Title :
Tests of coherence unbiasing methods
Author :
Stearns, Samuel D.
Author_Institution :
Sandia National Laboratories, Albuquerque, NM, USA
fDate :
4/1/1981 12:00:00 AM
Abstract :
The causes of bias in the mean-squared coherence (MSC) estimate are discussed, assuming that the estimate is made using the FFT method. Two known unbiasing methods, prewhitening and MSC averaging, are tested in situations where the true MSC is known, and are seen to reduce bias. MSC averaging is recommended as the best unbiasing method.
Keywords :
Acoustic signal processing; Frequency conversion; Frequency estimation; Motion estimation; Performance evaluation; Speech processing; Testing;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
DOI :
10.1109/TASSP.1981.1163540
