电离层数字测高仪中的脉冲压缩技术及其FPGA实现  

Implementation of Pulse Compression Technology in Digital Ionosondes

作　　者：朱正平[1] 周健勇[2] 陈琨[2] 张泽奎[2] 

机构地区：[1]中南民族大学电子信息工程学院,武汉430074 [2]中南民族大学等离子体物理研究所,武汉430074

出　　处：《中南民族大学学报（自然科学版）》2009年第2期65-69,共5页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(40774089);湖北省自然科学基金资助项目(2008CDB045)

摘　　要：使用现代雷达信号处理系统中广泛应用的数字脉冲压缩技术,在FPGA硬件平台上设计实现了电离层数字测高仪接收机模块中用于对13位巴克码进行解码的相关运算电路,解决了电离层数字测高仪中目标作用距离与距离分辨率之间的矛盾.实验结果表明:基于FPGA的相关运算电路处理速度快,精度高,实时性好,完全满足电离层数字测高仪对解码电路的性能指标和技术要求.By using pulse compression technology, which is widely used in signal processing of modern radar system, a correlation arithmetic circuit is designed for decoding 13-bit Barker code in receiver part of ionospheric digital ionosondes based on FPGA platform,which resolves the contradiction between the object＇s action range and range resolution in digital ionosondes. The experimental results show that the correlation arithmetic circuit based on FPGA has features of high processing speed, high precision and better real-time characteristics. This fully meets the demand of performance and technique specifications for digital ionosondes.

关 键 词：电离层数字测高仪 脉冲压缩 相关运算 FPGA平台 

分 类 号：P353[天文地球—空间物理学]