Amplitude estimation of a sinusoid buried in heavy noise using stochastic resonance

This paper investigates four methods to estimate the amplitude of a sinusoid buried in noise, using the phenomenon of stochastic resonance (SR) to obtain the best estimate. SR is a cooperative effect in which the power in the broadband part of the spectrum is fed in to the output power of the signal frequency. We use a 3-level quantizer in our experiments to quantize the sinusoid buried in noise after variance-controlled AWGN is added to it We estimate the amplitude at the optimum variance, which is obtained from the experimentally obtained SNR data.