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Low Cost Sparse Multiband Signal Characterization Using Asynchronous Multi-Rate Sampling: Algorithms and Hardware

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Abstract

Characterizing the spectrum of sparse wideband signals of high-speed devices efficiently and precisely is critical in high-speed test instrumentation design. Recently proposed sub-Nyquist rate sampling systems have the potential to significantly reduce the cost and complexity of sparse spectrum characterization; however, due to imperfections and variations in hardware design, numerous implementation and calibration issues have risen and need to be solved for robust and stable signal acquisition. In this paper, we propose a low-cost and low-complexity hardware architecture and associated asynchronous multi-rate sub-Nyquist rate sampling based algorithms for sparse spectrum characterization. The proposed scheme can be implemented with a single ADC or with multiple ADCs as in multi-channel or band-interleaved sensing architectures. Compared to other sub-Nyquist rate sampling methods, the proposed hardware scheme can achieve wideband sparse spectrum characterization with minimum cost and calibration effort. A hardware prototype built using off-the-shelf components is used to demonstrate the feasibility of the proposed approach.

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Acknowledgments

The authors would like to thank Hittite Microwave for supporting this research by supplying components for the hardware prototype.

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Authors and Affiliations

  1. Georgia Institute of Technology, Atlanta, GA, USA

    Nicholas Tzou, Debesh Bhatta, Barry J. Muldrey Jr., Thomas Moon, Xian Wang, Hyun Choi & Abhijit Chatterjee

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  1. Nicholas Tzou
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  2. Debesh Bhatta
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  3. Barry J. Muldrey Jr.
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  4. Thomas Moon
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  5. Xian Wang
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  6. Hyun Choi
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  7. Abhijit Chatterjee
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Correspondence to Nicholas Tzou.

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Responsible Editor: S. Sunter

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Tzou, N., Bhatta, D., Muldrey, B. et al. Low Cost Sparse Multiband Signal Characterization Using Asynchronous Multi-Rate Sampling: Algorithms and Hardware. J Electron Test 31, 85–98 (2015). https://doi.org/10.1007/s10836-015-5505-9

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  • DOI: https://doi.org/10.1007/s10836-015-5505-9

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