关键词: 时变信道/
磁化等离子体/
调制体制/
可靠通信
English Abstract
Experimental study of the communication performance of electromagnetic wave in time-varying and magnetized plasma channel
Bo Yong1,Zhao Qing1,
Luo Xian-Gang2,
Fan Jia1,
Liu Ying1,
Liu Jian-Wei1
1.School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
2.State Key Laboratory of Optical Technologies for Microfabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
Fund Project:Project supported by the National High Technology Research and Development Program of China (Grant No. 2011AA7022016), the National Natural Science Foundation of China (Grant No. 11275045), and the Scientific Research Foundation of the Education Department of Sichuan Province, China (Grant No. 2013GZ01333).Received Date:20 November 2015
Accepted Date:11 December 2015
Published Online:05 March 2016
Abstract:In this paper the influences of the time-varying plasma and magnetized time-varying plasma on the communication performance are investigated. Using a 5.8 GHz microwave source, the electron density and collision frequency of the time-varying glow discharge plasma are measured. An experimental platform is set up to test the bit error rates (BERs) of a variety of the modulation signals after going though the time-varying plasma channel. The experimental results show that the binary phase shift keying (BPSK) modulation signal has a minimal communication BER. Meanwhile, the variations of L-band BPSK and S-band QPSK (quadrature phase shift keying) signal's eye diagram and the constellation diagram, and the variation of energy after a magnetized plasma are observed. Compared with the un-magnetized situation, the magnetized plasma communication performance is greatly improved and the BER becomes much lower. The results prove that the magnetic field can effectively relieve the amplitude modulation and phase modulation caused by the plasma channel.
Keywords: time-varying channel/
magnetized plasma/
modulation system/
reliable communication
