Enhanced Multi-GNSS PVT Solution When Using Chip Scale Atomic Clocks

Krawinkel, Thomas; Schön, Steffen

doi:10.33012/2016.14745

Cited by 2 publications

(3 citation statements)

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“…In order to avoid discontinuities between consecutive modeling segments, their slopes can be constrained according to the stability of the oscillator in use. This approach is applicable in both batch and sequential LSAs as shown by Weinbach (2013) and Krawinkel (2018), respectively.…”

Section: Receiver Clock Modelingmentioning

confidence: 99%

“…This means that in applications using carrier phase observations such as precise point positioning (PPP) (Zumberge et al., 1997), RCM is only feasible if a highly stable oscillator like a hydrogen maser is used (Wang & Rothacher, 2013; Weinbach, 2013; Weinbach & Schön, 2015). On the other hand, when using code observations, meaningful RCM can be applied with much smaller but still very stable oscillators like a chip‐scale atomic clock (CSAC) (Krawinkel, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Improved high‐precision GNSS navigation with a passive hydrogen maser

Krawinkel

Schön

2021

NAVIGATION

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Receiver clock modeling (RCM) based on code observations requires a chip‐scale atomic clock to improve the PVT solution. When using carrier phase observations, a more stable oscillator like a passive hydrogen maser (PHM) is necessary. We applied a PHM in an automotive experiment of about 80 minutes in an urban environment recording 10 Hz multi‐GNSS data. Modeling the clock process noise in a linearized Kalman filter according to the spectral behavior of the PHM (i.e., RCM), improves position and velocity regarding precision and accuracy by 15% and 57%, respectively, as well as reliability by 30%. In situations with sparse, geometrically unfavorable observations, RCM prevents large position drifts. The convergence time of the carrier phase ambiguities is not affected. Conclusively, precision, accuracy, and reliability in kinematic precise point positioning can be improved by using an oscillator like a PHM. Future advancements in clock technology should make this approach more feasible for ordinary use cases.

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Section: Receiver Clock Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improved high‐precision GNSS navigation with a passive hydrogen maser

Krawinkel

Schön

2021

NAVIGATION

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“…High-end oscillators, such as very stable Oven Controlled Crystal Oscillators (OCXOs), caesium and rubidium atomic oscillators, and the recently developed chip-scale atomic clocks, have proved to exhibit high performance in various aspects of GNSS receivers (Weinbach and Schön, 2011; Yeh et al, 2013; Gowdayyanadoddi et al, 2014; Krawinkel and Schön, 2015). Most receivers, however, use Temperature Compensated Crystal Oscillators (TCXOs) as their frequency reference.…”

Section: Introductionmentioning

confidence: 99%

GNSS IF Signal Simulation Considering Oscillator Phase Noise

2018

J. Navigation

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Oscillator phase noise has a negative effect on the tracking performance of Global Navigation Satellite System (GNSS) receivers. To provide GNSS software receivers with real test environments, this paper proposes a method to simulate the GNSS Intermediate Frequency (IF) signal, taking the oscillator phase noise effect into consideration. The oscillator parameters are first measured via a pseudolite transmitter and receiver system. According to the measured oscillator parameters, an oscillator-induced frequency fluctuation is then generated, and added to the digital IF signal. Further simulation experiments are conducted that attempt to measure the oscillator phase noise effect on a second-order Phase Lock Loop (PLL) performance. Results indicate that the IF signal simulator considering the oscillator phase noise is able to provide software receivers with real signal dynamics, helping to evaluate the performance of signal processing algorithms on a software platform.

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Enhanced Multi-GNSS PVT Solution When Using Chip Scale Atomic Clocks

Cited by 2 publications

References 0 publications

Improved high‐precision GNSS navigation with a passive hydrogen maser

Improved high‐precision GNSS navigation with a passive hydrogen maser

GNSS IF Signal Simulation Considering Oscillator Phase Noise

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