北斗导航星座星间通信速率控制方法

北斗导航星座可以通过星间测距和传输链路实现自主定轨和性能增强。导航卫星间进行数据传输时，卫星相对位置时变，传输信道特性也随之不断发生变化。针对导航卫星间传输链路时变特性，提出了一种基于星历的星间通信速率控制方法。在满足传输服务质量的需求下，根据导航卫星自有的高精度星历资源定量计算星间最优通信速率，通过速率的动态调整提高星座的传输效能。仿真结果表明，采用所提方法，北斗导航星座星间传输效能可以提高1.92倍，验证了方法的有效性。 

Inter-satellite communication rate control method of Beidou navigation constellation

Beidou navigation constellation can achieve autonomous orbit determination and performance enhancement by introducing inter-satellite ranging and transmitting links. During data transmission of inter-satellite links, the relative position change of satellites with time causes the constant change of the characteristics of transmission channel. In view of the time-varying characteristics of inter-satellite transmitting links, an inter-satellite communication rate control method based on ephemeris is proposed. On the condition that the quality of transmission service is satisfied, the optimal inter-satellite transmission rate is quantitatively calculated according to the high-precision ephemeris resources that navigational satellite possesses, and the transmission efficiency is improved through the dynamic adjustment of the rate. The simulation results show that, using the proposed method, the inter-satellite transmission efficiency of Beidou navigation constellation can be improved by 1.92 times, which verifies the effectiveness of the method.