FINAL REPORT INCLUDING SOME EXPERIMENTAL STUDIES OF SIGNAL DETECTION IN NONSTATIONARY BACKGROUND NOISE

摘要

The results of an experimental investigation of the effects of non-stationary noise on detector performance ore given. The specific detection problem investigated was that of determining the presence or absence of a noise-like signal given the output of two receivers each of which contained a nonetationary noise and the signal if it was present. The noises were both members of a nonstationary ensemble and were obtained by modulating Gaussian, stationary noises having band-pass spectra with a low-frequency random waveform obtained by strongly clipping a Gaussian, stationary, low-frequency noise with a band-pass spectrum. The signal and the unmodulated noises had spectra of the same form and were statistically independent. A multiplier followed by an RC average was used as a detector and the threshold signal power was estimated from a series of detection trials.