智能环境网络中的穿戴式传感天线与体域传播特性研究

In the realization of the future smart environment networks, one of the key and widely-concerned problems is to establish effective, robust communications between the body area networks (BANs) and the access point. However, suffering from the limited, short range coverage of body-worn antennas and the high propagation loss at frequency bands above 6GHz, it is a challenge task to study the propagation characteristics between the BANs and the access point. Therefore, it is essentially important to develop novel high performance, body-worn sensor antennas and then to investigate the new, universal propagation models and channel models as well. Based on the research results of the latest National Science Foundation of China (NSFC) proposal on compact sensing antennas of the applicant and motivated by the evolution of future wireless communication systems and the applications of intelligent healthcare networks as well, innovative technologies on body-worn sensor antennas and body-area wireless propagation characteristics will be investigated in this proposal. At first, an equivalent source coupling model is proposed to establish the synthesis design method of planar, wideband complementary dipoles composite antennas and used to develop novel body-worn sensor antennas. In the next step, the proposed novel antennas are used to carry out body-area, wireless propagation measurements under various, different indoor environments. Based on intensively plenty measurements, novel universal propagation models and channel models for all possible scenarios in intelligent healthcare networks can be obtained by using statistical method. Finally, the proposed propagation models and channel models are employed to develop a general wireless channel simulator for intelligent healthcare network and smart environment network applications. In this proposal, new antenna design principles and novel indoor propagation environment mechanism in the intelligent healthcare networks will be presented, investigated and validated. In addition, these principles and mechanisms will be used to slove the robust communication problem between the BANs and the access point in the future smart environment networks. The methods, techniques and tools based on the new methodology can be used to cover all aspects in the future development of the smart environment network and the intelligent healthcare network as well, i.e., the spectrum management/regulation, the link budget, the modulation/demodulation as well channel coding/decoding schemes, the transmission protocols and etc..

智能环境网络能主动感知和识别人体信息，并自适应地提供智慧服务,体域网与接入点的可靠连接则是实现这种功能的关键。由于未来无线通信系统将向6GHz以上频段演进，现有穿戴式天线作用距离短，高频体域传播损耗大、特性复杂且缺少通用模型，无线信号的有效传输将面临极大困难。因此必须设计高性能穿戴式传感天线、并用其探索研究体域传播特性来解决上述问题。本项目依托申请人完成的前一个国家自然科学基金项目的研究基础，以智慧健康网络为应用背景，首先融合平面电-磁振子组合天线宽带小巧、辐射稳定等优点，建立等效源多模耦合模型并形成其设计方法，研制新型穿戴式传感天线，然后用其测量并构建新型体域路径损耗、时延扩展和相干带宽模型。本项目旨在揭示穿戴式传感天线的设计规律，形成6GHz以上频段通用的体域衰落信道仿真器，解决体域网与接入点之间的可靠传输问题，从而为智能环境网络的无线覆盖、干扰控制、信号与协议设计等后续工作奠定基础。

本项目依托申请人完成的前一个国家自然科学基金项目的研究基础，以智慧健康网络为应用背景，首先融合平面电-磁振子组合天线宽带小巧、辐射稳定等优点，建立等效源多模耦合模型并形成其设计方法，研制新型可穿戴天线，然后用其测量并构建新型体域路径损耗、时延扩展和相干带宽模型。本项目初步揭示了基于本征模多谐思想的可穿戴天线的设计规律，首次实现了平面端射圆极化天线的概念设计，提出了病房环境中离体衰落信道的新型测量及建模方法，成功研制了6-8.5GHz频段通用的体域衰落信道仿真器，解决了体域网与接入点之间的可靠传输问题，形成了智慧健康网络中可穿戴天线设计及单点体域衰落信道建模的通用研究方法，为智能环境网络的无线覆盖、频段规划与管理、干扰控制、信号与协议设计等后续工作奠定理论与实践基础。