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Noise performance comparison between two different types of time-domain systems for microwave detection

Published online by Cambridge University Press:  27 April 2016

Xuezhi Zeng ,
Albert Monteith ,
Andreas Fhager ,
Mikael Persson  and
Herbert Zirath
Xuezhi Zeng*
Affiliation:
Department of Signals and Systems, Chalmers University of Technology, 412 96 Gothenburg, Sweden. Phone: +46 031 772 1613
Albert Monteith
Affiliation:
Department of Earth and Space Sciences, Chalmers University of Technology, 412 96 Gothenburg, Sweden
Andreas Fhager
Affiliation:
Department of Signals and Systems, Chalmers University of Technology, 412 96 Gothenburg, Sweden. Phone: +46 031 772 1613
Mikael Persson
Affiliation:
Department of Signals and Systems, Chalmers University of Technology, 412 96 Gothenburg, Sweden. Phone: +46 031 772 1613
Herbert Zirath
Affiliation:
Department of Microtechnology and Nanoscience, Chalmers University of Technology, 412 96 Gothenburg, Sweden
*
Corresponding author:X. Zeng, Email: xuezhi@chalmers.se
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Abstract

This paper compares the noise performance of two different types of time-domain microwave detection systems: a pulsed system and a pseudo-random noise sequence system. System-level simulations and laboratory-based measurements are carried out in the study. Results show that the effect of timing jitter is more significant on the measurement accuracy of the pseudo-random noise sequence system than that of the pulsed system. Although the signal power density of the pseudo-random sequence system is tens of dBs higher than that of the pulsed system over the frequency band of interest, the signal-to-noise ratio difference between these two systems can be just a few dBs or even smaller depending on the jitter level.

Keywords

Microwave measurementsQuality of life/medical diagnosis and imaging systems
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 3 , April 2017 , pp. 535 - 542
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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