High-frequency wideband cellular communications over mmWave and sub-THz offer the opportunity for high data rates. However, it also presents high path loss, resulting in limited coverage. High-gain beamforming from the antenna array is essential to mitigate the coverage limitations. The conventional phased antenna arrays (PAA) cause high scheduling latency owing to analog beam constraints, i.e., only one frequency-flat beam is generated. Recently introduced joint phase-time array (JPTA) architecture, which utilizes both true-time-delay (TTD) units and phase shifters (PSs), alleviates analog beam constraints by creating multiple frequency-dependent beams for scheduling multiple users at different directions in a frequency-division manner. One class of previous studies offered solutions with "rainbow" beams, which tend to allocate a small bandwidth per beam direction. Another class focused on uniform linear array (ULA) antenna architecture, whose frequency-dependent beams were designed along a single axis of either azimuth or elevation direction. This paper presents a novel 3D beamforming design that maximizes beamforming gain toward desired azimuth and elevation directions and across sub-bands partitioned according to scheduled users’ bandwidth requirements. We provide analytical solutions and iterative algorithms to design the PSs and TTD units for a desired subband beam pattern. Through simulations of the beamforming gain, we observe that our proposed solutions outperform the state-of-the-art solutions reported elsewhere.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    3D Beamforming Through Joint Phase-Time Arrays


    Beteiligte:
    Yildiz, Ozlem (Autor:in) / AlAmmouri, Ahmad (Autor:in) / Mo, Jianhua (Autor:in) / Nam, Younghan (Autor:in) / Erkip, Elza (Autor:in) / Zhang, Jianzhong Charlie (Autor:in)


    Erscheinungsdatum :

    07.10.2024


    Format / Umfang :

    879028 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Robust Beamforming in GPS Arrays

    Lorenz, R. G. / Boyd, S. P. / Institute of Navigation | British Library Conference Proceedings | 2002



    Broadband phase mode beamforming for cylindrical arrays - theory and practice

    Griffiths, H. D. / Griffiths, J. W. R. / Eiges, R. et al. | British Library Conference Proceedings | 1993



    Optical Beamforming for Ultrasonic Phased Arrays

    IEEE / Lasers and Electro-Optics Society | British Library Conference Proceedings | 1995