Title :
Five-channel VHF lightning detection method for cloud flashes
Author :
Sun, Xiubin ; Zhang, Xiaochun ; Mou, Xiangyong ; Li, Yunmin
Author_Institution :
Coll. of Electron. Eng., Chengdu Univ. of Inf. Technol., Chengdu, China
Abstract :
Based on the software radio technique, a five-channel VHF lightning detection method for cloud flashes is proposed in this paper. VHF radiation pulses emitted from the lightning channel are received by the five-element uniform circular arrays(UCA), and bandpass filtered in the frequency band from 110-118MHz. The band limited VHF signals are digitized with a sample rate of 52MHz, the Digital Down Converters(DDC) are used to shift their frequency down to baseband, and each channel has an I and a Q component. Using the combination of the phase difference between two baselines, the VHF sources can be located in digital signal processing (DSP) unit.
Keywords :
atmospheric techniques; clouds; geophysical signal processing; geophysics computing; lightning; Q component; VHF radiation pulses; VHF sources; band limited VHF signals; cloud flashes; digital down converters; digital signal processing unit; five-channel VHF lightning detection method; five-element uniform circular arrays; frequency band; lightning channel; software radio technique; Azimuth; Clouds; Digital signal processing; Educational institutions; Lightning; Optical interferometry; Receiving antennas; Cloud Flashes; Lightning Detection Method; Software Radio; UCA; VHF;
Conference_Titel :
Lightning (APL), 2011 7th Asia-Pacific International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4577-1467-2
DOI :
10.1109/APL.2011.6111037
