中文摘要：

通过对南海电磁频谱占用度进行分析,提出了空白电视频段下南海海岛无线宽带网络超远距离覆盖的解决方案,在该方案下设计了一种基于空频谱的海面信道模型.该信道模型以Irregular Terrain Methodology（ITM）模型为基础,通过模型参数修订,加入双径传播效应,使其符合南海海域无线电波传输特征.通过仿真实验,证明了该海面信道模型能够准确反映出空白电视频段无线电波海面传输损耗,为空白电视频段下南海海岛无线宽带网络超远距离覆盖方案提供理论依据.

英文摘要：

By analyzing the electromagnetic spectrum occupancy rate of the South China Sea, a solution of island wireless broadband network for over- the- horizon coverage in the South China Sea under television white space is pmpesed in this paper, and the empty spectrum based on sea surface channel model is designed. This ehmmel model is based on Irregular Terrain Methodology （1TM） model with revised parameters and dual-path propagation effect. Then it fits transmission feature of radio wave in the South China Sea. From simulations, the sea surface channel model can accurately reflect the transmission loss of radio wave in television white space. It provides a theoretical basis of island wireless broadband network for over-the-horizon coverage in television white space.