The radio frequency system-on-a-chip (RFSoC) has recently become a viable candidate for completely replacing traditional analog and digital front ends, facilitating the development of wideband phased-array systems where the modern-day RFSoC takes the comprehensive, dominate role in the architecture of the array. Wideband phased-array systems require high-fidelity compensation techniques capable of correcting imbalanced and dispersive channel effects for effective beamforming. This article provides solutions to these challenges by designing a wideband equalizer for a sub-Nyquist-sampled 1.6-GHz S-band phased-array system implemented on a Xilinx 8-channel RFSoC, whose analog-to-digital converters (ADC) operate at 4 gigasamples per second. In brief, an RFSoC is a unique, state-of-the-art, highly integrated device that incorporates a field programmable gate array, high-speed ADCs and digital-to-analog converters with a system-on-a-chip architecture on a single monolithic device. By definition, true time delay beamsteering can be implemented digitally via a combination of integer-sample delays and fractional-sample delay finite impulse response filters. By modifying the filter structure of the fractional-sample delay filter bank to support complex coefficients, channel equalization is integrated with fractional-sample delay filters to mitigate undesired channel effects. For the first time, to the best of our knowledge, this article has developed an equalizer design methodology for an uncalibrated 8-element RFSoC-based sub-Nyquist-sampled wideband beamformer. Lab measurements confirm efficacy.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Least-Squares Equalizer Demonstrations Using a Full-Digital Bandwidth Sub-Nyquist-Sampled Wideband Beamformer on an RFSoC


    Beteiligte:
    Steiner, Kyle (Autor:in) / Yeary, Mark (Autor:in)


    Erscheinungsdatum :

    01.12.2022


    Format / Umfang :

    11835902 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Optical Nyquist Filtering for Elastic OTDM Signals: Fundamentals and Demonstrations

    Tan, Hung Nguyen / Inoue, Takashi / Tanizawa, Ken et al. | British Library Online Contents | 2015


    An Optically Sampled Wideband Digital Receiver

    Joudawlkis, P. W. / Hargreaves, J. J. / Younger, R. D. et al. | British Library Conference Proceedings | 2001


    An optically sampled wideband digital receiver

    Juodawlkis, P.W. / Hargreaves, J.J. / Younger, R.D. et al. | IEEE | 2002


    On least-squares digital contour smoothing

    Glasa, J. / Podhajecky, G. | IEEE | 2003


    On Least-Squares Digital Contour Smoothing

    Glasa, J. / Podhajecky, G. / IEEE | British Library Conference Proceedings | 2003