sidelobe levels necessary for detection of low-Doppler targets, especially in the presence of severe bottom reverberation. We propose a maximum likelihood array shape calibration technique that exploits the azimuth-Doppler frequency relationship of the clutter by fitting the reverberation snapshots from a single sonar ping to the low rank space-time clutter subspace

   Keywords:
   array signal processing;calibration;clutter;Doppler effect;maximum likelihood estimation;reverberation;sonar arrays;sonar detection;