基于ARM7的电离层测高仪射频信号源的设计与实现  

Design and Implementation of RF Signal Sources for Ionosonde Based on ARM7

作　　者：朱正平[1] 陈锟[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3期70-72,89,共4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：指出了电离层测高仪中射频信号源模块的主要功能是产生用于发射的射频编码调制脉冲信号,以及用于下变频和相位解调的本振信号,利用ARM7芯片和DDS(Direct Digital Synthesizer)技术设计实现了电离层测高仪中的射频编码调制脉冲信号和本振信号.实验结果表明:该信号源所产生的高频信号具有精度高,频率转换时间短等特点,完全可以满足电离层测高仪对信号源的技术要求.The main function of the RF signal source module for the ionospheric ionosonde is to generate the encoded and modulated RF pulse signal for transmitting and the local oscillating signal for down-converting and demodulating. In this paper,we designed and achieved the encoded and modulated RF pulse signal and the local oscillating signal for ionospheric digital ionosonde by using ARM7 and DDS technology. The experimental results reveal that the realized signal sources have the merits such as high signal precision and short frequency transition time. These features can fully meet the technical demands for ionospheric digital ionosonde.

关 键 词：电离层测高仪 射频信号源 DDS技术 ARM7芯片 

分 类 号：P353[天文地球—空间物理学]