【摘要】 在建立甚高频空地数据链信道访问状态模型的基础上，利用连续时间的马尔可夫链模型和ＣＳＭＡ矩阵分析方法，分析了空地数据包试图发送率、信道传输检测时间对数据链性能的影响，对不同用户访问规律、不同的数据包发送用户数下的信道吞吐量和报文数据延时等性能指标进行数值模拟，结果表明，用户数目、重传率及信道检测时间对数据链性能有显著影响。更多还原

【Abstract】 A model of channel access state transition for VHF air/ground datalink, which uses the continuous time Markov chain and the CSMA matrix analyze method, is proposed in this paper. The throughput and data package delay of datalink under various user access laws and user numbers of sending data are calculated to analyze the effects of air/ground report channel loading and channel transmission detection time on the performance of VHF datalink. The results show that the user numbers, retransmission ratio and transmission detection time have significant effects on the performance of VHF datalink.更多还原