Conference Proceedings

Adaptive Matched Filter using Non-Target Free Training Data

AM Rekavandi, AK Seghouane, RJ Evans

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) | IEEE | Published : 2020

Abstract

The problem of detecting a subspace signal in colored Gaussian noise with unknown covariance matrix is investigated when the training data may contain samples with target signal. The target signal is assumed that it lies in a subspace spanned by columns of a known matrix. To develop the test, an ad hoc approach, similar to the classical adaptive matched filter (AMF) is used where instead of the maximum likelihood (ML) estimator of the covariance, the minimum α-divergence based estimator is substituted in the likelihood ratio. This test just depends on the single parameter α and as a special case can be turned to the AMF. For a range of α, the proposed test has the benefits of being robust to..

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