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In this paper, we proposed adaptive code decision algorithm for real-time signal generation. Until now, we have been tested to verify the performance and functionality of receiver using hardware GNSS signal simulator. But they are very expensive, may not be available for the signals of interest and consequently might not be always suitable for specialized research due to their lack of flexibility...
In this paper, we compared and analyzed the performance of generated GPS signal by GPS L1 signal generator with Live GPS signal using the U-Blox receiver. Generally GPS Receiver calculates the position of the satellite by using the ephemeris data received from GPS satellites, and calculates the position of the receiver using the pseudorange. GPS satellites, so it is synchronized, it will then transmit...
In this paper, we introduce the type of spoofing signal and the method of spoofing mitigation. The spoofing has three type: simplistic, intermediate, sophisticated and we will be interested in the intermediate spoofing. The intermediate spoofers synchronize its counterfeit GNSS signals with the current broadcast GNSS signals. So, if the receiver is attacked by a spoofer, it should be able to detect...
ETRI is involved in developing technologies of GNSS ground infrastructure and next generation search and rescue beacon from 2007 up to 2010. In this paper, we are going to develop signal acquisition, tracking and data decoding algorithm about GPS L5 frequency band. We investigate cold start acquisition schemes by using a FFT algorithm for a GPS L5 software receiver. Since GPS L5 signal is BPSK modulation,...
GNSS Digitized IF Signal Simulator (GDISS) is being developed by ETRI as a part of development of software- based Test & Evaluation Facility which will provide test and evaluation environment for various software level application and navigation algorithm in GNSS. GDISS will provide digitized IF data of GPS and Galileo signals. In this paper, GDISS prototype for L1, L2C, and E1(B&C) is developed...
Modernized GPS and Galileo system will be available to civil users, thus there is a need for unified platform that can receive multi-frequency signals of Galileo/GPS to develop and test a variety of applications. ETRI involved in developing technologies of GNSS ground infrastructure and next generation search and rescue beacon from 2007 up to 2010. We are going to develop high performance S/W receiver...
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