NAVSTAR Global Positioning Systems Special Studies and Engineering Program. Volume II. Generalized Cross-Correlation Properties of GPS Codes in Cases of Differential Doppler Shifts. GPS/Trident Code Design.

摘要

This volume deals with the generalized cross-correlation of properties of the GPS Clear signals in the case of differential doppler shifts. It also addresses modified GPS-like codes that were designed for use for the GPS/TRIDENT SATRACK system. The cross-correlation properties of the GPS C/A in the case of zero doppler shift is well known. This report addresses the case where finite Doppler shifts are involved. The SATRACK system requires a good ranging code which also is a good spectrum-spreading multiple access code that has very small interference or cross-correlation with the GPS codes. This report addresses such codes. (Author)