A novel analog circuit for adaptive beamforming in an ultra low profile stair-planar phased array antenna system for mobile broadcast satellite reception in Ku-band is presented and its performance experimentally compared with digital beamforming control. The novelty of this method is that it performs gradient descent using an entirely analog feedback path. The beamforming algorithm compensates for the fabrication inaccuracies of the microwave components and variations in their characteristics due to ambient changes. Neither a priori knowledge of the satellite's direction nor the phase-voltage characteristic of the phase shifters are required in this implementation which results in eliminating an expensive laborious calibration procedure. The circuit performs continuous-time gradient descent using simultaneous perturbation gradient estimation. Field tests were performed in a realistic scenario using a satellite signal. The optimizer can converge in less than 50 ms and easily tracks antenna motions of greater than 60°/s. There are significant savings in terms of system cost, power consumption, and system integration complexity by switching to an integrated analog implementation.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Zero-Knowledge Adaptive Beamforming using Analog Signal Processor for Satellite Tracking Applications with an Experimental Comparison to a Digital Implementation


    Beteiligte:
    Hossu, M (Autor:in) / Jamali, S H (Autor:in) / Mousavi, P (Autor:in) / Narimani, K (Autor:in) / Fakharzadeh, M (Autor:in) / Safavi-Naeini, S (Autor:in)


    Erscheinungsdatum :

    2010-07-01


    Format / Umfang :

    2864521 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Graceful degradation of an adaptive beamforming processor

    Heiligman, G.M. / Purdy, R.J. | IEEE | 1992


    Advantages and Capabilities of a Beamforming Satellite with Space-Based Digital Processor (AIAA 2014-4321)

    Marshack, D. / Freedman, J. / Kaplan, T. et al. | British Library Conference Proceedings | 2014


    FPGA Implementation of the Adaptive Digital Beamforming for Massive Array

    Lopes, Felipe F. / Silva, Sergio N. / Fernandes, Marcelo A. C. | IEEE | 2021


    M-CMA for Digital Signal Processing Adaptive Antennas with Microwave Beamforming

    Denno, S. / Ohira, T. / Institute of Electrical and Electronics Engineers | British Library Conference Proceedings | 2000