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通过通用软件无线电外设（USRP）的投影列实现用于监测地球电离层的电子电离探空仪。

Implementation of an Electronic Ionosonde to Monitor the Earth's Ionosphere via a Projected Column through USRP.

作者信息

Barona Mendoza Jhon Jairo, Quiroga Ruiz Carlos Fernando, Pinedo Jaramillo Carlos Rafael

机构信息

Geopositioning Laboratory, Universidad Del Valle, ETSI Universidad Politécnica de Madrid, Cali 760036, Colombia.

Geo Positioning Laboratory, Universidad Del Valle, Cali 760036, Colombia.

出版信息

Sensors (Basel). 2017 Apr 25;17(5):946. doi: 10.3390/s17050946.

DOI:10.3390/s17050946
PMID:28441329
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5461070/
Abstract

This document illustrates the processes carried out for the construction of an ionospheric sensor or ionosonde, from a universal software radio peripheral (USRP), and its programming using GNU-Radio and MATLAB. The development involved the in-depth study of the characteristics of the ionosphere, to apply the corresponding mathematical models used in the radar-like pulse compression technique and matched filters, among others. The sensor operates by firing electromagnetic waves in a frequency sweep, which are reflected against the ionosphere and are received on its return by the receiver of the instrument, which calculates the reflection height through the signal offset. From this information and a series of calculations, the electron density of the terrestrial ionosphere could be obtained. Improving the SNR of received echoes reduces the transmission power to a maximum of 400 W. The resolution associated with the bandwidth of the signal used is approximately 5 km, but this can be improved, taking advantage of the fact that the daughterboards used in the USRP allow a higher sampling frequency than the one used in the design of this experiment.

摘要

本文阐述了利用通用软件无线电外设（USRP）构建电离层传感器或电离层探测仪所进行的过程，以及使用GNU-Radio和MATLAB对其进行编程。该开发涉及对电离层特性的深入研究，以应用诸如雷达式脉冲压缩技术和匹配滤波器等相应的数学模型。该传感器通过发射频率扫描的电磁波来工作，这些电磁波在电离层反射后被仪器的接收器接收，接收器通过信号偏移来计算反射高度。根据这些信息和一系列计算，可以获得地球电离层的电子密度。将接收到的回波的信噪比提高可将发射功率降低至最大400W。与所用信号带宽相关的分辨率约为5km，但利用USRP中使用的子板允许比本实验设计中使用的采样频率更高这一事实，该分辨率可以得到提高。

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