基于速率增强JTIDS波形的干扰检测与擦除方法

Jamming detection and erasing method based on the rate-enhanced JTIDS waveform

联合战术信息分发系统(JTIDS)是一种应用广泛的态势感知数据链。为解决速率增强JTIDS波形在部分频带阻塞干扰下性能恶化的问题,该文提出了一种低复杂度的干扰检测与擦除策略。首先对每个脉冲的信噪比(SNR)进行估计,并对脉冲进行粗分类。接着,估计出整个时隙内普通脉冲的平均SNR。最后,对脉冲进行精细分类,并依据一定的策略给每个脉冲赋予一个擦除因子。仿真表明:该方法能极大减小部分频带阻塞干扰对解调性能的影响,显著降低误码率。该方法复杂度低,易于实现。

Joint tactical information distribution system（JTIDS）is a kind of widely used situational awareness data-link.To solve the performance deterioration problem of the rate-enhanced JTIDS in the presence of partial-band barrage jamming,a low complexity method for interference detection and erasure is proposed.First of all,the signal-to-noise ratio（SNR）of each pulse is estimated and the pulse is classified roughly.Then,the average SNR of all the normal pulses in the time slot is estimated.Finally,a fine pulse classification is performed,and each pulse is given an erasure-factor in a certain strategy.Simulation shows that this method greatly eases the effects of the partial-band barrage jamming on the reception performance and significantly reduces the bit error rate.The method is low complexity and easy to implement.