Spectral Analysis - Signal Processing of Random Physiological Signals - page 174

quadrature spectral density function [Quad-spectrum Qxy(f ) ]. The cross-spectrum is cal-
culated in the same manner as the autospectrum, via direct Fourier Transform of the
two signals or via the cross-correlation function. As with the autospectrum, the “Raw”
cross-spectrum must be smoothed , and then normalized to get a good estimation of the
cross-spectrum.

15.7 SUGGESTED READING

1. Bendat, J., and Piersol, A. G. Random Data Analysis and Measurement Procedures.

New York: Wiley & Sons, Inc., 1986.

2. Chatfield, C. The Analysis of Time Series: An Introduction. London: Chapman & Hall,

1980.

3. Lynn, P. A. An Introduction to the Analysis and Processing of Signals. New York: Wiley &

Sons, Inc., 1973.

4. McIntire, D. A. “A Comparative Case Study of Several Spectral Estimators,” In

Applied Time Series Analysis , D. F. Findley, ed., Academic Press, 1978.