【摘要】 针对现有卫星通信网传输效率不高的问题,讨论了自适应编码调制(ACM)技术在卫星通信中的应用。提出了在点对点和TDM/TDMA(FDMA)组网方式下的编码调制的自适应调整策略和自适应调整门限值的计算方法,给出了中心站网管控制下的自适应调整流程;并通过重新设计2种应用方式下的调制信号帧结构,结合现有的突发解调技术,可以实现信号的自适应解调。更多还原

【Abstract】 Aimed at the low transmission efficiency in current satellite communication network,the application of adaptive modulation and coding technology in satellite communication is discussed in this paper.The adaptive scheme and algorithms of adjusting the threshold are introduced,both applied in end-to-end conditions and TDM/TDMA(FDMA)networks.Moreover,the adaptive process under the control of net management center is provided here.Combined the new modulation frame scheme in both modes with the existing burst demodulation technology,the adaptive demodulation of signal can be realized.更多还原