Receiver tracking loops are implemented in software in modern space-borne radios. Software implementation allows loop designs to be modified in flight. Not only filter coefficients and gain, but also loop order and type can be modified. This flexibility enables new cognitive and autonomous capabilities. Loop designs can be optimized for each mission phase, and separate loops can be used for acquisition and tracking. Furthermore, the loops can be automatically adapted based on changing signal dynamics or SNR. However, if the loop has tracked away from its quiescent state, the loop will lose lock when the switch occurs unless the internal state of the loop is translated appropriately. This paper considers the internal state of feedback tracking loops. In particular, a physical interpretation of loop state is derived that enables translating the loop state from one design to another. Limitations to autonomous switching, including high-order signal states and noise, are described, and several examples are simulated. Practical applications for both near-earth and deep-space missions are discussed.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Autonomous loop switching: Interpreting and modifying the internal state of feedback tracking loops


    Beteiligte:


    Erscheinungsdatum :

    2012-03-01


    Format / Umfang :

    590442 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Modifying the behavior of an autonomous vehicle using context based parameter switching

    ZHU JIAJUN / URMSON CHRISTOPHER / FERGUSON DAVID I et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    FEEDBACK BY MODIFYING STIFFNESS

    JAIME ELLIOT NAHMAN / STEFAN MARTI / DAVIDE DI CENSO et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    FEEDBACK BY MODIFYING STIFFNESS

    JAIME ELLIOT NAHMAN / STEFAN MARTI / DAVIDE DI CENSO et al. | Europäisches Patentamt | 2016

    Freier Zugriff

    FEEDBACK BY MODIFYING STIFFNESS

    NAHMAN JAIME ELLIOT / MARTI STEFAN / DI CENSO DAVIDE et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    FEEDBACK BY MODIFYING STIFFNESS

    NAHMAN JAIME ELLIOT / MARTI STEFAN / DI CENSO DAVIDE et al. | Europäisches Patentamt | 2016

    Freier Zugriff