针对宽带直升机卫星通信信道的周期性衰落特性建立了周期性删除信道模型,基于此模型研究了重发分集的策略,推导了给定信道删除周期、窗口宽度、突发长度下重发次数、重发间隔的选择方法,讨论了重发模式与参数鲁棒性、系统设计需求的关系,并结合实例讨论了系统设计的设计步骤以及其他考虑因素。分析表明,采用两次重发可在大多数直升机信道条件下实现可靠传输,且具有较好的灵活性、较低的实现复杂度。 A periodic deletion channel model is established for the cyclical fading characteristics of wideband helicopter satellite communication channel. Based on this model, the strategy of retransmission diversity is studied, and the deduplication cycle, window width, retransmission times under burst length, The method of choosing interval is discussed. The relationship between retransmission mode and parameter robustness and system design requirements is discussed. The design steps of system design and other considerations are also discussed with examples. The analysis shows that using two retransmissions can achieve reliable transmission under most helicopter channel conditions, and has better flexibility and lower implementation complexity.