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Chinese satellite navigation system Beidou is growing rapidly. Consequently, development of Beidou navigation system (BDS) receiver is necessary. BDS signal generator is fundamental equipment for research and verification of Beidou receiver, which can provide stable and reliable experimental environment. On the basis of mathematical model of BDS IF(Intermediate Frequency) signal, this paper analyzes...
In some special circumstance such as local conflict area or thick forests, the signal availability to the GPS receiver may greatly be decreased, and this will accordingly degrade the performance of the receiver. To improve this problem, we present a method to augment the GPS signal availability utilizing the navigation signal retransmission via the geosynchronous communications satellite (GEO comsat)...
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