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为进一步提升星群协同的系统容量,考虑在卫星星群上配置阵列天线的传输模式.分析了最大化容量时下行链路的信道条件,给出了系统容量最大化的实现方式,探索了系统参数对信道容量的影响,发现信道容量随地面天线间距成周期性变化,其周期与卫星数目成反比、与地面天线阵列相对于东西方向的夹角的余弦成反比、与相邻卫星之间的角间距成反比.在多卫星多天线环境下,发现信道容量曲线的包络同样随地面天线间距成周期性变化,提出并通过仿真验证了多卫星多天线环境下减小地面天线间距和降低测控精确度要求的地面天线排布方案.
In order to further enhance the synergetic system capacity of the constellation, we consider the transmission mode of the array antenna on the satellite constellation, analyze the downlink channel condition when the capacity is maximized, give the way to maximize the system capacity, Parameters of the channel capacity and found that the channel capacity with the ground antenna spacing into a cyclical change, the cycle is inversely proportional to the number of satellites, and the ground antenna array relative to the east-west direction of the cosine is inversely proportional to the distance between adjacent satellites In the multi-satellite multi-antenna environment, it is found that the envelope of the channel capacity curve also changes periodically with the spacing of the terrestrial antennas, and the simulation proves that the antenna spacing in the multi-satellite multi-antenna environment is reduced and the monitoring and control Accuracy requirements of the ground antenna arrangement.