标题： 基于联合相位和时间阵列的波束成形：系统设计、原型制作与性能 显示英文标题

标题： Beamforming with Joint Phase and Time Array: System Design, Prototyping and Performance

摘要： 联合相位-时间数组（JPTA）是一种新的毫米波射频前端架构，通过在相移器上附加时间延迟元件来实现模拟波束成形。 JPTA使毫米波基站（BS）能够通过单个射频链路形成多个频率依赖的波束，利用时间延迟元件提供的额外自由度。 在不需要额外耗电的射频链路的情况下，具有JPTA的基站可以以频分复用（FDM）的方式在不同方向上调度多个用户。 具有JPTA的基站相比传统模拟波束成形系统具有多种优势。 仿真结果表明，JPTA可以带来显著的系统级优势，例如将上行链路吞吐量覆盖范围扩展100%。 为了实现JPTA的这些系统优势，具有宽延迟动态范围的高分辨率延迟元件是必不可少的。 借助新开发的延迟元件，我们证明单个TRX射频链路可以在毫米波频段中为四个不同方向的用户提供服务。 显示英文摘要

摘要： 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.