基于误码率分析的通信抗干扰能力预测研究

Research on prediction of communication anti-interference ability based on bit error rate analysis

通信系统抗干扰能力预测是进行作战指挥部署的重要前提之一,其难点在于如何量化抗干扰能力的强弱并确定通信压制区域。文中利用MATLAB建立了基于BPSK调制方式的跳频与直扩通信系统仿真模型,并考虑其受宽带与部分频带干扰的情况,首先利用接收机输出端误码率求得各系统信噪比门限,其次依据超短波信号在接收机内部的处理过程进行适当的增益补偿,提出了一种对通信干扰方程进行修正的方法,即用信噪比门限等效替代压制系数,达到计算压制范围并量化预测抗干扰能力的目的。

The anti-interference ability prediction of communication system is one of the important prerequisites for combat command deployment.The difficulty is how to quantify the strength of anti-interference ability and determine the communication suppression area.In this paper,the simulation model of frequency hopping and direct spread communication system based on BPSK modulation method is established by using MATLAB.Considering the interference of broadband and partial frequency band,the signal-to-noise ratio threshold of each system is obtained by first using the symbol error rate of the receiver output.Secondly,the appropriate gain compensation is carried out according to the processing of the ultra-short wave signal in the receiver.A method for correcting the communication interference equation is proposed.The SNR is used equivalently instead of the suppression coefficient in order to calculate the suppression range and quantify the anti-interference prediction ability.