Signal detection based on analysis of temporal fine structure

What is it about?

This article analyses the effect of noise on temporal fine structure measurements such as zero crossings and instantaneous frequency. Detectors that rely on zero crossing intervals, intervals and peak amplitudes, and instantaneous frequency measurements are developed, and evaluated for the detection of a sinusoid in Gaussian noise, using the power detector as a baseline.

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Why is it important?

The article shows that detectors that rely on fine structure outperform the power detector under certain circumstances. The article also proposes the concept of a doubly reassigned spectrogram, in which temporal measurements are reassigned according to a statistical model of the noise background.