Wideband digital low-frequency radio receiver

Wideband digital low-frequency radio receiver
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宽带数字低频无线电接收机

DOI:
10.1088/0957-0233/21/1/015901
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发表时间:
2010
影响因子:
2.4
通讯作者:
Füllekrug M
Füllekrug M
中科院分区:
工程技术3区
文献类型:
--
作者:
Füllekrug M

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本文介绍了一种用于科学研究的宽带数字低频无线电接收机。该便携式电池供电仪器能够记录频率范围为1.4 Hz至1.400 kHz的电场强度,采样频率为1 MHz,幅度分辨率为1.35 µV,定时精度为1.12 ns,同时连续进行数天的数字波形记录。该仪器严格遵循模块化设计,因此当相应的数字技术可用时,它可以扩展到更高的频率和定时精度。低成本的无线电接收器可以通过同步各个无线电接收器来绘制低频无线电天空而发展成干涉测量网络。第一次测量大气电场是在英格兰西南部的埃克斯穆尔国家公园进行的,以说明这种新型仪器的能力。
A wideband digital low-frequency radio receiver for scientific applications is described. The portable battery-powered instrument has the capability to record electric field strengths in the frequency range from∼ 4 Hz to∼ 400 kHz with a sampling frequency of 1 MHz, an amplitude resolution of∼ 35 µV and a timing accuracy of∼ 12 ns whilst performing continuous digital waveform recordings for several days. The instrument strictly follows a modular design such that it can be extended to higher frequencies and timing accuracy when the corresponding digital technology becomes available. The low-cost radio receiver can be developed into an interferometric network by synchronizing individual radio receivers to map the low-frequency radio sky. The first measurements of atmospheric electric fields are carried out at Exmoor National Park in Southwest England to illustrate the capabilities of the novel instrument.
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