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Generalized Bandpass Sampling Algorithm for Multiband Wireless Receivers Suitable for SDR Applications

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Abstract

The bandpass sampling technique is a promising solution for the architecture of software-defined radio receivers. It is possible to digitize signals directly from the radio frequency stage when properly selecting the sampling frequency. With multistandard or multiband radio receivers, system nonlinearities mainly due to low noise amplifiers and downconversion circuits can generate rich output spectra with variable amplitude component levels. Bandpass sampling of such a spectrum, without causing aliasing, is a challenging task. For a nonlinear system, the minimum sampling frequency has been derived only for single-band and dual-band input signals. In this paper, a generalized bandpass sampling algorithm is developed to determine a minimum valid bandpass sampling frequency for either linear or nonlinear systems by considering a multiband input spectrum. Our objective is reducing the complexity of the sampling frequency calculation. Implementation results demonstrate the efficiency and low complexity of the proposed algorithm.

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Authors and Affiliations

  1. GRESCOM Laboratory, Higher School of Communications of Tunis (Sup’Com), University of Carthage City of Communications Technologies, 2083, Ariana, Tunisia

    Jihen Thabet, Rim Barrak & Adel Ghazel

  2. Department of Electrical and Computer Engineering, University of Calgary, Calgary, T2N 1N4, Canada

    Fadhel M. Ghannouchi

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  1. Jihen Thabet
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  2. Rim Barrak
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  3. Adel Ghazel
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  4. Fadhel M. Ghannouchi
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Correspondence to Jihen Thabet.

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Thabet, J., Barrak, R., Ghazel, A. et al. Generalized Bandpass Sampling Algorithm for Multiband Wireless Receivers Suitable for SDR Applications. Circuits Syst Signal Process 36, 1099–1114 (2017). https://doi.org/10.1007/s00034-016-0341-4

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  • DOI: https://doi.org/10.1007/s00034-016-0341-4

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