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Multirate Processing Technique for Obtaining Integer and Fractional-Order Derivatives of Low-Frequency Signals.
- Source :
- IEEE Transactions on Instrumentation & Measurement; Apr2014, Vol. 63 Issue 4, p904-912, 9p
- Publication Year :
- 2014
-
Abstract
- This paper proposes a multirate processing technique for obtaining integer and fractional derivatives of digital signals with an improved signal-to-quantization noise ratio. The technique consists of an oversampling analog-to-digital conversion unit with a dithering process and multistage down sampling process followed by an half-band finite impulse response (FIR) differentiator with high performance cascaded using a decimator with a factor of two. In the cascaded multistage processing, each stage contains a simple half-band low-pass FIR filter followed with decimation by two. The proposed technique uses an extremely small size for each half-band low-pass filter, hence requiring much less memory and computational complexity in comparison with the single-stage process. Computer simulations and experimental data processing demonstrate the effectiveness of the proposed method. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00189456
- Volume :
- 63
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Instrumentation & Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 94892119
- Full Text :
- https://doi.org/10.1109/TIM.2013.2289578