Dual-Band, Two-Layer Millimeter-Wave Transceiver for Hybrid MIMO Systems
Dual-Band, Two-Layer Millimeter-Wave Transceiver for Hybrid MIMO Systems
复制标题
适用于混合 MIMO 系统的双频段、两层毫米波收发器
DOI：
10.1109/jssc.2021.3110520
复制
发表时间：
2021
影响因子：
5.4
通讯作者：
Paramesh, Jeyanandh
中科院分区：
文献类型：
--
作者：
Mondal, Susnata;Carley, Larry Richard;Paramesh, Jeyanandh
本文提出了一种两层低复杂度全连接 (FC) 射频/模拟加权多输入多输出 (MIMO) 收发器，包括射频权重层和模拟基带权重层。该收发器本身可以用作小规模 MIMO 系统，也可以用作更大的混合 MIMO 系统中的构建块。该架构减轻了现有 MIMO 架构的复杂性与频谱效率权衡，并实现了 MIMO 流/用户可扩展性、卓越的能源效率和空间处理灵活性。引入了紧凑的可重构双向电路架构，包括新的笛卡尔组合/分离波束成形接收器/发射器、双频带双向波束成形网络、双频带频率转换链以及具有改进的可编程增益放大器设计的基带笛卡尔波束成形。 28/37 GHz 频段、两层、八元件、四流混合 MIMO 收发器原型采用 65 nm CMOS 设计，以演示上述功能。该原型在两个同步频段中实现了精确的波束/零点转向能力、出色的面积/功率效率和最先进的 TX/RX 模式性能，同时使用所提出的节能两层混合波束成形方案演示了多天线（最多八个）多流（最多四个）空中空间复用操作。
This article presents a two-layer low-complexity fully connected (FC) RF/analog weighting multi-input–multi-output (MIMO) transceiver comprising an RF weight layer and an analog–baseband weight layer. The transceiver can serve as a small-scale MIMO system by itself and can serve as the building block in a larger hybrid MIMO system. The architecture mitigates the complexity versus spectral-efficiency tradeoffs of existing MIMO architectures and enables MIMO stream/user scalability, superior energy efficiency, and spatial-processing flexibility. A compact, reconfigurable bidirectional circuit architecture is introduced, including a new Cartesian-combining/splitting beamforming receiver/transmitter, dual-band bidirectional beamforming network, dual-band frequency translation chains, and baseband Cartesian beamforming with an improved programmable gain amplifier design. A 28-/37-GHz band, two-layer, eight-element, four-stream hybrid MIMO transceiver prototype is designed in 65-nm CMOS to demonstrate the above features. The prototype achieves accurate beam/null-steering capability, excellent area/power efficiency, and state-of-the-art TX/RX mode performance in two simultaneous bands while demonstrating multi-antenna (up to eight) multi-stream (up to four) over-the-air spatial multiplexing operation using the proposed energy-efficient two-layer hybrid beamforming scheme.