增强型罗兰信号周期检测方法

Detection Method of Enhanced Loran Signal Cycle

增强型罗兰接收机的脉冲信号周期检测准确性直接影响其导航定位与定时精度。针对现有周期检测方法的不足,以线性数字平均提高信噪比为基础,采用峰峰比检测法和极性判决法实现对脉冲信号的联合检测,通过仿真验证了该方法的有效性和抗噪性能,为现代化数字增强型罗兰接收机的高精度导航定位与定时奠定了基础。

The accuracy of pulse signal cycle detection of enhanced Loran receiver will directly affect its navigation,positioning and timing accuracy.Aiming at the shortcomings of cycle detection method,based on the linear digital average to improve the signal-to-noise ratio,the peak-to-peak ratio detection method and the polarity determination method are used to realize the joint detection of the pulse signal.The validity and anti-noise performance of the method are verified by simulation,which lays the foundation for high-precision navigation positioning and timing of modern digital enhanced Loran receiver.