In this paper, we considered a distributed antenna system (DAS) to expand the coverage of VHF maritime communication systems and analyzed its performances. To reflect the geometrical distributed antenna port placements along the coastline, we considered a linear antenna layout. By deriving the lower bounds of the expected signal-to-noise ratio (SNR), we analyzed the SNR performances for both single-ship and multiple-ship transmission schemes. Next, based on the analytical results, we present design guidelines to implement the DAS based VHF maritime communication system. From the simulation results, the coverage expansion effect of the DAS was verified by the increased expected SNR. In addition, we confirmed that the system design parameters could be found from simple numerical calculations.

在本文中，我们考虑了分布式天线系统（DAS）来扩展VHF海上通信系统的覆盖范围并分析其性能。为了反映沿海岸线的几何分布天线端口布局，我们考虑了线性天线布局。通过推导预期信噪比（SNR）的下限，我们分析了单舰和多舰传输方案的SNR性能。接下来，基于分析结果，我们提出了设计指南，以实现基于DAS的VHF海上通信系统。从仿真结果可以看出，DAS的覆盖范围扩展效果已通过提高预期的SNR进行了验证。此外，我们确认可以从简单的数值计算中找到系统设计参数。