移动人体对60GHz无线局域网造成阴影损耗的计算模型

A Calculation Model for Shadowing Loss Caused by a Moving Human Body in 60GHz WLAN

由于60GHz频段可未经许可用于全球范围内,因此60GHz已经成为超宽带WLAN最有吸引力的部分。然而60GHz无线局域网也有缺点,比如移动的人体和自由空间会造成显著的阴影损耗。为了开发60GHz频段附近抗干扰的技术,需要描述由移动人体引起的阴影损耗特征,并制定一个计算阴影损耗的模型。提出一种基于射线追踪方法的刀切模型,该模型适用于解决移动人体对60GHz无线局域网造成阴影损耗的计算问题中。通过对比刀切模型的实验结果和理论计算结果,该模型在人体移动方向与视距路径方向夹角为30°和60°时具有可靠性。

60 GHz has been attracting significant attentions for ultra-broadband WLAN applications because 60 GHz band is available for unlicensed use on a world-wide basis.However,60 GHz WLAN has some disadvantages,such as significant shadowing loss caused by a moving human body and large free space loss.To develop anti-shadowing techniques near the 60 GHz band,it is required to characterize features of shadowing loss caused by a moving human body and develop a calculation model for performance evaluation of countermeasures against the shadowing loss.This paper proposes a knife cutting model based on ray tracing method.which is suitable for solving the problem of shadow loss caused by a moving human body to 60 GHz WLAN.calculation model for shadowing loss caused by a moving human body in 60 GHz WLAN.Through the comparison between the calculated results and measured results,the proposed calculation model can be used for ray-tracing simulations when the angle between a LOS path and a direction of a moving human body is 30 deg and 60 deg.