Performance degradation in GPS-receivers caused by group delay variations of SAW-filters

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.