BER Performance of MIMO-FTN-OWC Communication over Log-normal Fading Channel

LI Wen-wen; CAO Ming-hua; ZHANG Yue; WANG Hui-qin; LIU Ling

doi:10.13756/j.gtxyj.2022.06.011

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BER Performance of MIMO-FTN-OWC Communication over Log-normal Fading Channel

更新时间：2023-01-29

- BER Performance of MIMO-FTN-OWC Communication over Log-normal Fading Channel
- Study on Optical Communications Issue 6, Pages: 64-69(2022)
- 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：
- 基金信息：
- DOI：10.13756/j.gtxyj.2022.06.011
  CLC： TN929.12
- Published：10 December 2022，
  
  Received：11 April 2022，
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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 (6):64-69(2022)
DOI：

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 (6):64-69(2022) 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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Related Institution

Shenzhen International Graduate School, Tsinghua University

Peng Cheng Laboratory

Institute of Lightwave Technology, Beijing Jiaotong University

Key Laboratory of All-Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University

School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications

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