Estimation of the magnitude-squared coherence function via overlapped fast Fourier transform processing
- 1 August 1973
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Audio and Electroacoustics
- Vol. 21 (4) , 337-344
- https://doi.org/10.1109/tau.1973.1162496
Abstract
A method for estimating the magnitude-squared coherence function for two zero-mean wide-sense-stationary random processes is presented. The estimation technique utilizes the weighted overlapped segmentation fast Fourier transform approach. Analytical and empirical results for statistics of the estimator are presented. The analytical expressions are limited to the nonoverlapped case; empirical results show a decrease in bias and variance of the estimator with increasing overlap and suggest a 50-percent overlap as being highly desirable when cosine (Hanning) weighting is used.Keywords
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