论文部分内容阅读
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 widely used situational awareness data link. In order to solve the problem of rate-deteriorating the performance of JTIDS waveform under partial-band blocking interference, a low-complexity interference detection and erasing strategy is proposed. The signal-to-noise ratio (SNR) of each pulse is first estimated and the pulse is coarsely classified. Next, the average SNR of normal pulses over the entire time slot is estimated. Finally, the pulse is finely classified and given to each pulse according to a certain strategy to give an erase factor. The simulation results show that the proposed method can greatly reduce the impact of partial band jamming on demodulation performance and significantly reduce the bit error rate. The method is low complexity and easy to implement.