无线电通信中的同址干扰问题研究

Research on co-site interference problem of radio communication

针对战术电台车中无线电同址干扰对车载通信系统的影响,首次进行了全面、系统的研究。首先通过实验对车载天线之间的耦合度进行了测量,并结合AnsoftHFSS软件进行了仿真验证。在耦合度统计均值的基础上,通过分析电台射频前端的阻塞模型,以及射频前端各个部分的损耗、增益、噪声,对同址干扰引起的减敏影响进行了定性分析和定量计算,并通过经验公式对同址干扰中电台频率间隔与信噪比损耗之间的关系进行了仿真。最后,提出了减敏损耗与通信距离之间的等效计算,进一步分析了同址干扰对实际通信的影响。

Investigated the co-site interference （CI） effect on vehicular communication system of tactical radio vehicle systematically and completely.Measured the coupling degrees between vehicular antennas by experiments and verified by Ansoft HFSS simulation.On the basis of the statistical value of coupling degrees,through analyzing the block mode,loss,gain and noise of the RF front end of the radio,obtained the qualitative analysis and the quantitative calculation of the desensitization effect.And simulated the relationship between frequency interval and SNR of co-site radios under CI through experienced formula.Finally,brought forward the equivalent calculation between the desensitization loss and the communicative distance,which further analyzes the CI effect on the real communication.