期刊
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
卷 68, 期 5, 页码 4328-4341出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2019.2902962
关键词
Hypersonic vehicle; integrated channel; plasma sheath channel; electromagnetic wave; statistical characteristics
资金
- National Natural Science Foundation of China [61627901, 61871302, 61771370, 61873210, 61431010]
- National Basic Research Program of China [2014CB340205]
- National Defense Basic Scientific Research Program of China [JCKY2016110C040]
During hypersonic flight, the communication link is affected by the multipath effect and plasma sheath. As a result, envelopes and phases of the wireless signals fluctuate with time. In this paper, an integrated channel model is proposed based on geometric propagation theory. The statistical characteristics of the plasma sheath channel are carefully studied. The probability density functions, the correlation coefficient between envelope and phase, the autocorrelation function, the level-crossing rate, and the average fade duration are derived and detailed based on electromagnetic propagation theory. Two numerical examples are also used to demonstrate the effectiveness of the model. All statistical curves agree with the theoretical curves. The proposed model comprehensively considers the multipath effect, the Doppler effect, and the plasma sheath effect. It is crucial to plausibly understand the blackout problem to facilitate performance evaluations of hypersonic vehicle communication systems.
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