Title :
Effect of noise on real-time parameter estimation of multifrequency signals
Author :
Offelli, C. ; Petri, D.
Author_Institution :
Dipartimento di Elettronica e Inf., Padova Univ., Italy
Abstract :
An investigation was conducted of the noise influence on the accuracy of a frequency-domain procedure suitable for the real-time estimation of multifrequency signal parameters. Imposing very weak assumptions about the statistical description of the noise, simple and accurate expressions for the variances of the estimators are established. They allow both the evaluation of the resulting accuracy and the design of the estimation method. The effect of the window sequence applied to the incoming signal in order to reduce the occurrence of spectral leakage is analyzed in detail. Simulation results confirm the validity of the analysis
Keywords :
frequency-domain analysis; parameter estimation; random noise; spectral analysis; statistical analysis; frequency-domain procedure; multifrequency signals; noise influence; real-time parameter estimation; simulation; spectral leakage; statistical description; variances; window sequence; Discrete Fourier transforms; Frequency domain analysis; Frequency estimation; Interpolation; Measurement uncertainty; Parameter estimation; Signal analysis; Signal processing; Signal to noise ratio; Stochastic processes;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1991. IMTC-91. Conference Record., 8th IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-87942-579-2
DOI :
10.1109/IMTC.1991.161579
