DocumentCode :
2329092
Title :
On non uniform sampling of signals
Author :
Brueller, Nir N. ; Peterfreund, Natan ; Porat, Moshe
Author_Institution :
Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel
Volume :
1
fYear :
1998
fDate :
7-10 Jul 1998
Firstpage :
249
Abstract :
In a variety of applications, it is desirable to represent a signal by a set of nonuniformly distributed samples. In particular, this is of interest in the case of nonbandlimited signals where an alternative method to uniform sampling is required. In this work, a new approach to nonuniform sampling is introduced and discussed. The proposed method is based on estimation of a time distortion transformation, under which the original signal becomes practically bandlimited and can thus be reconstructed. The time distortion transformation is estimated using an iterative algorithm. According to this approach, the distortion function is accumulated where each iteration is aimed at compensating for differences in the instantaneous bandwidth after the previous iteration. This process converges and reaches a stage where the signal has practically a constant instantaneous bandwidth over the distorted time axis. Due to the iterative nature of the estimation process, most available techniques of localized bandwidth approximation may be used. The resultant mapping can be considered also as a new means for the definition of local bandwidth
Keywords :
estimation theory; iterative methods; signal representation; signal sampling; transforms; distortion function; iterative algorithm; localized bandwidth approximation; mapping; nonbandlimited signals; nonuniform sampling; nonuniformly distributed samples; process convergence; signal representation; time distortion transformation estimation; Bandwidth; Digital signal processing; Distortion; Iterative algorithms; Sampling methods; Signal processing; Signal processing algorithms; Signal reconstruction; Signal representations; Signal sampling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics, 1998. Proceedings. ISIE '98. IEEE International Symposium on
Conference_Location :
Pretoria
Print_ISBN :
0-7803-4756-0
Type :
conf
DOI :
10.1109/ISIE.1998.707786
Filename :
707786
Link To Document :
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