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2010•Journal of Chinese Inertial TechnologyRequires access

Compatibility of multi-frequency signal sampling for GNSS RF front-end

Guo Lishu

Open publisher page 1 citations

Abstract

A sampling frequency compatibility algorithm for multi signals in radio frequency (RF) front-end is put forward to address the conflict problem among GNSS signals with different frequencies.The structures of RF front-end in the GNSS receivers are analyzed,which shows that the RF direct digitalization structure based on bandpass sampling is suitable for multi-band GNSS software receivers.Utilizing this structure,a sampling processing method for multi-band GNSS RF signals is put forward considering the compatibility of multi-band sampling frequencies,no signals aliasing after sampling,and the requirements of actual working environment.The simulations are made by applying this algorithm to achieve the compatible sampling of GPS L1,L2C and Galileo E5a,and the results show that the lower sampling frequency is beneficial to the system design of receivers when involved with long-code sampling compatibility.

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What this paper is about

A sampling frequency compatibility algorithm for multi signals in radio frequency (RF) front-end is put forward to address the conflict problem among GNSS signals with different frequencies.The structures of RF front-end in the GNSS receivers are analyzed,which shows that the RF direct digitalization structure based on bandpass sampling is suitable for multi-band GNSS software receivers.Utilizing this structure,a sampling processing method for multi-band GNSS RF signals is put forward considering the compatibility of multi-band sampling frequencies,no signals aliasing after sampling,and the requirements of actual working environment.The simulations are made by applying this algorithm to achieve the compatible sampling of GPS L1,L2C and Galileo E5a,and the results show that the lower sampling frequency is beneficial to the system design of receivers when involved with long-code sampling compatibility.

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Available abstract

A sampling frequency compatibility algorithm for multi signals in radio frequency (RF) front-end is put forward to address the conflict problem among GNSS signals with different frequencies.The structures of RF front-end in the GNSS receivers are analyzed,which shows that the RF direct digitalization structure based on bandpass sampling is suitable for multi-band GNSS software receivers.Utilizing this structure,a sampling processing method for multi-band GNSS RF signals is put forward considering the compatibility of multi-band sampling frequencies,no signals aliasing after sampling,and the requirements of actual working environment.The simulations are made by applying this algorithm to achieve the compatible sampling of GPS L1,L2C and Galileo E5a,and the results show that the lower sampling frequency is beneficial to the system design of receivers when involved with long-code sampling compatibility.

Key concepts: GNSS applications, Radio frequency, Computer science, Sampling (signal processing), Global Positioning System, Electronic engineering, Compatibility (geochemistry), RF front end

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