基于HARQ机制的数据链通信性能分析

利用JTIDS数据链现有的编码体制提出了一种基于HARQ机制的数据链通信模式,以提高报文传输的可靠性.首先对JTIDS系统的时隙结构进行改进,建立了HARQ机制的反馈信道,以保证该通信模式的实现;然后分析了JTIDS数据链系统在莱斯信道环境下的符号误码率,并在此基础上采用Markov模型对基于HARQ机制的数据链通信模式进行性能分析,评估了在该机制下通信的吞叶量、报文到达率、报文服务率和报文传输服务时延;最后,利用GSPN网对基于HARQ机制的数据链通信模式进行仿真分析,仿真结果表明采用HARQ机制的数据链通信系统能够很好地改善在恶劣信道环境下的报文传输能力,提高报文传输的可靠性.

The Performance Analysis of Data Link Communication in HARQ Scheme

To enhance the message transmission reliability of JTIDS communication,a HARQ scheme based on the encoding methods of JTIDS has been proposed.First,the slot structure of JTIDS has been reconstructed to build the feedback channel,which ensured that the HARQ scheme can be used in JTIDS communication.Second,the symbol error rate of JTIDS cormnunication on rician channel has been evaluated,and the performance of the scheme has been analyzed by using Markov model,the throughput,message arrival ratio,message service rate and message service delay has been derived.Finally,the effectiveness of analysis results was verified by GSPN simulation,and the result of simulation indicated that the HARQ scheme has improved message transmission reliability of JTIDS communication in hostile charmel environment.