On the Relation between Mobility and Rainfall Effects in Ku/Ka-band Line-of-Sight Land Mobile Satellite Channels: An Analytical Statistical Approach

K. Liolis, A. Bolea-Alamaac, R. Prieto-Cerdeira, A. Panagopoulos, A. Martellucci
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引用次数: 7

Abstract

The candidate frequency bands for the extension of the DVB-S2/RCS broadband satellite systems to fully support mobility are the Ku (12/14 GHz) and Ka (20/30 GHz). At these frequencies, rainfall is a significant propagation impairment which has to be taken into account together with other propagation effects due to mobility, such as multipath, shadowing and blockage. Experimental measurement campaigns conducted so far for Ku/Ka-band land mobile satellite (LMS) channels have mainly focused on the characterization of the mobility effects and have not considered any possible relation between the mobility and rainfall effects. However, recent limited work has indicated that these two fading sources are not independent. The present analysis represents a first approximation addressing this open problem. Emphasis is put on the line-of-sight (LOS) state of a Ku/Ka-band LMS channel, which can be modeled by the Ricean distribution and a high K-factor. A novel analytical model relating the Ricean K-factor with the rain fading effects is presented based on which, an analytical prediction model for the distribution of the Ricean K-factor is derived. The proposed analysis is flexible, can be applied on a global scale and incorporate the impact of several important operational, climatic and geometrical parameters of a mobile satellite system on its channel multipath behavior. Useful numerical results are provided, the need for further experimental verification data is pointed out and specific future planned work is also mentioned.
Ku/ ka波段陆地移动卫星视距通道机动性与降雨效应的关系:一种分析统计方法
扩展DVB-S2/RCS宽带卫星系统以完全支持移动性的候选频段是Ku (12/14 GHz)和Ka (20/30 GHz)。在这些频率下,降雨是一个重要的传播障碍,必须考虑到其他传播影响,如多径、阴影和阻塞。迄今为止对Ku/ ka波段陆地移动卫星(LMS)信道进行的实验测量活动主要集中在流动性效应的表征上,而没有考虑到流动性与降雨效应之间的任何可能关系。然而,最近有限的工作表明,这两个衰落源不是独立的。目前的分析是解决这个开放问题的第一个近似。重点讨论了Ku/ ka波段LMS信道的视距状态,这种视距状态可以用rice分布和高k因子来模拟。在此基础上,推导出了降雨衰减效应与Ricean k因子分布的解析预测模型。所提出的分析是灵活的,可以在全球范围内应用,并将移动卫星系统的几个重要的业务、气候和几何参数对其信道多径行为的影响纳入其中。给出了有用的数值结果,指出了进一步实验验证数据的必要性,并提出了今后具体的计划工作。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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