面向应急救援的远距离磁感应透地无线通信理论与技术研究

透地无线通信系统是煤炭安全生产和灾后救援的一种安全可靠的通信系统，可在灾后救援中发挥独特的作用。透地与通信能力不足以及无法实现对井下发射机精确定位是严重制约现有透地通信系统在井下抢险救灾中发挥作用的瓶颈问题。所申请的项目提出地面或井下发射机天线采用单轴空气线圈，井下或地面接收机天线采用彼此垂直具有高磁导率磁芯的三轴线圈的远距离磁感应透地无线通信方案，以解决现有透地通信系统的瓶颈问题。项目将建立所提出磁感应透地无线通信方案透地无线通信性能分析模型与信道模型；提出方案的高效调制技术，以提高透地无线通信的可靠性与数据速率；提出方案对井下发射机的精确定位技术，以实现对井下人员的精确定位；提出接收机的更高效降噪技术，以显著提高极微弱透地信号的检测能力；研发所提出磁感应透地通信方案的原型系统，以验证所提出透地无线通信方案的性能。为突破远距离透地无线通信与井下精确定位的瓶颈问题打下理论与技术基础。

Through-The-Earth (TTE) wireless communication is a safe and reliable communication system for coal safety production and post disaster rescue, which plays a unique role in post disaster rescue. The insufficient ability of Through-The-Earth and communication as well as the inability to realize the precise positioning of the underground transmitter are the bottleneck problems that seriously restrict the existing TTE communication system to play a role in the underground rescue. The applied project proposes a scheme of remote magnetic induction (MI) TTE wireless communication that the ground or underground transmitter antenna adopts single axis air coil and the ground or underground receiver antenna adopts three axis coils with high permeability cores perpendicular to each other to solve the bottleneck problem of the existing TTE communication system. In this project, the performance analysis model and channel model of the proposed scheme will be established; the efficient modulation technique will be proposed to improve the reliability and data rate of the TTE wireless communication; the precise positioning technology of underground transmitter will be proposed to realize the precise positioning of underground personnel; a more efficient noise reduction technique will be proposed to improve the detection ability of extremely weak TTE signals; a prototype system of the proposed scheme will be developed to verify the performance of the proposed scheme. It will lay a theoretical and technical foundation for breaking through the bottleneck problems of remote TTE wireless communication and underground precise positioning.