新型层间迹正交码可见光双层成像通信系统

发布时间：2018-01-01 10:31

本文关键词：新型层间迹正交码可见光双层成像通信系统　出处：《光学学报》2016年12期 　论文类型：期刊论文

【摘要】：为提升可见光双层叠加系统的通信性能,提出了一种新型叠加编码系统。该系统在充分考虑远、近距离通信特点的基础上,将迹正交编码与叠加系统相结合,使双层信号满足迹正交特性,有效消除了层间干扰,提升了信号间的欧氏距离,并获得了一定的编码增益。针对此新型系统采用复杂度为线性的求和检测算法能够获得与最大似然(ML)检测算法相同的译码性能。通过推导基于ML检测时的理论误比特率(BER)闭式解,分析了功率分配对各层传输BER性能的影响,并给出了3类星座设计方案。仿真结果表明,与现有双层叠加系统相比,基于层间迹正交码编码的新型系统可有效改善系统的通信性能。
[Abstract]:In order to improve the communication performance of double layered system of visible light, put forward a new kind of superposition encoding system. In this system, fully considered far, based on the characteristics of near distance communication, will trace orthogonal encoding and superposition system combined the double track signal to meet the orthogonality, effectively eliminates the interference between layers, enhance the signal the Euclidean distance, and obtained a certain encoding gain. In view of this new system with complexity is linear summation detection algorithm can be obtained with the maximum likelihood (ML) detection algorithm. The same decoding performance by derivation based on ML detection theory of bit error rate (BER) closed solution, analysis of the impact of power allocation the transmission performance of BER layer, and gives 3 constellation design scheme. The simulation results show that compared with the existing double stack system, model system layer trace orthogonal code encoding can improve effectively communication system based on Can.

【作者单位】：中国人民解放军信息工程大学信息系统工程学院;
【基金】：国家863计划(2013AA013603) 国家自然科学基金(61271253)
【分类号】：TN929.1
【正文快照】： 可见光通信(VLC)作为一种新兴技术,在通信安全、环境保护、电磁辐射等方面与无线通信相比有诸多优势[1-3]。近些年来,许多学者致力于将VLC技术应用于智能交通系统(ITS)中,将成像传感器(IS)和发光二极管(LED)阵列分别作为收、发端,构建VLC多入多出(MIMO)成像通信系统[4-6]。在

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