{"title":"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","authors":"Jianhang Yang;Rong Zhou;Hongjian Lan;Zhen Li;Xianlong Xiong;Bowen Wang;Zhangming Zhu","doi":"10.1109/TCSII.2025.3588918","DOIUrl":null,"url":null,"abstract":"This brief investigates the minimum signal-to-noise-ratio requirement (<inline-formula> <tex-math>${SNR} {_{\\text {MIN}}}$ </tex-math></inline-formula>) 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 <inline-formula> <tex-math>${SNR} {_{\\text {MIN}}}$ </tex-math></inline-formula>, 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 <inline-formula> <tex-math>${SNR} {_{\\text {MIN}}}$ </tex-math></inline-formula> 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.","PeriodicalId":13101,"journal":{"name":"IEEE Transactions on Circuits and Systems II: Express Briefs","volume":"72 9","pages":"1153-1157"},"PeriodicalIF":4.9000,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An 8.1 dB SNRMIN, 17.8 pJ/Conv-Step, Code-Domain Noise Suppression Baseband Scheme for Ultra-Low-Power Receiver\",\"authors\":\"Jianhang Yang;Rong Zhou;Hongjian Lan;Zhen Li;Xianlong Xiong;Bowen Wang;Zhangming Zhu\",\"doi\":\"10.1109/TCSII.2025.3588918\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This brief investigates the minimum signal-to-noise-ratio requirement (<inline-formula> <tex-math>${SNR} {_{\\\\text {MIN}}}$ </tex-math></inline-formula>) 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 <inline-formula> <tex-math>${SNR} {_{\\\\text {MIN}}}$ </tex-math></inline-formula>, 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 <inline-formula> <tex-math>${SNR} {_{\\\\text {MIN}}}$ </tex-math></inline-formula> 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.\",\"PeriodicalId\":13101,\"journal\":{\"name\":\"IEEE Transactions on Circuits and Systems II: Express Briefs\",\"volume\":\"72 9\",\"pages\":\"1153-1157\"},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2025-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Transactions on Circuits and Systems II: Express Briefs\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/11079940/\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Circuits and Systems II: Express Briefs","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/11079940/","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
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.
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.