Title :
A band-limited signal extrapolation algorithm using pseudo inverse filtering and heuristic optimization
Author_Institution :
NEC Corp., Kawasaki, Japan
Abstract :
A bandlimited signal extrapolation algorithm is proposed. J.A. Cadzow´s algorithm (1979) is modified to eliminate undesired outband spectra. An inverse filter stopband response is relaxed by adding small random numbers. A constrained heuristic optimization is suggested that can use arbitrary signal properties as constraints. Through numerical examples, it is shown how regularization techniques can improve SNR (signal-to-noise-ratio) by 20 dB
Keywords :
extrapolation; filtering and prediction theory; optimisation; signal processing; SNR; bandlimited signal extrapolation algorithm; constraints; heuristic optimization; inverse filter stopband response; pseudo inverse filtering; random numbers; regularization techniques; undesired outband spectra elimination; Constraint optimization; Convolution; Extrapolation; Filtering algorithms; Filters; Frequency; Iterative algorithms; Sampling methods; Signal processing; Signal processing algorithms;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196958
