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The effect of sampling and quantization on frequency estimation
- Host-Madsen, A. (författare)
- Händel, Peter, 1962- (författare)
- 1998
- 1998
- Engelska.
- Ingår i: 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP. ; , s. 2217-2220
- Konferensbidrag (refereegranskat)
Abstract
Ämnesord
Stäng
- The effect of sampling and quantization on frequency estimation for a single sinusoid is investigated. The Cramer-Rao bound for 1 bit quantization is derived, and compared with the limit of infinite quantization. It is found that 1 bit quantization gives a slightly worse performance, however, with a dramatic increase of variance at certain frequencies. This can be avoided by using 4 times oversampling. The effect of sampling when using non-ideal antialiasing lowpass filters is therefore investigated. Cramer-Rao lower bounds are derived, and the optimal filters and sampling frequencies are found. Finally, fast estimators for 1 bit sampling, in particular correlation based estimators, are derived. The paper concludes with simulation results for 4 times oversampled 1 bit quantization
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- 1 bit quantization;4 times oversampling;AWGN;Cramer-Rao bound;additive white Gaussian noise;correlation based estimators;frequency estimation;infinite quantization;nonideal antialiasing lowpass filters;optimal filters;quantization effect;sampling effect;sampling frequencies;simulation results;single sinusoid;Gaussian noise;correlation methods;filtering theory;frequency estimation;low-pass filters;quantisation (signal);signal sampling;white noise
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- kon (ämneskategori)
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