Title :
Spread-spectrum code and carrier synchronization errors caused by multipath and interference
Author_Institution :
Delft Univ. of Technol.
fDate :
10/1/1993 12:00:00 AM
Abstract :
The influence of multipath propagation and spread-spectrum interference on code and carrier synchronization is investigated. Both coherent and noncoherent delay lock loops (DLLs) are considered, with arbitrary early-late spacings up to one chip time. The coherent DLL is shown to have a major advantage; for a relatively high fading bandwidth, it has negligible tracking errors, while a noncoherent DLL always has a certain bias error. The results are particularly interesting for spread-spectrum positioning systems like Global Positioning System (GPS) and GLONASS
Keywords :
error analysis; fading; interference (signal); radionavigation; satellite relay systems; spread spectrum communication; synchronisation; GLONASS; GPS; Global Positioning System; carrier synchronization errors; coherent delay lock loop; fading; filtering; interference; multipath propagation; noncoherent delay lock loops; spread-spectrum interference; spread-spectrum positioning; tracking errors; Bandwidth; Fading; Global Positioning System; Interference; Rivers; Sensor fusion; Spread spectrum communication; Strategic planning; Upper bound; Vehicle detection;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
