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为准确反映雾霾天气对卫星信道统计特性的影响,将雾霾天气划分为雾状态、雾霾混合状态和霾状态,分别用Rice模型、Corazza模型和Suzuki模型进行描述;根据雾霾天气状态间的转换关系,建立了雾霾天气下卫星信道三状态Markov模型;以定义的联合电平通过率、平均衰落持继时间及联合电平通过率的相对误差为性能指标进行了仿真验证。仿真结果表明,与雾霾天气下卫星信道单状态和两状态模型相比,卫星信道三状态Markov模型能更好地描述卫星信号的衰落特性,更加贴近实际。
In order to accurately reflect the influence of foggy weather on the statistical characteristics of satellite channels, the foggy weather is divided into the foggy state, the foggy-haze mixed state and the haze state, which are respectively described by the Rice model, the Corazza model and the Suzuki model. According to the haze weather conditions , The three-state Markov model of satellite channel in haze weather was established. The relative error of joint level passing rate, average fading holding time and joint level passing rate were defined as performance indicators. Simulation results show that the satellite channel three-state Markov model can better describe the fading characteristics of satellite signals than satellite channel single-state and two-state models in haze weather and is more realistic.