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Noise shaping Riemann: an energy efficient data conversion scheme.

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Title: Noise shaping Riemann: an energy efficient data conversion scheme.
Authors: Veyrac, Yoan1 yoan.veyrac@ims-bordeaux.fr, Rivet, Francois1, Deval, Yann1
Source: Analog Integrated Circuits & Signal Processing. Aug2017, Vol. 92 Issue 2, p189-197. 9p.
Subjects: Energy consumption, Analog data, Caloric expenditure, Radio frequency, Sampling theorem
Abstract: This paper presents a novel conversion scheme for time signals, especially suited for wireless communication applications. The digital/analog data representation paradigm is discussed and critical aspects are determined. It involves digital information coding, two-way digital/analog conversion and their respective efficiency. The proposed conversion scheme relies on a slight oversampling ratio (OSR), combined with a differentiating coding and a $$1^\mathrm{st}$$ order noise shaping loop. It achieves a resolution increased by 2.5 effective number of bits per doubling of the OSR. The resulting conversion efficiency combined with a moderate digital coding complexity leads to a substantial improvement of the energy cost of conversion compared to conventional Nyquist rate architectures. The efficiency gain is even higher for converters limited by thermal noise. It can reach a ten fold improvement for OSR around 10, which makes this architecture a good option for the handling of radio frequency signals. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:This paper presents a novel conversion scheme for time signals, especially suited for wireless communication applications. The digital/analog data representation paradigm is discussed and critical aspects are determined. It involves digital information coding, two-way digital/analog conversion and their respective efficiency. The proposed conversion scheme relies on a slight oversampling ratio (OSR), combined with a differentiating coding and a $$1^\mathrm{st}$$ order noise shaping loop. It achieves a resolution increased by 2.5 effective number of bits per doubling of the OSR. The resulting conversion efficiency combined with a moderate digital coding complexity leads to a substantial improvement of the energy cost of conversion compared to conventional Nyquist rate architectures. The efficiency gain is even higher for converters limited by thermal noise. It can reach a ten fold improvement for OSR around 10, which makes this architecture a good option for the handling of radio frequency signals. [ABSTRACT FROM AUTHOR]
ISSN:09251030
DOI:10.1007/s10470-017-0980-9