Beamforming with Joint Phase and Time Array: System Design, Prototyping and Performance
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909471835422720 |
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| author | Mo, Jianhua AlAmmouri, Ahmad Dong, Shenggang Nam, Younghan Choi, Won-Suk Xu, Gary Jianzhong Zhan |
| author_facet | Mo, Jianhua AlAmmouri, Ahmad Dong, Shenggang Nam, Younghan Choi, Won-Suk Xu, Gary Jianzhong Zhan |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00139 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Beamforming with Joint Phase and Time Array: System Design, Prototyping and Performance Mo, Jianhua AlAmmouri, Ahmad Dong, Shenggang Nam, Younghan Choi, Won-Suk Xu, Gary Jianzhong Zhan Information Theory Signal Processing 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. |
| title | Beamforming with Joint Phase and Time Array: System Design, Prototyping and Performance |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2502.00139 |