一种8.1 dB信噪比、17.8 pJ/反阶跃、超低功耗接收机码域噪声抑制基带方案

IF 4.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Jianhang Yang;Rong Zhou;Hongjian Lan;Zhen Li;Xianlong Xiong;Bowen Wang;Zhangming Zhu
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引用次数: 0

摘要

本文简要研究了可靠基带解码的最小信噪比要求(${SNR} {_{\text {MIN}}}$)作为码长和过采样率的函数。基于此分析,我们提出了一种利用平交ADC (LC-ADC)前端的码域噪声抑制基带处理方案。与传统的基于比较器的架构相比,该设计显著降低了${SNR} {_{\text {MIN}}}$,从而提高了接收机的灵敏度。在65nm CMOS工艺中制作了一个原型电路来验证所提出的方法。使用10位唤醒码的100 bps的测量结果表明,${SNR} {_{\text {MIN}} $仅为8.1 dB,每个转换步骤的能量效率为17.8 pJ。除了超低功率无线电之外,该技术还适用于广泛的低功率、弱信号检测系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An 8.1 dB SNRMIN, 17.8 pJ/Conv-Step, Code-Domain Noise Suppression Baseband Scheme for Ultra-Low-Power Receiver
This brief investigates the minimum signal-to-noise-ratio requirement ( ${SNR} {_{\text {MIN}}}$ ) for reliable baseband decoding as a function of code length and oversampling rate. Based on this analysis, we propose a baseband processing scheme for code-domain noise suppression that leverages a level-crossing ADC (LC-ADC) front end. Compared with conventional comparator-based architectures, the proposed design significantly reduces the ${SNR} {_{\text {MIN}}}$ , thereby improving receiver sensitivity. A prototype circuit was fabricated in a 65 nm CMOS process to validate the proposed approach. Measurement results at 100 bps with a 10-bit wake-up code demonstrate an ${SNR} {_{\text {MIN}}}$ of only 8.1 dB and an energy efficiency of 17.8 pJ per conversion step. Beyond ultra-low-power radios, this proposed technique is applicable to a broad range of low-power, weak-signal detection systems.
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来源期刊
IEEE Transactions on Circuits and Systems II: Express Briefs
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.
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