Analysis of Satellite Timing and Navigation Receiver Pseudorange Biases due to Spreading Code Puncturing and Phase Optimized Constant Envelope Transmission
Technical Report,01 Sep 2017,21 Mar 2019
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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There is a desire for future GPS satellites to be software-defined to enable greater operational flexibility and adapt to a variety of current and future threats. This includes implementing new modulation techniques such as phase optimized constant envelope transmission POCET and asymmetric signal authentication methods such as chips message robust authentication Chimera. Any new GPS signal transmitted must be backwards compatible with the millions of receivers already in use. This thesis shows a variety of tests performed to demonstrate the effects of Chimera and POCET-enabled signals. It is shown through actual radio frequency signal generation, testing the response of current-generation high accuracy commercial off-the-shelf GPS receivers to these signals, that both Chimera and POCET, as implemented in a GPS signal constellation, are backwards compatible.
- Navigation and Guidance
- Unmanned Spacecraft
- Electrical and Electronic Equipment