Results on the effects of digital accumulators in phase and frequency tracking loops are presented. Digital accumulators or summers are used extensively in digital signal processing to perform averaging or to reduce processing rates to acceptable levels. For tracking the Doppler of high-dynamic targets at low carrier-to-noise ratios, it is shown through simulation and experiment that digital accumulators can contribute an additional loss in operating threshold. This loss was not considered in any previous study and needs to be accounted for in performance prediction analysis. Simulation and measurement results are used to characterize the loss due to the digital summers for three different tracking loops: a digital phase-locked loop, a cross-product automatic frequency tracking loop, and an extended Kalman filter. The tracking algorithms are compared with respect to their frequency error performance and their ability to maintain lock during severe maneuvers at various carrier-to-noise ratios. It is shown that failure to account for the effect of accumulators can result in an inaccurate performance prediction, the extent of which depends highly on the algorithm used.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Digital accumulators in phase and frequency tracking loops


    Contributors:


    Publication date :

    1990-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Digital accumulators in phase and frequency tracking loops

    Hinedi, S. / Statman, J.I. | IEEE | 1990


    Digital Accumulators In Phase- And Frequency-Tracking Loops

    Hinedi, Sami / Statman, Joseph I. | NTRS | 1991


    Accumulators

    Michotte, Fe´ / licien | Engineering Index Backfile | 1900


    Bellows‐Type Accumulators for Liquid Metal Loops of Space Reactor Power Systems

    Tournier, Jean‐Michel / El‐Genk, Mohamed S. | American Institute of Physics | 2006


    Bellows-Type Accumulators for Liquid Metal Loops of Space Reactor Power Systems

    Tournier, J.-M. / El-Genk, M. S. / American Institute of Physics | British Library Conference Proceedings | 2006