Channel capacity analysis of non-line-of-sight ultraviolet communication in noncoplanar geometry based on traversing tiny unit method

被引：0
作者：
Song P. [1 ]
Su C. [1 ]
Zhao T. [2 ]
Chen J. [1 ]
Zhu L. [1 ]
Zhang X. [1 ]
机构：
[1] School of Electronic and Information, Xi'an Polytechnic University, Xi'an
[2] Department of Electronics Engineering, Xi'an University of Technology, Xi'an
来源：
Tongxin Xuebao/Journal on Communications | 2019年 / 40卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Channel capacity; Non-line-of-sight; Optical communication; Traversing tiny unit method; Ultraviolet scattering;
D O I：
10.11959/j.issn.1000-436x.2019103
中图分类号：
学科分类号：
摘要：
Channel capacity reflects the ability of the system to transmit information without errors. The path loss and impulse response of the system were calculated based on traversing tiny unit method, and then the frequency response of the system was obtained by the discrete Fourier transform of the impulse response sampling sequence, and the 3 dB bandwidth of the system was calculated. Considering the shot noise caused by signal light, the signal-to-noise ratio of the system was obtained according to the quantum limit method, and then the relationship between the channel capacity and the geometric parameters of transmitter and receiver in non-line-of-sight noncoplanar ultraviolet communication system were simulated and analyzed by Shannon formula. The results show that the channel capacity decreases with the increase of the off axis angle and the communication distance. When the elevation angles of transmitter and receiver are less than 40°, the channel capacity decreases rapidly with the increase of the elevation angles of transmitter and receiver, and the transmitter elevation angle has a great influence on the channel capacity. The system channel capacity is almost constant with the increase of divergence angle, and the larger the receiver field of view angle, the greater the system channel capacity. © 2019, Editorial Board of Journal on Communications. All right reserved.
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页码：144 / 152
页数：8
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