On Backward Compatibility in GNSS Signal Design

Abstract

This work further develops tools and methodologies for systematic GNSS signal design. Inter and intra system multiple access interference (MAI), synchronization accuracy, time-delay estimation robustness, and backward compatibility with respect to already existing signals are considered by solving a nonlinear multi-objective optimization problem. Final solutions are selected out of the derived Pareto optimal set and their performance in terms of Cramer Rao lower bound (CRLB) for time-delay estimation considering inter and intra MAI is assessed. Furthermore, implementation aspects with respect to signal generation on the payload and with respect to processing in the receiver including multipath behavior are analyzed.