Shuping Li;Donglin Gao;Shaghayegh Vosoughitabar;Chung-Tse Michael Wu
{"title":"异步空时编码直接天线调制支持自动波束扫描多目标生命体征雷达传感","authors":"Shuping Li;Donglin Gao;Shaghayegh Vosoughitabar;Chung-Tse Michael Wu","doi":"10.1109/LMWT.2025.3566398","DOIUrl":null,"url":null,"abstract":"This work introduces a new kind of asynchronous space-time-coding (ASTC) direct antenna modulation (DAM)-enabled radar sensor designed for automatic beam-scanning in multi-target vital sign monitoring. Each element of the ASTC array receives a fixed modulation sequence with 2-bit phase ramps and a frequency offset of 8 kHz between adjacent elements, centered at a carrier frequency of 2 GHz. This configuration maintains only the +1st-order harmonic at 2.000008 GHz in the radiation of the ASTC array, facilitating the automatic counterclockwise 1-D half-space beam scanning with a scanning period of <inline-formula> <tex-math>$125~\\mu $ </tex-math></inline-formula>s. By isolating data points corresponding to each target within each scanning period and applying Fourier analysis, the vital signs of multiple targets can be precisely differentiated and extracted. The proposed radar system combines automatic scanning with fixed settings and a straightforward structure, making it especially suitable for smart home/healthcare applications.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"892-895"},"PeriodicalIF":3.4000,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Asynchronous Space-Time-Coding Direct Antenna Modulation-Enabled Automated Beam-Scanning Multi-Target Vital Sign Radar Sensing\",\"authors\":\"Shuping Li;Donglin Gao;Shaghayegh Vosoughitabar;Chung-Tse Michael Wu\",\"doi\":\"10.1109/LMWT.2025.3566398\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This work introduces a new kind of asynchronous space-time-coding (ASTC) direct antenna modulation (DAM)-enabled radar sensor designed for automatic beam-scanning in multi-target vital sign monitoring. Each element of the ASTC array receives a fixed modulation sequence with 2-bit phase ramps and a frequency offset of 8 kHz between adjacent elements, centered at a carrier frequency of 2 GHz. This configuration maintains only the +1st-order harmonic at 2.000008 GHz in the radiation of the ASTC array, facilitating the automatic counterclockwise 1-D half-space beam scanning with a scanning period of <inline-formula> <tex-math>$125~\\\\mu $ </tex-math></inline-formula>s. By isolating data points corresponding to each target within each scanning period and applying Fourier analysis, the vital signs of multiple targets can be precisely differentiated and extracted. The proposed radar system combines automatic scanning with fixed settings and a straightforward structure, making it especially suitable for smart home/healthcare applications.\",\"PeriodicalId\":73297,\"journal\":{\"name\":\"IEEE microwave and wireless technology letters\",\"volume\":\"35 6\",\"pages\":\"892-895\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2025-03-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE microwave and wireless technology letters\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/11006079/\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"0\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE microwave and wireless technology letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/11006079/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
This work introduces a new kind of asynchronous space-time-coding (ASTC) direct antenna modulation (DAM)-enabled radar sensor designed for automatic beam-scanning in multi-target vital sign monitoring. Each element of the ASTC array receives a fixed modulation sequence with 2-bit phase ramps and a frequency offset of 8 kHz between adjacent elements, centered at a carrier frequency of 2 GHz. This configuration maintains only the +1st-order harmonic at 2.000008 GHz in the radiation of the ASTC array, facilitating the automatic counterclockwise 1-D half-space beam scanning with a scanning period of $125~\mu $ s. By isolating data points corresponding to each target within each scanning period and applying Fourier analysis, the vital signs of multiple targets can be precisely differentiated and extracted. The proposed radar system combines automatic scanning with fixed settings and a straightforward structure, making it especially suitable for smart home/healthcare applications.
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