Papers Published

1. Varadarajan, V. and Krolik, J., Model-based space-time adaptive processing for active sonar, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers (IEEE Cat. No.04CH37592), vol. Vol.2 (2004), pp. 1431 - 5 .
   (last updated on 2007/04/16)

   Abstract:
   In this paper, the problem of partially adaptive space-time adaptive processing (STAP) for towed active sonar arrays operating in a strong reverberation environment under extremely snapshot deficient conditions is considered. In particular, we propose a robust STAP technique, which incorporates a physical model for the space-time structure of the received reverberation across range, in order to form a model-based covariance matrix, used to regularize the sample covariance matrix while computing the adaptive weights. Simulation as well as real data results using a bistatic towed active sonar array are presented which demonstrate the improved detection performance obtained using our technique compared to conventional space-time processing and other partially adaptive schemes

   Keywords:
   array signal processing;covariance matrices;radar signal processing;reverberation;sonar arrays;sonar signal processing;space-time adaptive processing;