Analysis of Communication Channel Characteristics of LUNA Lunar Base Based on Ray Tracing Method
Creating a lunar base is an important task for lunar exploration missions.To meet the high-speed data transmis-sion requirements for obtaining high-definition videos and scientific data from the lunar base,as well as the communica-tion needs of equipment such as space suits and lunar rovers,including high-capacity data rates,it is necessary to make full use of the spectrum resources in the terahertz frequency band.These are relatively abundant and can provide a larger bandwidth and faster communication rates.This study used the channel modeling method to simulate and analyze the terahertz frequency band channel characteristics in the LUNA lunar-base scenario.Evaluating the channel characteristics provided a performance evaluation of the link and other aspects,which can be utilized in the future design of the lunar-base communication system.First,a detailed study was conducted on the construction of the working and living mod-ules for the LUNA lunar base.A multiray channel model suitable for short-range communication scenarios in the lunar base was established by using a hybrid modeling method that included ray tracing and a single edge diffraction model.Fi-nally,a channel capacity model that was suitable for this scenario was derived.Second,the LUNA Hall working mod-ule and FLEXHab residence module of the LUNA lunar base were modeled,and a channel simulation was performed with the help of the terahertz channel simulator CloudRT.The characteristics of large-and small-scale fading were ana-lyzed.Finally,two different allocation methods,water injection power and equal power allocation,were used to esti-mate the channel capacity.The proposed channel model could be used to evaluate the performance of the lunar-base com-munication system in the terahertz band,and provide a theoretical basis and reference for the construction of the lunar-base communication system.
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