移动人体对60GHz无线局域网造成阴影损耗的计算模型
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摘要
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.
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.
引文
[1]张琼.60GHz毫米波短距通信的若干问题研究[D].中国科学技术大学,2010.
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[10]M.Jacob,S.Priebe,A.Maltsev,A.Lomayev,V.Erceg and T.Kürner.A ray tracing based stochastic human blockage model for the IEEE 802.11ad 60 GHz channel model[C].Proceedings of the 5th European Conference on Antennas and Propagation(EUCAP),Rome,2011,pp.3084-3088.
[11]严忠民,徐云生.用射线跟踪法预测室内电波传播模型[J].信息通信,2017(2):8-9.
[12]葛云鹏.超短波(FM)通讯与阴影损耗[J].森林防火,1991(2):28-29.
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[2]王静,杨旭,莫亭亭.60GHz无线通信研究现状和发展趋势[J].信息技术,2008(3):140-144.
[3]A.Siligaris et al.A 65nm CMOS fully integrated transceiver module for 60GHz wireless HD applications[C].2011 IEEE International Solid-State Circuits Conference,San Francisco,CA,2011,pp.162-164.
[4]T.Aoyagi.Consideration of antenna directions for high frequency wireless body area networks during human walking movement[C].2017 11th European Conference on Antennas and Propagation(EUCAP),Paris,2017,pp.283-285.
[5]H.Singh,J.Hsu,L.Verma,S.S.Lee and C.Ngo.Green operation of multi-band wireless LAN in 60 GHz and 2.4/5 GHz[C].2011 IEEE Consumer Communications and Networking Conference(CCNC),Las Vegas,NV,2011,pp.787-792.
[6]M.Umehira,G.Saito,S.Wada,S.Takeda,T.Miyajima and K.Kagoshima.Feasibility of RSSI based access network detection for multi-band WLAN using 2.4/5GHz and 60GHz[C].2014 International Symposium on Wireless Personal Multimedia Communications(WPMC),Sydney,NSW,2014,pp.243-248.
[7]T.V.Nguyen,E.Masry and L.B.Milstein.Channel Model and Performance Analysis of QAM Multiple Antenna Systems at 60-GHz in the Presence of Human Activity[C].2011 IEEE Global Telecommunications Conference-GLOBECOM 2011,Houston,TX,USA,2011,pp.1-6.
[8]M.Jacob,C.Mbianke and T.Kürner.A dynamic 60 GHz radio channel model for system level simulations with MAC protocols for IEEE 802.11ad[C].IEEE International Symposium on Consumer Electronics(ISCE 2010),Braunschweig,2010,pp.1-5.
[9]A.Maltsev,R.Maslennikov,A.Sevastyanov,A.Lomayev and A.Khoryaev.Statistical channel model for 60 GHz WLAN systems in conference room environment[C].Proceedings of the Fourth European Conference on Antennas and Propagation,Barcelona,Spain,2010,pp.1-5.
[10]M.Jacob,S.Priebe,A.Maltsev,A.Lomayev,V.Erceg and T.Kürner.A ray tracing based stochastic human blockage model for the IEEE 802.11ad 60 GHz channel model[C].Proceedings of the 5th European Conference on Antennas and Propagation(EUCAP),Rome,2011,pp.3084-3088.
[11]严忠民,徐云生.用射线跟踪法预测室内电波传播模型[J].信息通信,2017(2):8-9.
[12]葛云鹏.超短波(FM)通讯与阴影损耗[J].森林防火,1991(2):28-29.
[13]郭建美.60GHz单载波通信系统中低复杂度频域均衡技术研究与实现[D].电子科技大学,2015.