GPS time transfer

Lewandowski, W.; Thomas, C.

doi:10.1109/5.84976

Cited by 142 publications

(60 citation statements)

References 10 publications

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“…Since the PPS signal among different MCHs is synchronized, the Ref Clock and Sync Pulse in each chassis is phase matched at any given time. In case that all of the MCHs are using the PPS from the same satellites, the synchronization accuracy is between 5 and 20 ns [30]. However, when the GPS signal is inaccessible or lost, the front-end subsystem should be able to stay synchronized by sharing the Sync Pulse from a common source, which could be an external chassis clock generator or a signal from one of the chassis.…”

Section: Backend Synchronizationmentioning

confidence: 99%

An Implementation of Real-Time Phased Array Radar Fundamental Functions on a DSP-Focused, High-Performance, Embedded Computing Platform

Zhang

Patel

et al. 2016

Aerospace

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This paper investigates the feasibility of a backend design for real-time, multiple-channel processing digital phased array system, particularly for high-performance embedded computing platforms constructed of general purpose digital signal processors. First, we obtained the lab-scale backend performance benchmark from simulating beamforming, pulse compression, and Doppler filtering based on a Micro Telecom Computing Architecture (MTCA) chassis using the Serial RapidIO protocol in backplane communication. Next, a field-scale demonstrator of a multifunctional phased array radar is emulated by using the similar configuration. Interestingly, the performance of a barebones design is compared to that of emerging tools that systematically take advantage of parallelism and multicore capabilities, including the Open Computing Language.

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Section: Backend Synchronizationmentioning

confidence: 99%

An Implementation of Real-Time Phased Array Radar Fundamental Functions on a DSP-Focused, High-Performance, Embedded Computing Platform

Zhang

Patel

et al. 2016

Aerospace

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“…GPS time transfer between the worldwide timing centers and the scientific community use another technique known as Common View (CV) and its variant, Carrier Phase Common View [39,50]. This technique is fundamentally a point-to-point technique rather than a general broadcast as in the passive reception case discussed above.…”

Section: Common View Gps Time Transfermentioning

confidence: 99%

“…This passive technique is the primary mode of time transfer operation for the military user [39,45]. As a passive service, the GPS broadcasts are available over a wide area independent of the user's position for reception.…”

Section: Passive Gps Time Transfermentioning

confidence: 99%

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Common Time Reference for Naval Systems

Beard¹,

White²,

Detoma³

et al. 2004

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Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Ronald Beard PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S REPORT NUMBER(S) 202-404-7054A Common Time Reference (CTR) is a critical factor in the development of new force capabilities, and perhaps the most difficult to achieve without dependence upon GPS. A technical architecture linking the systems on a common reference framework using their existing time and frequency standards was examined as the most effective approach to achieving interoperable systems. To build an inter-systems architecture within the existing system and platform infrastructure will require a fundamental change in adopting interoperable interfaces and more extensive management of the fabric of technical parameters. The foundation of this new architecture can be built upon the existing infrastructure distributed throughout the legacy and developing systems. The means of providing the elements for this architecture and supporting infrastructure is the objective of this report. The interconnection of assets provides the means for synchronization and coherent system operation.

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“…The amount of jitter can be reduced by averaging the time values received simultaneously from different satellites over a certain time interval (e.g. 24 hours) [13]. While the latter approach is essential for fundamental metrological purposes [14]- [15], a jitter of about ±100 ns is suitable in most consumer and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

A Digital Circuit for Jitter Reduction of GPS-disciplined 1-pps Synchronization Signals

Gasparini

Zadedyurina

Fontana

et al. 2007

2007 IEEE International Workshop on Advanced Methods for Uncertainty Estimation in Measurement

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-The Global Positioning System (GPS) satellites transfer accurate time from atomic clocks, thus enabling the receivers on Earth to produce high-stability synchronization signals (i.e., trains of low-jitter pulses without drift). The timing accuracy of the generated stream of pulses depends on the features as well as on the cost of the specific GPS receiver employed. This paper describes a fully digital synchronization circuit that is able to reduce the jitter associated to the 1 pulse per second (1-pps) signal generated by a typical low-cost receiver of moderate timing accuracy within a short settling time interval. The proposed circuit has been implemented using an FPGA and the jitter reduction has been estimated experimentally.

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GPS time transfer

Cited by 142 publications

References 10 publications

An Implementation of Real-Time Phased Array Radar Fundamental Functions on a DSP-Focused, High-Performance, Embedded Computing Platform

An Implementation of Real-Time Phased Array Radar Fundamental Functions on a DSP-Focused, High-Performance, Embedded Computing Platform

Common Time Reference for Naval Systems

A Digital Circuit for Jitter Reduction of GPS-disciplined 1-pps Synchronization Signals

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