Propagation of phase modulation signals in time-varying plasma

被引：32
|
作者：
Yang, Min [1 ]
Li, Xiaoping [1 ]
Wang, Di [1 ]
Liu, Yanming [1 ]
He, Pan [1 ]
机构：
[1] Xidian Univ, Sch Aerosp Sci & Technol, Xian 710071, Peoples R China
来源：
AIP ADVANCES | 2016年 / 6卷 / 05期
关键词：
REENTRY; COMMUNICATION;
D O I：
10.1063/1.4950694
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of time-varying plasma to the propagation of phase modulation signals are investigated in this paper. Through theoretical analysis, the mechanism of the interaction between the time-varying plasma and the phase modulation signal is given. A time-varying plasma generator which could produce arbitrary time-varying plasma is built by adjusting the discharge power. A comparison of results from experiment and simulation prove that the time-varying plasma could cause the special rotation of QPSK (Quadrature Phase Shift Keying) constellation, and the mechanism of constellation point's rotation is analyzed. Additionally, the experimental results of the QPSK signals' EVM (Error Vector Magnitude) after time-varying and time-invariant plasma with different omega(p)/omega are given. This research could be used to improve the TT&C (Tracking Telemeter and Command) system of re-entry vehicles. (C) 2016 Author(s).
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页数：8
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