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采用多天线技术的60 GHz无线通信被认为是未来室内场景下高数据率宽带无线接入一种有前途的解决方案。参考802.11ad工作小组采用的60 GHz信道模型,根据60 GHz路径损耗公式提出的分布式天线系统间距的优化方案可以保证房间内功率覆盖的均匀性。在此基础上,进一步分析60 GHz多天线系统在不同链路条件下的信道条件数关系,提出一种基于信道条件数的天线选择策略。该策略利用信道条件数判断信道性能,既保证了通信质量,又适时降低系统总功率,切换简单、易于操作,适用于60 GHz室内无线通信。
60 GHz wireless communication using multiple antenna technologies is considered a promising solution for high data rate broadband wireless access in future indoor scenarios. With reference to the 60 GHz channel model adopted by the 802.11ad working group, the optimization of the distributed antenna system spacing proposed by the 60 GHz path loss formula can ensure the uniformity of power coverage in the room. Based on this, we further analyze the relationship between channel conditions under different link conditions for 60 GHz multi-antenna system and propose an antenna selection strategy based on the number of channel conditions. This method uses channel condition number to judge the channel performance, which not only guarantees the communication quality but also reduces the total system power at the proper time. The switching is simple and easy to operate. It is suitable for 60 GHz indoor wireless communication.