A 24.5-43.5-GHz Ultra-Compact CMOS Receiver Front End With Calibration-Free Instantaneous Full-Band Image Rejection for Multiband 5G Massive MIMO
A 24.5-43.5-GHz Ultra-Compact CMOS Receiver Front End With Calibration-Free Instantaneous Full-Band Image Rejection for Multiband 5G Massive MIMO
复制标题
DOI：
10.1109/jssc.2019.2959495
复制
发表时间：
2020-05-01
影响因子：
5.4
通讯作者：
Wang, Hua
中科院分区：
文献类型：
--
作者：
Huang, Min-Yu;Chi, Taiyun;Wang, Hua
本文介绍了一种极宽带24.5-43.5 GHz接收机（RX），实现32-56 dB瞬时全频段镜像抑制（IR），支持24.5/28/37/39/43 GHz的多个主要毫米波5G频段。提出了一种基于变压器的紧凑型I/Q网络（0.14 mm（2）），用于生成毫米波（mm-Wave）的高精度LO I/Q信号，并提供内置负载阻抗上变换以实现无源电压放大，从而提高LO摆幅以获得更高的RX转换增益（CG）。高质量差分I/Q产生的测量相位/幅度变化小于+/- 1.8度/+/- 0.15 dB，瞬时带宽为25-50 GHz，无需任何校准或开关/可调元件。RX采用峰值35.2 dB CG和18 dB增益调谐进行测量，以适应复杂的EM环境。RX调制测试成功地证明了接收18 Gb/s 64-QAM和14.4 Gb/s 256-QAM信号。此外，在同时注入所需信号和镜像的情况下测试RX，而镜像使用与所需信号相同的宽带调制方案和数据速率。RX成功地拒绝宽带镜像，并接收具有-27.6-dB EVM的12-Gb/s 64-QAM和具有-33.47-dB EVM的8-Gb/s 256-QAM的期望信号。据我们所知，本文介绍了第一款CMOS RX前端，该前端覆盖24.5-43.5 GHz毫米波5G频段，支持瞬时全频段IR，无需校准、开关/调谐元件或外部控制，从而实现未来的宽带低延迟5G MIMO。
This article presents an extremely broadband 24.5-43.5 GHz receiver (RX) achieving 32-56-dB instantaneous full-band image rejection (IR), which supports multiple major mm-Wave 5G bands at 24.5/28/37/39/43 GHz. A compact transformer-based I/Q network (0.14 mm(2)) is proposed to generate high-precision LO I/Q signals at millimeter-wave (mm-Wave) and provide built-in load impedance up-transformation for passive voltage amplification, boosting the LO swing for a higher RX conversion gain (CG). The high-quality differential I/Q generation is measured with phase/amplitude variation less than +/- 1.8 degrees/+/- 0.15 dB over an instantaneous wide bandwidth of 25-50 GHz without any calibration or switching/tunable elements. The RX is measured with a peak 35.2-dB CG and 18-dB gain tuning to accommodate complex EM environments. The RX modulation tests successfully demonstrate receiving 18-Gb/s 64-QAM and 14.4-Gb/s 256-QAM signals. In addition, the RX is tested with concurrent injection of a desired signal and an image, while the image uses the same wideband modulation scheme and data rate as the desired signal. The RX successfully rejects the wideband images and receives the desired signals of 12-Gb/s 64-QAM with -27.6-dB EVM and 8-Gb/s 256-QAM with -33.47-dB EVM. To the best of our knowledge, this article presents the first CMOS RX front end that covers 24.5-43.5-GHz mm-Wave 5G bands and supports instantaneous full-band IR with no calibration, switching/tuning elements, or external controls, enabling future wideband low-latency 5G MIMOs.