面向可穿戴式医疗设备的新型无线收发机芯片技术研究

Wireless wearable medical device has promising prospects in many aspects such as disease detection, Physiological data monitoring, quick test, home medical care and remote assistant medical service. Wireless wearable medical device can be used in long term monitoring chronic disease patients such Coronary heart disease, hypertension, diabetes , which reduce their medical fee and relax the issue of the shortage of medical resources in domestics. Long time used wearable medical device has stringent requirement on power consumption, reliable data transmission and the use of comfort and convenience. Low power wireless transceiver is the one of key techniques in the Wireless wearable medical device. In the project, a novel wireless transceiver utilizing human body as antenna has been firstly proposed to meet the requirement of long time used wearable medical device. Compared with conventional wireless transceiver, proposed wireless transceiver has advantages of lower power consumption, more reliable data transmission and reducing form factor of wearable medical device. In the design of proposed wireless transceiver, innovative circuits techniques have been proposed, which can adapt to the human body antenna. Through the projects, it has laid a good foundation for developing high quality wireless medical device.

无线可穿戴式医疗传感设备在疾病检测、生理数据监控、快速化验、家庭医疗、远程协助医疗等领域具有广泛的应用前景。无线可穿戴式医疗设备可以对冠心病、高血压、糖尿病等慢性疾病患者进行长期监测，降低医疗费用，缓解国内医疗资源短缺问题。长时间使用的可穿戴式医疗设备对功耗、数据传输的可靠性和使用的舒适/方便程度有着苛刻的要求。低功耗无线收发机技术无线医疗传感器系统的核心和关键技术之一。项目针对长时间使用的可穿戴式医疗设备的问题，首次提出了新型的基于人体天线无线收发机技术。相对于传统的无线收发机，该技术具有功耗低、数据传输可靠和医疗设备尺寸小等优点。在基于人体天线的无线收发机芯片技术中，针对人体天线的特点，提出了与之相适应的创新电路技术。通过掌握基于人体天线的无线收发机芯片技术，为研制高品质的无线可穿戴式医疗设备奠定了良好的基础。

无线可穿戴式医疗传感设备在疾病检测、生理数据监控、快速化验、家庭医疗、远程协助医疗等领域具有广泛的应用前景。低功耗无线收发机技术是无线可穿戴式医疗传感设备中的核心技术，其对低功耗、高集成度有着非常高的需求。本项目首次提出了基于人体天线的无线收发机架构。这种收发机采用人体作为天线，其功耗、尺寸均小于传统的收发机。本项目围绕基于人体天线的无线收发机，展开了一系列研究工作，取得了如下成果。（1）针对项目提出的人体天线，为其建立了人体天线模型，对人体天线进行了三维建模和电磁仿真。详细研究了人体天线的性能以及其信道衰减模型，为无线收发机芯片设计提供基础。（2）研究了与项目相关的若干收发机技术，包括：基于“chopper RF”的新型抗干扰射频接收前端技术，超低功耗接收前端技术，全数字锁相环技术等，并通过实际的流片验证了这些技术。（3）提出了一种基于人体天线的背反射收发机架构，并基于此架构完成了一款超低功耗的收发机并流片测试。当该收发机芯片在1Mb/s数据率下，功耗约450μW。其性能达到了项目预期目标。项目组在本项目支持下，发表了国际重要的会议和期刊10余篇，包括ASSCC、MWCL、ISCAS等，另外还申请了国家专利3项。