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Implementation of a Multi-frequency GNSS Signal Collecting System Based on Direct-RF Sampling

Honglei Qin

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Abstract

A multi-frequency signal collecting system is designed.The system uses RF direct-sampling without mixing and samples the multi-frequency signals at the same time.After optical filtering,it collects the multi-frequency signals simultaneously through the Ethernet.This design can not only make the system simple and flexible,but also decrease the interference of the analog components.Experimental results show that the system can continuously collect data from multiple frequencies,which verifies the feasibility of the system by capturing the COMPSS signals.

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What this paper is about

A multi-frequency signal collecting system is designed.The system uses RF direct-sampling without mixing and samples the multi-frequency signals at the same time.After optical filtering,it collects the multi-frequency signals simultaneously through the Ethernet.This design can not only make the system simple and flexible,but also decrease the interference of the analog components.Experimental results show that the system can continuously collect data from multiple frequencies,which verifies the feasibility of the system by capturing the COMPSS signals.

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Available abstract

A multi-frequency signal collecting system is designed.The system uses RF direct-sampling without mixing and samples the multi-frequency signals at the same time.After optical filtering,it collects the multi-frequency signals simultaneously through the Ethernet.This design can not only make the system simple and flexible,but also decrease the interference of the analog components.Experimental results show that the system can continuously collect data from multiple frequencies,which verifies the feasibility of the system by capturing the COMPSS signals.

Key concepts: GNSS applications, SIGNAL (programming language), Radio frequency, Sampling (signal processing), Computer science, Electronic engineering, Interference (communication), Undersampling

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