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多LED可见光定位通信一体化稳健功率分配

杨瑞鑫 张冠杰 马帅 柴进晋 徐刚 李世银

杨瑞鑫, 张冠杰, 马帅, 柴进晋, 徐刚, 李世银. 多LED可见光定位通信一体化稳健功率分配[J]. 电子与信息学报, 2024, 46(4): 1186-1195. doi: 10.11999/JEIT230406
引用本文: 杨瑞鑫, 张冠杰, 马帅, 柴进晋, 徐刚, 李世银. 多LED可见光定位通信一体化稳健功率分配[J]. 电子与信息学报, 2024, 46(4): 1186-1195. doi: 10.11999/JEIT230406
YANG Ruixin, ZHANG Guanjie, MA Shuai, CHAI Jinjin, XU Gang, LI Shiyin. Robust Power Allocation for Multi-LED Integrated Visible Light Positioning and Communication[J]. Journal of Electronics & Information Technology, 2024, 46(4): 1186-1195. doi: 10.11999/JEIT230406
Citation: YANG Ruixin, ZHANG Guanjie, MA Shuai, CHAI Jinjin, XU Gang, LI Shiyin. Robust Power Allocation for Multi-LED Integrated Visible Light Positioning and Communication[J]. Journal of Electronics & Information Technology, 2024, 46(4): 1186-1195. doi: 10.11999/JEIT230406

多LED可见光定位通信一体化稳健功率分配

doi: 10.11999/JEIT230406
基金项目: 国家自然科学基金(61771474),中国矿业大学未来科学家计划(2022WLKXJ016),江苏省研究生科研与实践创新计划(KYCX22_2549)
详细信息
    作者简介:

    杨瑞鑫:男,博士生,研究方向为无线通信、可见光通信

    张冠杰:男,硕士生,研究方向为无线通信、语义通信

    马帅:男,副教授,研究方向为无线通信、可见光通信、语义通信

    柴进晋:女,讲师,研究方向为密码学、编码理论、OFDM

    徐刚:男,副教授,研究方向为雷达成像技术、遥感图像处理、稀疏信号处理、统计机器学习、人工智能

    李世银:男,教授,研究方向为煤矿信息化、移动目标定位

    通讯作者:

    李世银 lishiyin@cumt.edu.cn

  • 中图分类号: TN929.1

Robust Power Allocation for Multi-LED Integrated Visible Light Positioning and Communication

Funds: The National Natural Science Foundation of China (61771474), The Graduate Innovation Program of China University of Mining and Technology (2022WLKXJ016), The Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX22_2549)
  • 摘要: 为了实现可见光定位(VLP)与可见光通信(VLC)一体化信号传输,保证稳健通信和有效定位,该文提出一种基于频分复用(FDM)的可见光定位通信一体化(VLPC)信号传输方案,并设计了一种多LED VLPC稳健功率分配方案。首先提出了一种基于频分复用的VLPC传输方案,实现两种信号一体化传输,频谱资源独立分配,从而降低传输时延,提高定位实时性;然后基于定位结果进行可见光信道估计,揭示了信道估计误差、通信速率与实际定位误差之间耦合关系与统计特性;更进一步,基于所得到的耦合关系,研究了多LED VLPC联合功率分配问题,从而最小化定位误差克拉默-拉奥下界(CRLB),并满足功率约束和通信速率中断概率约束,并利用半正定松弛、最差情况条件风险值和连续凸近似等方法,将难以求解的非凸问题转化为一系列凸半正定规划问题进行迭代求解,并获得高质量可行解;最后,经过数值仿真验证,所提出的方案能够同时实现稳健通信和有效定位。稳健传输速率超过350 Mbit/s,并且当最小速率门限为200 Mbit/s,最大中断概率门限为0.01时,在直射路径加散射路径场景中,可以实现厘米级定位。
  • 图  1  多LED VLPC系统模型与信号传输框架

    图  2  UE和LED位置示意图

    图  3  通信速率累积分布函数($\mathcal{M} = \left\{ {1,2,3} \right\}$, r=350 Mbit/s)

    图  4  通信速率累积分布函数($\mathcal{M} = \left\{ {1,2,3,4,5,6} \right\}$, r=350 Mbit/s)

    图  5  定位RMSE累积分布函数($\mathcal{M} = \left\{ {1,2,3} \right\}$, r=200 Mbit/s)

    图  6  定位RMSE累积分布函数($ \mathcal{M} = \left\{ {1,2,3,4,5,6} \right\} $, r=200 Mbit/s)

    算法 1 基于CVaR和SCA的多LED VLPC稳健功率分配方法
    输入:迭代终止条件$ ϵ\ge 0 $,速率门限$r$和中断概率${P_{{\text{out}}}}$,选择功率分配$ {\mathbf{P}}_{\text{p}}^{\left( 0 \right)} $和${\mathbf{W}}_{\text{c}}^{\left( 0 \right)}$,$k = 0$;
    (1) 令$k = k + 1$, $ {{\mathbf{p}}_{{\text{p}},0}} = {\mathbf{P}}_{\text{p}}^{\left( {k - 1} \right)} $, ${{\mathbf{W}}_{{\text{c,0}}}} = {\mathbf{W}}_{\text{c}}^{\left( {k - 1} \right)}$,求解问题式(28),得到最优解$ {\mathbf{P}}_{\text{p}}^{\left( k \right)} $和${\mathbf{W}}_{\text{c}}^{\left( k \right)}$;
    (2) 如果$\left|\text{Tr}\left({{\boldsymbol{J}}}_{{\boldsymbol{u}}}^{-1}\left({{\boldsymbol{P}}}_{\text{p} }^{\left(k\right)}\right)\right)-\text{Tr}\left({{\boldsymbol{J}}}_{{\boldsymbol{u}}}^{-1}\left({{\boldsymbol{P}}}_{\text{p} }^{\left(k-1\right)}\right)\right)\right|\le \epsilon$,则循环结束,否则返回步骤(1);
    输出:最优功率分配${{\mathbf{w}}_{\text{c}}}$与${{\mathbf{P}}_{\text{p}}}$。
    下载: 导出CSV

    表  1  仿真参数

    视场角ψFOV半功率角φ1/2PD物理面积AR光学前端增益${\eta _{\rm{l}} },{\eta _{\text{c} } }$通信信号带宽Bc定位信号长度Tp噪声功率谱密度N0
    180°60°1 cm2140 MHz0.1 μs1.336×10–22 A2/Hz
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-05-12
  • 修回日期:  2023-07-05
  • 网络出版日期:  2023-07-13
  • 刊出日期:  2024-04-24

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