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The effect of clock jitter on the performance of continuous-time delta-sigma ADC for GNSS signals

Ucar, Alper and Cetin, Ediz and Kale, Izzet (2009) The effect of clock jitter on the performance of continuous-time delta-sigma ADC for GNSS signals. In: Proceedings of the European Navigation Conference (ENC-GNSS’09), 03 - 06 May 2009, Naples, Italy.

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Official URL: http://www.enc-gnss09.it/proceedingsPDF/B3/9_B3.pd...

Abstract

Next generation Global Navigation Satellite System (GNSS) receivers will operate in multiple navigation bands. An efficient way to achieve this with lower power and cost is to employ BandPass Sampling (BPS); nevertheless, the sampling operation injects large amounts of jitter noise, which degrades the performance of the receiver. Continuous–Time (CT) Delta–Sigma (ΔΣ) modulators are capable of suppressing this noise but the impact of clock jitter at the output of the Digital– to–Analog Converter (DAC) in the feedback path of the modulator should be taken into account. This paper presents an analytical approach for describing clock jitter in GNSS receivers when a CT–ΔΣ modulator is utilized for Analog–to–Digital Conversion (ADC). The validity of the presented approach is verified through time–domain simulations using a behavioural model of the fourth–order CT–ΔΣ modulator with 1–bit NRZ DAC feedback pulse.

Item Type:Conference or Workshop Item (Paper)
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:7418
Deposited On:29 Jan 2010 12:06
Last Modified:29 Jan 2010 12:06

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