Beamforming with Joint Phase and Time Array: System Design, Prototyping and Performance
Abstract
Joint phase-time arrays (JPTA) is a new mmWave radio frequency front-end architecture constructed with appending time-delay elements to phase shifters for analog beamforming. JPTA allows the mmWave base station (BS) to form multiple frequency-dependent beams with a single RF chain, exploiting the extra degrees of freedom the time-delay elements offer. Without requiring extra power-hungry RF chains, a BS with JPTA can schedule multiple users in different directions in a frequency-division multiplexing (FDM) manner. A BS with JPTA achieves various advantages over the traditional analog beamforming system. Simulation results show that JPTA can bring significant system-level benefits, e.g., extending uplink throughput coverage by 100%. To realize these system benefits of JPTA, high-resolution delay elements with a wide delay dynamic range are essential. With newly developed delay elements, we demonstrate that a single TRX RF chain can serve four users in four different directions in the mmWave band.
Cite
@article{arxiv.2502.00139,
title = {Beamforming with Joint Phase and Time Array: System Design, Prototyping and Performance},
author = {Jianhua Mo and Ahmad AlAmmouri and Shenggang Dong and Younghan Nam and Won-Suk Choi and Gary Xu and Jianzhong and Zhan},
journal= {arXiv preprint arXiv:2502.00139},
year = {2025}
}
Comments
Presented at Asilomar Conference on Signals, Systems, and Computers 2024