论文部分内容阅读
提出了一种对电子战接收机获得的线性调频脉冲信号进行自适应压缩的技术。它首先通过自相关的方法确定含噪序列中是否含有信号 ,以及信号出现的时间位置 ;然后从这一时间位置处截取一段含噪的信号作为线性调频压缩的相关源 ,对信号进行匹配压缩。经仿真验证 ,该技术可以从被噪声湮没的数据中有效地提取出压缩后的脉冲信号 ,如果将其用于电子战侦察接收机 ,可以将线性调频脉冲信号的灵敏度提高近 7dB～ 10dB。
A technique is proposed to adaptively compress the chirp signal obtained by the electronic warfare receiver. Firstly, it determines whether the signal contains the signal and the time position of the signal in the noisy sequence through the autocorrelation method. Then, a signal with noises is intercepted from the time position as the correlation source of the linear frequency modulation compression, and the signal is matched and compressed. The simulation results show that this technique can effectively extract the compressed pulse signal from the annihilated data and improve the sensitivity of the chirp signal by nearly 7dB ~ 10dB if it is used in the electronic warfare reconnaissance receiver.