高集成度的高频多普勒探测系统的设计

发布时间：2018-04-11 10:38

  本文选题：电离层扰动 + 多普勒频率偏移　； 参考：《电波科学学报》2017年03期

【摘要】：地震、台风、磁暴等天气事件爆发时,引发的电离层扰动会对无线电波的传播环境造成影响,使空间传播的高频无线电信号产生多普勒频率偏移.针对此问题,提出了一种新型的高集成度的高频多普勒探测系统.通过研发的高集成度的高频多普勒接收机接收来源于电离层反射的高频无线电信号,经过信号处理电路的混频处理获得低中频信号,再通过数据采集卡采集信号并保存在PC机上,利用上位机软件对保存的数据进行实时处理,得到高频多普勒频移的变化曲线,从而研究电离层扰动特征.同时给出了电离层日出效应、偶发E层和行进式电离层扰动等探测实例.实际观测表明:该探测系统运行稳定可靠,可以用于电离层环境的长期监测.
[Abstract]:When earthquakes, typhoons, magnetic storms and other weather events erupt, the ionospheric disturbances will affect the propagation environment of radio waves and cause the Doppler frequency offset of the high frequency radio signals propagated in space.In order to solve this problem, a new high-frequency Doppler detection system with high integration is proposed.A highly integrated high-frequency Doppler receiver was developed to receive high-frequency radio signals from ionospheric reflection, and the low-intermediate frequency signals were obtained by mixing the signal processing circuits.Then the data are collected by data acquisition card and stored on PC. The data stored in PC are processed in real time by the software of upper computer, and the change curve of high frequency Doppler frequency shift is obtained, thus the characteristics of ionospheric disturbance are studied.Examples of ionospheric sunrise effect, occasional E layer and traveling ionospheric disturbance are also given.Practical observations show that the system is stable and reliable and can be used for long term monitoring of ionospheric environment.
【作者单位】： 武汉大学电子信息学院;
【基金】：国家自然科学基金(41374168)
【分类号】：TN011
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本文编号：1735646