Title :
A new method for measuring the performance of weakly nonlinear systems
Author :
Schussler, H.W. ; Dong, Y.
Author_Institution :
Lehrstuhl fur Nachrichtentech., Erlangen, Nurnberg Univ., West Germany
Abstract :
Real transmission systems are only approximately linear. Their actual performance can be described by a model consisting of an ideal linear subsystem and a nonlinear one. A method is presented for measuring the complex transfer function of the linear part and simultaneously the power density spectrum of the noise produced by the nonlinear subsystem. The procedure has been implemented using an integrated signal processor under PC control. Its performance is demonstrated with results found for digital filters, working with limited wordlength, quantizers, and limiters. They are in excellent agreement with those based on theoretical considerations. The method works very fast and yields extremely accurate results even in the stopband of filters
Keywords :
filtering and prediction theory; nonlinear systems; PC control; complex transfer function; digital filters; integrated signal processor; limiters; power density spectrum; quantizers; stopband; weakly nonlinear systems; wordlength; Acoustic noise; Density measurement; Digital filters; Noise measurement; Nonlinear systems; Performance evaluation; Power measurement; Power system modeling; Time measurement; Transfer functions;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266873
