Journal of Applied Optics, Volume. 45, Issue 2, 475(2024)
Virtual time reversal method for channel equalization in non-orthogonal multiple access optical communication systems
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Fig. 3. Block diagram of virtual time-reversal principle of visible light channel
Fig. 5. NOMA-VLC communication measurement platform with VTRM equalization
Fig. 6. Constellation diagram of user 1 and user 2 after demodulation
Fig. 8. BER performance analysis of different channel equalization methods
Table 1. Parameters setting
View tableView in ArticleTable 1. Parameters setting
VLC参数设置 数 值 NOMA参数设置 数 值 房间尺寸（长×宽×高）/m 6×6×4 Turbo编码长度/bit 1280 LED发射器放置位置/m (3,3,4) NOMA功率分配 固定功率分配 LED FOV/ 80 NOMA用户功率 用户1:0.65 用户2:0.35 LED照明强度/ 60 PD接收器 PD1:(5,1.5,0) PD2:(4,0.5,0) LED的功率 10 OFDM子载波个数 64 光电二极管响应度/(A/W) 0.53 循环前缀CP个数 16 光源半功率角 70 IFFT/FFT点数 64 墙面反射率 0.8 调制方式 4-QAM 光接收面积 0.01 多径信道数 4
Table 2. SNR performance analysis under different channel equalization methods
View tableView in ArticleTable 2. SNR performance analysis under different channel equalization methods
信道均衡 VTRM方法的SNR MLSE方法的SNR RLS方法的SNR BER 用户1/dB 用户2/dB 用户1/dB 用户2/dB 用户1/dB 用户2/dB 7.75 8.1 8.2 8.8 10.3 11.1 10−3 7.9 8.3 8.6 9.2 10.9 11.9 10−4 8.2 9 9.5 10.2 11.8 12.8 10−5 8.3 9.3 10.1 10.5 12.3 13.7
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Shuangling GU, Feng ZHANG, Xia PENG, Li ZHAO. Virtual time reversal method for channel equalization in non-orthogonal multiple access optical communication systems[J]. Journal of Applied Optics, 2024, 45(2): 475
Paper Information
Category: Research Articles
Received: Apr. 17, 2023
Accepted: --
Published Online: May. 28, 2024
The Author Email: ZHANG Feng (张峰（1979—）)
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