JTIDS数据链在多音干扰下经过莱斯衰落信道的传输性能分析

摘要

The communication link of JTIDS is analyzed according to its unclassified technical structure, symbol error probability of JTIDS adopted noncoherent demodulation in the presence of additive gaussian white noise (AWGN) and multi-tone jamming over rician fading channel is developed, numerical results are obtained by analytical results, which underlay followed discussion with respect to the impact of the jamming frequency number and jamming frequency shift to JTIDS transmission performance, and hence provides a rationale for estimating JTIDS network performance.%联合战术信息分发系统(joint tactical information distribution system,JTIDS)采用软扩频、跳频、纠错编码相结合的抗干扰体制,具备很强的抗干扰能力.通过已公开的JTIDS技术体制,分析了JTIDS通信链路的数学模型,在此基础上,研究并得出了采用相干解调方式JTIDS数据链在高斯白噪声干扰和人为多音干扰条件下,经过莱斯衰落信道的符号错误概率(symbol error probability,SEP),根据理论结果进行计算,并由所得计算结果分析了干扰频率点数分布以及干扰频率偏移对于JTIDS传输性能的影响,为评估JTIDS通信网络在干扰环境下的效能提供基础.