GPS World, August 2015
SVN49 IN SPACE artists rendering The signal anomaly from SVN 49 alerted researchers to new possibilities in analysis and monitoring A Satellite with Personality Chip Transition Edge Based Signal Tracking for Ultra Precise GNSS Monitoring Applications Tracking GNSS signals using their underlying spreading sequence chip transition edges reveals positive versus negative chip asymmetries that are characteristic to each satellite This asymmetry is due to various types of natural signal deformation that is known to occur within the satellites signal generation and transmission hardware This novel concept of monitoring chip asymmetry can extend the state of the art in the areas of GNSS signal quality monitoring and authentication A technique to directly monitor chip asymmetry within a specially designed ChipShape GNSS receiver architecture employs separate code discriminators that align themselves to the chip rising edge and falling edge zero crossings Sanjeev Gunawardena John Raquet and Frank van Graas GPS World August 2015 www gpsworld com 38
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