Title :
Performance degradation in GPS-receivers caused by group delay variations of SAW-filters
Author_Institution :
Daimler-Benz AG, Ulm, Germany
Abstract :
In modern RF-receivers several SAW-filters are used in RF- and IF-stages. The use of SAW-filters is critical with respect to the pseudo-range error after the decorrelation-process. We present a new simulation technique to predict the decorrelation results depending on the group delay characteristics of the filters. This technique allows an improvement of the accuracy of the GPS correlation results and a related optimization of the SAW-filter characteristics.
Keywords :
Global Positioning System; UHF filters; VHF filters; delays; errors; radio receivers; surface acoustic wave filters; GPS correlation results; GPS receivers; RF receivers; SAW filters; filter group delay characteristics; group delay variations; optimization; performance degradation; pseudo-range error; simulation technique; Bandwidth; Decorrelation; Degradation; Delay; Filters; Frequency; Global Positioning System; Phase measurement; Satellites; Semiconductor device measurement;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705040
