A band-limited signal extrapolation algorithm using pseudo inverse filtering and heuristic optimization
Kenji Nakayama · 2003
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.>