基于相位编码脉冲压缩体制的电离层探测系统  

Ionospheric sounding system based on phase modulated pluse compression

作　　者：杨国斌[1] 赵正予[1] 陈绪元[2] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]南京电子技术研究所,江苏南京210013

出　　处：《华中科技大学学报（自然科学版）》2009年第3期33-35,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(40474066)

摘　　要：设计了基于相位编码脉冲压缩体制的电离层斜向返回探测系统.通过对系统特殊回波特性和探测需求的分析,讨论了整机系统信号处理的工作流程和具体设计方法,阐述了该系统基于虚拟仪器总线的高速实时信号处理实现.研究结果表明,信号处理的实现使整机系统具备处理速度快、软件化程度高等特点,在实际电离层探测中的测量数据表明,该系统可达到探测功率小、距离远等预期效果.A new ionospheric oblique baekseattering sounding system is introduced based on the pseudo-random noise phase modulated pulse compression. Considering the analysis of the system and function, a high-speed real-time signal processing system based on the virtual instrument bus is expounded, which ensures the system of electromagnetic compatibility and high-speed data transmission characteristics. According to the analysis of echo characteristics and detection demands, the workflow and design method of the system＇s signal processing software is discussed. The novel method of the system design and algorithm against to the new interval pulse code modulation are introduced to enhance the system performances. With advanced virtual instrument bus and real-time signal processing technology, the implement of the signal processor makes the system be equipped to handle fast and has a high degree of software features. When the system is used in ionospheric sounding affairs, the sound- ing results indicate that it has the advantage of low detecting power and far detecting distance while comparing with the other similar devices.

关 键 词：脉冲编码调制 信号处理 电离层探测 虚拟仪器总线 软件设计 

分 类 号：TN95[电子电信—信号与信息处理]