Implementation of a local oscillator steering system with adjustable bandwidth using time-varying reference signals
Precise time synchronization is essential for navigation and positioning, as well as for the components of a bistatic radar. Any drift or time difference between local oscillators (LOs) can lead to significant performance degradation. Furthermore, for moving platforms, the continuously changing prop...
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| Formato: | tesis de maestría |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/457219 |
| Acesso em linha: | https://hdl.handle.net/2117/457219 |
| Access Level: | acceso embargado |
| Palavra-chave: | Voltage-controlled oscillators Clocks and watches--Repairing Synchronization Clock synchronization Local oscilators Real trajectories Control Oscil·ladors de voltatge controlat Rellotges--Reparació Sincronització Àrees temàtiques de la UPC::Enginyeria elèctrica::Maquinària i aparells elèctrics::Oscil·ladors elèctrics |
| Resumo: | Precise time synchronization is essential for navigation and positioning, as well as for the components of a bistatic radar. Any drift or time difference between local oscillators (LOs) can lead to significant performance degradation. Furthermore, for moving platforms, the continuously changing propagation delay of the medium introduces uncertainty in the time transfer measurements between radar platform pairs. These uncertainties lead to time offsets between LOs, impairing the operation of the overall system. The main goal of this project is to synchronize two real clocks mounted on moving platforms. The proposed implementation combines the simulation of trajectories with the emulation of the clock behavior as if they were moving, but operating under static laboratory conditions. Synchronization is achieved by transmitting a pulse derived from the master clock signal to an adjustable one. Due to the variable baseline between platforms, the received signal experiences a non-constant propagation delay, resulting in an inaccurate reconstruction of the reference clock at the receiver side. This issue is mitigated by estimating the baseline in order to compensate for the delay effect. Once the receiver obtains the estimated reference clock signal, both clocks are compared. The implemented control algorithm, adjusts the frequency of the slave clock to match the reference, minimizing the timing error between the clock pair. |
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