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- W2185088905 abstract "The combined use of proposed GALILEO signals and current and also future GPS signals will help users to greatly improve positioning accuracy, continuity of service, availability and integrity. The performances brought by all these signals are degraded by the same perturbations such as multipath, effects of ionosphere or jamming. However, differences in signal designs and environments imply differences in protection against these perturbations. One type of critical criterion is the set of the key operations thresholds in receivers such as acquisition, tracking and data demodulation. The aim of the submitted paper is to propose required signal power to noise spectral density ratio to perform acquisition, tracking and data demodulation given desired performances. Some of the considered performances are acquisition false alarm, detection probabilities, mean acquisition time and bit error rate. These thresholds are computed for GPS L5 and Galileo E5a/E5b signals. The paper starts with a brief review of studied signal relevant characteristics such as central frequency, code frequency and period, data rate and used coding and minimum received C/N0. After this, the second part is dedicated to the presentation of the different methods that can be used for acquisition, tracking and data demodulation thresholds computation. These thresholds take into account some degradations originating from the front end bandwidth, the tracking errors and acquisition times. Intrasystem and intersystem interference are considered through the use of the interference coefficient. Benefits from pilot channels and data coding are also highlighted. Obtained results enable to estimate C/N0 margins with respect to minimal available C/N0 for different GNSS signals" @default.
- W2185088905 created "2016-06-24" @default.
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- W2185088905 date "2002-09-24" @default.
- W2185088905 modified "2023-09-24" @default.
- W2185088905 title "Analysis of L5/E5 acquisition, tracking and data demodulation thresholds" @default.
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