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Log-normal信道下MIMO-FTN-OWC系统BER性能分析
BER Performance of MIMO-FTN-OWC Communication over Log-normal Fading Channel
- 光通信研究 2022年第6期 页码：64-69
- 作者机构：
兰州理工大学 计算机与通信学院，兰州 730050
- 作者简介：
李文文(1995-)，女，河南周口人。硕士，主要研究方向为光无线通信。
曹明华，教授。E-mail：caominghua@lut.edu.cn
- 基金信息：国家自然科学基金资助项目(61875080;61861026);甘肃省科技计划资助项目(20JR5RA472)
DOI：10.13756/j.gtxyj.2022.06.011
中图分类号： TN929.12纸质出版日期：2022-12-10，
收稿日期：2022-04-11，
扫 描 看 全 文
李文文, 曹明华, 张悦, 等. Log-normal信道下MIMO-FTN-OWC系统BER性能分析[J]. 光通信研究, 2022,(6):64-69.
LI Wen-wen, CAO Ming-hua, ZHANG Yue, et al. BER Performance of MIMO-FTN-OWC Communication over Log-normal Fading Channel[J]. Study on Optical Communications, 2022,(6):64-69.
李文文, 曹明华, 张悦, 等. Log-normal信道下MIMO-FTN-OWC系统BER性能分析[J]. 光通信研究, 2022,(6):64-69. DOI： 10.13756/j.gtxyj.2022.06.011.
LI Wen-wen, CAO Ming-hua, ZHANG Yue, et al. BER Performance of MIMO-FTN-OWC Communication over Log-normal Fading Channel[J]. Study on Optical Communications, 2022,(6):64-69. DOI： 10.13756/j.gtxyj.2022.06.011.
摘要
超奈奎斯特(FTN)技术可以提高无线光通信(OWC)系统的频谱效率，但信号在传输过程中会受到人为引入码间干扰(ISI)和大气湍流的影响，导致系统误码率(BER)性能恶化。针对此问题，文章构建了4阶脉冲幅度调制(4PAM)的多输入多输出(MIMO)FTN-OWC系统，通过采用MIMO技术抑制了大气湍流对信号的影响。在此基础上，推导了该系统在Log-normal信道下的理论BER，并分析了信道间相关性对系统BER性能的影响。仿真结果表明，当BER为10
-4
时，2×2 MIMO-FTN系统的BER性能较单输入单输出(SISO)-FTN系统提高了9.5 dB。当信道相关且相关因子低于0.6时，MIMO-FTN系统的BER性能优于SISO-FTN系统。
Abstract
Faster-than-Nyquist (FTN) technology can improve the spectral efficiency of Optical Wireless Communications (OWC). However
it is affected by the artificially introduced Inter-Symbol Interference (ISI) and atmospheric turbulence
which leads to the degradation of Bit Error Rate (BER) performance. To deal with this issue
a PAM modulated Multiple Input Multiple Output (MIMO)-FTN-OWC system is proposed
and MIMO technology is utilized to suppress the influence of atmospheric turbulence. Furthermore
the theoretical BER in log-normal fading channel is deduced
and the influence of channel correlation on the BER performance is analyzed. The simulation results show that the BER performance of 2×2 MIMO-FTN system is 9.5 dB higher than that of Single-Input Single-Output (SISO)-FTN system when BER is 10
-4
. In addition
the MIMO-FTN system has better BER performance than that of SISO-FTN system when the channel spatial correlation coefficient is lower than 0.6.
关键词
无线光通信超奈奎斯特多输入多输出误码率性能空间相关性
Keywords
OWCFTNMIMOBER performancespatial correlation
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