高分辨率成像冰川厚度探测雷达数字接收机设计与实现  

The Design and Implementation of Digital Receiver for High Resolution Imaging Glacier Penetrating Radar System

作　　者：赵博[1] 刘小军[1] 方广有[1] 

机构地区：[1]中国科学院电子学研究所高功率微波与电磁辐射重点实验室

出　　处：《遥感技术与应用》2008年第1期93-97,共5页Remote Sensing Technology and Application

基　　金：国家自然科学基金资助项目(60551002)

摘　　要：雷达技术是陆地和极地冰川厚度探测的重要手段。高分辨率成像冰川厚度探测雷达工作在VHF波段,接收机采用了高低增益两个通道,提高了系统的接收灵敏度。回波信号的采集采用直接中频采样技术,对获取的数字信号进行数字脉冲压缩处理,降低了接收机系统的复杂性。给出了采样频率的选取和脉冲压缩技术的实现方法,通过对实测数据的分析表明该设计是可行的。Radar is the important means for land and polar glacier depth sounding. High-resolution imaging glacier penetrating radar （HRI-GPR） works at VHF band. A dual-channel receiver is introduced for improving the performance of HRI-GPR system. In order to reduce the complexity of the receiver, an immediate I.F. sampling technology is adopted for signal acquisition and the pulse compression in digital domain is done in the receiver. The selection of sampling frequency and implementation method of pulse compression are presented in this paper. The designed receiver is successfully applied in our HRI-GPR system.

关 键 词：冰川探测雷达 带通采样 中频采样 正交检波 数字脉冲压缩 CHIRP信号 

分 类 号：TN957.5[电子电信—信号与信息处理]