伪随机编码调相在铁路8mm驼峰测速雷达的应用研究  

Research on Application of Pseudo-random Code Phase Modulation in 8 mm Hump Velocity Radar

作　　者：黄欣萍[1] 刘功民[1] 

机构地区：[1]柳州铁道职业技术学院信息工程系,广西柳州545007

出　　处：《铁道学报》2014年第6期68-74,共7页Journal of the China Railway Society

摘　　要：根据铁路8mm驼峰测速雷达的技术条件要求以及在实际应用中存在的各种干扰会使雷达输出多普勒频率不稳定的问题,提出将m码码型变换的互相关技术应用于8mm驼峰测速雷达,重点对m码码型变换的互相关函数以及应用于驼峰测速雷达的信号处理进行分析,对此种体制的雷达框图、原理、信号处理数学分析以及应用中重要的m序列码的参数选择等技术问题进行研究。通过仿真实验,说明此种体制雷达对测速区以外的远、近距离上的回波干扰和其他杂波干扰具有较大的抑制作用,并可有效地抑制发射机泄露信号产生的噪声干扰。According to the technical requirements of the 8 mm hump velocity radar and in view of solving the problem existing in application of the 8 mm hump speed radar that various kinds of interference produce instable Doppler radar output frequencies , the m code pattern transform cross-correlation technique was introduced to be utilized in the 8 mm hump speed radar . Analysis was mainly focused on the cross-correlation function and hump radar signal processing . The block diagram ,principle numerical signal processing of the hump radar and selection of the m sequence code parameters in application were studied . Simulation shows as follows ：Echo interference and other clutter are significantly decreased outside the velocity measurement area over both far and near distances ;noises generated by the transmitter leakage signal are suppressed effectively .

关 键 词：驼峰测速雷达 伪随机编码 自相关及互相关函数 多普勒信号 

分 类 号：U284.66[交通运输工程—交通信息工程及控制] TN95[交通运输工程—道路与铁道工程]