Distributed target detection in compound-gaussian noise with rao and wald tests
- 25 June 2003
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. 39 (2), 568-582
- https://doi.org/10.1109/taes.2003.1207267
Abstract
The problem of detecting distributed targets in compound-Gaussian noise with unknown statistics is considered. At the design stage, in order to cope with the a priori uncertainty, we model noise returns as Gaussian vectors with the same structure of the covariance matrix, but possibly different power levels. We also assume that a set of secondary data, free of signal components, is available to estimate the covariance matrix of the disturbance. Since no uniformly most powerful test exists for the problem at hand we devise and assess two detection strategies based on the Rao test, and the Wald test respectively. Remarkably these detectors ensure the constant false alarm rate property with respect to both the structure of the covariance matrix as well as the power levels. Moreover, the performance assessment, conducted also in comparison with the generalized likelihood ratio test based receiver, shows that the Wald test outperforms the others and is very effective in scenarios of practical interest for radar systems.Keywords
This publication has 27 references indexed in Scilit:
- Performance of a class of adaptive detection algorithms in nonhomogeneous environmentsIEEE Transactions on Signal Processing, 2000
- Analysis of STAP algorithms for cases with mismatched steering and clutter statisticsIEEE Transactions on Signal Processing, 2000
- Spatially distributed target detection in non-Gaussian clutterIEEE Transactions on Aerospace and Electronic Systems, 1999
- Random walk based characterisation of radar backscatter from the sea surfaceIEE Proceedings - Radar, Sonar and Navigation, 1998
- Clutter-map CFAR detection for range-spread targets in non-Gaussian clutter. I. System designIEEE Transactions on Aerospace and Electronic Systems, 1997
- Computer generation of correlated non-Gaussian radar clutterIEEE Transactions on Aerospace and Electronic Systems, 1995
- Coherent detection of radar targets in a non-gaussian backgroundIEEE Transactions on Aerospace and Electronic Systems, 1994
- Modelling and simulation of non-Rayleigh radar clutterIEE Proceedings F Radar and Signal Processing, 1991
- Maritime surveillance radar. Part 1: Radar scattering from the ocean surfaceIEE Proceedings F Radar and Signal Processing, 1990
- Spatial correlation in K-distributed sea clutterIEE Proceedings F Communications, Radar and Signal Processing, 1987