基于相位特征的二次雷达解交织技术研究

Research into Deinterleaving Technology of Secondary Radar Based on Phase Feature

二次雷达能够稳定可靠地探测飞机的位置、代码等信息,广泛运用于航路监视、飞行保障等空中交通管制领域。在飞机距离过近、阵地环境差和电磁环境复杂的情况下,二次雷达探测性能会显著降低,出现代码错误、高度跳变等问题。引起以上问题的根本原因在于同步串扰、多径效应,使应答信号交织后无法有效提取,造成探测性能急剧恶化。由于应答信息丰富,采用基于相位特性的信号处理方式,可提高二次雷达交织信号的解交织能力,降低误码率。

Secondary radar can detect the position,code and other information of aircraft stably and reliably,which is widely used in air traffic control fields such as route monitoring and flight support,etc.When the aircrafts are too close,the position environment is poor and the electromagnetic environment is complex,the detection performance of secondary radar will be significantly reduced,resulting in code errors,height jump and other problems.The root cause of the above problems lies in the synchronous crosstalk and multipath effect,which makes the response signals can not be extracted effectively after interleaving,resulting in the sharp deterioration of detection performance.Because of the rich response information,the signal processing method based on phase characteristics can improve the deinterleaving ability of secondary radar interleaved signals and reduce the bit error rate.