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| 1 | 联合光源布局的多小区协作可见光通信系统资源分配算法显示文摘针对室内可见光通信(VLC)系统中存在小区间干扰的问题,提出一种联合光源布局的多小区协作多输入多输出(MIMO)正交频分多址(OFDMA)VLC系统资源分配算法。首先,在不影响照明的前提下,通过优化光源布局,将小区干扰限制在2个LED覆盖范围内;然后,引入协作MIMO技术,以用户公平性为优化目标;最后,对基于空分复用(SMP)和重复编码(RC)这2种协作模式的MIMO OFDMA VLC系统资源分配性能进行仿真。仿真结果表明:2种协作模式的MIMO OFDMA VLC系统的性能均优于单输入单输出(SISO)OFDMA VLC系统。基于RC模式的VLC系统对信道相关性鲁棒,其传输速率约为SISO OFDMA VLC系统的1.2倍。当信道矩阵条件数低于6时,基于SMP模式的VLC系统因获得较大的复用增益性能更优;当信道矩阵条件数等于2时,其VLC系统数据传输速率约为SISO OFDMA VLC系统的1.32倍。 | 郭心悦 张慧 罗也 | 2022 | 光通信技术2022，46，4： | 4 |
| 2 | Secure orthogonal time-frequency multiplexing with two-dimensional encryption for optical-wireless communications显示文摘This paper firstly,to the best of our knowledge,proposed two-dimensional(2D)encryption based on the Arnold transformation for implementing a secure DC-biased optical orthogonal time-frequency multiplexing(DCO-OTFM)in optical-wireless communications(OWCs).The encrypted data is transformed to the particular 2D matrix and decrypted by the only key to get the correct information.Meanwhile,the number of keys in 2D encryption is enormous,which prevents eavesdroppers from exhaustively searching secret keys rapidly to find the right decryption.Numerical results demonstrate that the secure DCO-OTFM based on 2D encryption can effectively prevent signal decryption from the eavesdropper,which has good secure performance for applying in OWC. | 钟捷 周骥 高社成 刘伟平 | 2021 | Chinese Optics Letters2021，19，5： | 0 |
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