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Reducing the Analog...
Reducing the Analog and Digital Bandwidth Requirements of RF Receivers for Measuring Periodic Sparse Waveforms
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- Nader, Charles, 1982- (författare)
- Högskolan i Gävle,KTH,Signalbehandling,ACCESS Linnaeus Centre,Elektronik
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- Van Moer, Wendy (författare)
- Vrije Universiteit Brussel, ELEC department
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- Björsell, Niclas (författare)
- Högskolan i Gävle,Elektronik
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- Barbé, Kurt (författare)
- Vrije Universiteit Brussel, ELEC department
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- Händel, Peter, 1962- (författare)
- KTH,Signalbehandling,ACCESS Linnaeus Centre,Royal Insstitute of Technology, Signal Processing Lab
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(creator_code:org_t)
- 2012
- 2012
- Engelska.
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Ingår i: IEEE Transactions on Instrumentation and Measurement. - 0018-9456 .- 1557-9662. ; 61:11, s. 2960-2971
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- In this paper, a prototype setup for measuring wideband periodic waveforms whose bandwidth surpasses the analog bandwidth of a radio-frequency receiver is presented. Three major challenges arise in the analog-to-digital stage when measuring such wideband waveforms: the availability of a high sampling rate based on a good amplitude resolution; the availability of the required analog bandwidth to capture the full waveform; and achieving the previous requirements in a cheap way. Those challenges are more pronounced when using wideband modulated signals to test nonlinear devices and when measuring/sensing wideband spectra for cognitive radio applications. For periodic signals, undersampling techniques based on the evolved harmonic sampling can be used to reduce the sampling rate requirements while satisfying a good amplitude resolution. For sparse signals, a technique based on channelization and signal separation is proposed. This technique splits the spectrum of the waveform into parallel channels, downconverts them to the analog frequency band of the analog-to-digital converter (ADC), spreads the channel information, sums them, and then digitizes with a single ADC. Using reconstruction algorithms based on l(1)-norm minimization, the information of the parallel channels can be separated. The original wideband spectrum can be then reconstructed after de-embedding of the channelization process.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- Channelization
- harmonic sampling
- l(1)-norm minimization
- radio-frequency (RF) measurement systems
- signal separation
- sparse signals
- spectrum reconstruction
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