多通道射频收发器的相位偏移校准

IF 6.9 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE journal of microwaves Pub Date : 2023-12-06 DOI:10.1109/JMW.2023.3335349
Guoyi Xu;Edwin C. Kan
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引用次数: 0

摘要

无线电收发器中采用正交方案进行的相位测量可应用于对相位敏感的应用,如精密多静态三维定位。然而,由于频率合成器中锁相环的初始相位不可重复,使用单个本地振荡器对不同信道进行的测量会受到随机相位偏移的影响。本文提出了一种新的相位校准方法,以消除超外差接收器前端的随机和系统时变相位偏移。通过额外的硬件连接实现了直接相位偏移测量和现场校准,实现了简单的实施和精确的差分相位测量,而无需依赖带宽资源。所提出的校准方法可为每个设备重启生成标准偏差小于 2 度的可重复相位,这意味着 1.8 GHz 载波频率下的测距精度为 0.9 毫米。这种方法还可以灵活扩展,以适应更多通道、各种网络拓扑结构和更宽带宽的各种实际网络场景。
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Phase Offset Calibration in Multi-Channel Radio-Frequency Transceivers
Phase measurements by the quadrature scheme in radio transceivers can be applied to phase-sensitive applications like precision multi-static 3D localization. However, measurements at different channels with individual local oscillators suffer from random phase offsets due to non-repeatable initial phases of phase-locked loops in frequency synthesizers. In this paper, a novel phase calibration method is proposed to cancel out both the random and systematic time-invariant phase offsets at the superheterodyne receiver frontends. Direct phase offset measurements and on-site calibration are made possible by additional hardware connections, achieving simple implementation and accurate differential phase measurements without relying on bandwidth resources. The proposed calibration method generates repeatable phases for each device reboot with standard deviation less than 2 degrees, which translates to 0.9 mm ranging accuracy for 1.8 GHz carrier frequency. This method can also be flexibly extended to accommodate a broad range of practical network scenarios with more channels, various network topologies, and a wider bandwidth.
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CiteScore
10.70
自引率
0.00%
发文量
0
审稿时长
8 weeks
期刊最新文献
Front Cover Table of Contents Introduction to the Fall 2024 Issue IEEE Microwave Theory and Technology Society Information Over-the-Air Phase Noise Spectral Density Measurement for FMCW Radar Sensors
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