A Dual-Frequency RF Front-End for Long Antenna-GPSReceiver Links

摘要

While the Global Positioning System (GPS) is best knownrnfor its positioning applications, another way to use GPS is as arntime reference for telecommunication networks synchronization.rnHowever, as every new communication standard is morerndemanding, the precision of the current single-frequency GPSrnbased network synchronization solutions is about not to bernsufficient anymore. The dominant source of error in currentrnstate-of-the-art receivers based on the L1 C/A code is duernto the variations of the propagation delay through the ionosphere.rnFortunately, a new GPS civilian signal, L2CS, isrnabout to be released. Combined with the existing L1 signal, itrnwill allow to cancel most of the ionosphere induced error andrntherefore offer better timing signals as compared to classicalrnGPS receivers. In this paper, a dual-frequency front-end forrnlong antenna-GPS receiver links is presented.