A Vehicle-to-Vehicle Channel Model for Tactical Communication Environments
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摘要: 在战术通信环境下，机动车载平台间的无线信道特性更加复杂。传统移动信道模型没有考虑战术场景下的特殊因素对车对车信道的影响，所以此类模型不能应用于战术车载通信系统的设计和优化。为解决传统移动信道模型的局限性，该文提出一种适用于战术通信环境的车对车(Tactical-Vehicle-to-Vehicle, T-V2V)信道模型。该模型充分考虑了实际战术场景中两个车载平台间相互运动、方向性天线的对准问题以及地形地貌等因素对车对车信道的影响，并基于电平通过率(Lever Crossing Rate, LCR)和平均衰落持续时间(Average Duration of Fading, ADF)指标对所提模型进行统计分析。仿真结果表明，所提模型更加贴合战术通信实际情况，能够更为准确地反映出战术通信环境下的车对车信道的变化特性。最后，该文对影响T-V2V信道模型的相关因素进行了仿真分析，所得结果对战术车载通信系统的物理层设计具有重要参考价值。Abstract: In the tactical communication environments, the characteristics of the wireless channel between mobile vehicle platforms become more complicated. The impact of the special tactical factors is not taken into account in the traditional mobile channel models. Therefore, these models are difficult to be applied directly to the design and optimization of vehicular systems in the tactical scenarios. In order to address the limitation of traditional mobile channel models, a Tactical Vehicle-to-Vehicle (T-V2V) channel model is proposed for the tactical communication environments, which considers jointly the influences of the mutual movement between two vehicle platforms, the alignment problem of directional antennas and the tactical terrain. Then, the proposed model is statistically analyzed based on the index of the Lever Crossing Rate (LCR) and the Average Duration of Fading (ADF). The simulation results show that the proposed model is more suitable for the actual situation and reflects the changing characteristics of V2V channel more accurately in the tactical environments. Finally, the relevant factors of the proposed model are analyzed and the conclusions can provide important guiding significance for the physical layer design in tactical communication environments.
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