Performance analysis of a class of transient detection algorithms-aunified framework |
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Authors: | Porat B Friedlander B |
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Affiliation: | Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa; |
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Abstract: | The detection of short-duration nonstationary signals, which are commonly referred to as transients, is often performed in the time-frequency-transform domain. An analytical framework within which the performance of different detectors based on linear transforms can be easily compared, for different classes of signals, is developed. A given class of transients is modeled as a signal existing in a linear subspace, plus a mismatch signal. Closed-form expressions are derived for the best and the worst detection performance for all possible transients in a given class. Using this framework, the performance of detectors based on the Gabor transform and on the short-time Fourier transform is evaluated and compared |
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