Sub-Nyquist acquisition hardware for wideband communication
| Autor: | Moshe Mishali, Yonina C. Eldar, Eli Shoshan, Oleg Dounaevsky |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
business.industry
Computer science Signal reconstruction Circuit design Local oscillator Bandwidth (signal processing) Electrical engineering Sampling (statistics) Sampling (signal processing) Hardware_INTEGRATEDCIRCUITS Waveform Nyquist–Shannon sampling theorem ComputerSystemsOrganization_SPECIAL-PURPOSEANDAPPLICATION-BASEDSYSTEMS Detection theory Nyquist rate Network synthesis filters Wideband business Computer hardware |
| Zdroj: | 2010 IEEE Workshop On Signal Processing Systems. |
| DOI: | 10.1109/sips.2010.5624782 |
| Popis: | We present a sub-Nyquist analog-to-digital converter of wideband inputs. Our circuit realizes the recently proposed modulated wideband converter, which is a flexible platform for sampling signals according to their actual bandwidth occupation. The theoretical work enables, for example, a sub-Nyquist wideband communication receiver, which has no prior information on the transmitter carrier positions. Our design supports input signals with 2 GHz Nyquist rate and 120 MHz spectrum occupancy, with arbitrary transmission frequencies. The sampling rate is as low as 280 MHz. To the best of our knowledge, this is the first reported wideband hardware for sub-Nyquist conversion. We describe the various circuit design considerations, with an emphasis on the nonordinary challenges the converter introduces: mixing a signal with a multiple set of sinusoids, rather than a single local oscillator, and generation of highly-transient periodic waveforms, with transient intervals on the order of the Nyquist rate. Hardware experiments validate the design and demonstrate sub-Nyquist sampling and signal reconstruction. |
| Databáze: | OpenAIRE |
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