Spectral moment estimators: A new approach to tone detectionBell Systems Labs Technical Journal
AbstractClassical tone detectors use narrow bandpass filters to isolate tones. A comparison of a filter's output power against the total input signal power determines whether or not a particular tone is present. This paper considers an alternate method for tone detection. It is based on estimating the first three moments of the signal's band-limited power spectrum. These three moments (zeroth, first, and second) measure the power, power mean frequency, and RMS power bandwidth, respectively, of the signal. If these three moments are available, it is easy to deduce whether or not a tone is present. Since the estimators have a simple digital implementation, this approach should have economic advantages in many applications.
Published CitationDenenberg, J. N. "Spectral moment estimators: A new approach to tone detection." Bell System[Labs] Technical Journal 55, no. 2 (1976): 143-155.
Citation InformationJeffrey N. Denenberg. "Spectral moment estimators: A new approach to tone detection" Bell Systems Labs Technical Journal Vol. 55 Iss. 2 (1976)
Available at: http://works.bepress.com/jeffrey_denenberg/6/