平流层通信若干关键技术的研究

Stratospheric platform communication (SPC) is a new type of wireless communication approach. In this project, the loss resulted from rain attenuation, propagation,shadow and multi-path in SPC system is analyzed based on the SPC characters and wireless communication theorems. With the evolution neural network, a novel rain attenuation model is proposed that can be used for SPC systems and the sattelite communication systems. At the same time, based on the landform information, a forcasting model for propagation loss in SPC system is proposed. On the other hand, the spectrum resource management approaches are analyzed and a novel dynamic channel assignment scheme is proposed for SPC system. The spectrum-share problem by a stratospheric CDMA system and a subaerial CDMA cellular woriless communication system is analyzed and the hierarchical model and non-hierarchical model for spectrum-share are proposed as a solution. Beside that, the research of channel estimation theorems for the SPC systems and new generation of communication system is taken and several new algorithms of blind channel estimation are proposed for MIMO-OFDM system that can be used for future stratospheric platform coomunication systems.

平流层通信是一种新的通信技术，本项目将根据平流层通住的具体特点，结合宽带移动通信系统的有关理论，提出最佳的动态资源管理与分配模型，最大限度地开发和利用平流层通信系统的容量。同时，对毫米波频段的电波传播损耗与信道模型预测进行深入的分析研究，提出有效的自适应动态信道编码算法，以期稳定地实现大覆盖范围的高速宽带无线传输。.