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This paper presents a general framework for the analysis of dyadic cooperation of finite-state machines (FSMs) performing code acquisition, as applied to navigation and communication spread-spectrum systems. Our aim is to show how code acquisition performance can be improved by relying on the unidirectional or bidirectional exchange of timing information between two FSMs. We develop an analytical...
Interference is the major threat to integrity of navigation systems. In this paper, we provide new approaches to localization and characterization operations of GNSS jamming signals in both cooperative and distributed architectures. As for localization, Differential Received Signal Strength (DRSS) and an Extended Kalman Filter (EKF) are exploited. With respect to characterization, two approaches are...
This paper tackles the issue of code acquisition of Spread Spectrum (SS) signals used for Telemetry, Tracking and Control (TT&C) of satellites operating in the Launch and Early Orbit Phase (LEOP). Peculiar to this scenario is the very low signal to noise plus interference ratio, that requires very accurate frequency estimation during code acquisition in order to guarantee the lock of the tracking...
This paper analyzes the possibility to perform joint frame synchronization and code acquisition for the DVB-RCS mobile system. Since the standard foresees the adoption of Direct Sequence Spread Spectrum techniques, novel detectors able to cope with the scenario at hand are proposed. Comparison in terms of Mean Acquisition Time and complexity are carried out, and the best solution in terms of performance...
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