具有高频谱利用率和AM-PM失真校正的数字IR-UWB发射机

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2024-10-11 DOI:10.1109/TCSII.2024.3478774

Hua Chen;Yuzhong Xiao;Zhenqi Chen;Run Chen;Zhaohui Wu;Bin Li

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引用次数: 0

摘要

本文介绍了一种用于室内定位系统的符合IEEE 802.15.4z标准的脉冲无线电超宽带（IR-UWB）发射机。由数字基带控制的电流型数字功率放大器（DPA）产生可编程的脉冲波形，确保最佳的频谱利用率和旁瓣抑制。独特的是，它可以直接测量非线性电网引起的AM-PM失真，为提高线性度和提高带内频谱利用率提供了一种独特的补偿方法。作为概念验证，在22纳米FD-SOI工艺中实现了原型。测试结果表明，该设计可以支持6.5 ~ 10 GHz的通道，峰值输出功率为13 dBm。校准后，输出频谱在峰值输出功率下的带内频谱利用率为81%。芯片功耗为33.4 mW，最大输出功率谱密度为−41.3 dBm/MHz。

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A Digital IR-UWB Transmitter With High Spectrum Utilization and AM-PM Distortion Calibration

This brief presents an IEEE 802.15.4z-compliant impulse-radio ultra-wideband (IR-UWB) transmitter for an indoor positioning system. Controlled by the digital baseband, a current-mode digital power amplifier (DPA) generates programmable pulse waveforms, ensuring optimal spectrum utilization and sidelobe suppression. Uniquely, it can directly measure AM-PM distortion caused by non-linear power networks, offering an exclusive compensation method to enhance linearity and elevate in-band spectrum utilization. As a proof-of-concept, a prototype was implemented in a 22-nm FD-SOI process. The measurement result demonstrates that the design can support channels from 6.5 to 10 GHz with 13 dBm peak output power. After calibration, the output spectrum has an in-band spectrum utilization of 81% at peak output power. The chip consumes 33.4 mW at a maximum output power spectral density of −41.3 dBm/MHz.

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.