摘要
联合战术信息分发系统(Joint Tactical Information Distribution System,JTIDS)是美军C4ISR系统的核心组成部分。目前针对其链路性能建模多基于相干解调方式,而JTIDS采用非相干解调方式。因此,在对JTIDS多层调制技术进行分析建模基础上,研究了2种非相干解调方式JTIDS接收模型,导出了这2种接收模型下JTIDS系统在加性高斯白噪声信道下的符号错误概率表达式,通过对比分析各模型下的数值结果表明,非相干接收软判决译码模型是JTIDS性能分析的适合模型。为后续建立JTIDS仿真平台、评估JTIDS通信网络性能提供了理论依据。
The Joint Tactical Information Distribution System（JTIDS）serves as a core component of modern C4ISR in US armed force. Currently,most of the models for evaluating JTIDS performance are based on coherent demodulation method, while JTIDS adopts noncoherent demodulation method. So two reception models adopting noncoherent demodulation are investigated based on an analysis of the multi-layer modulation technique of JTIDS, the symbol error probability of JTIDS signal transmitted over AWGN channel for each model is derived respectively. By comparing the numerical results of the models,it can be concluded that noncoberent soft decision is a suitable model for JTIDS performance analysis,which provides a theoretical foundation for establishing JTIDS simulation platform and estimating JTIDS network performance.
出处
《无线电工程》
2013年第3期16-19,共4页
Radio Engineering
基金
海军工程大学科学研究基金资助项目(HGDQNJJ020)
