新型层间迹正交码可见光双层成像通信系统

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

A novel overlapping code system is proposed to enhance the communication performance of double-layer overlay coding visible light communication system. With full consideration of the characteristics of far and near distance communication, the proposed system makes a creative combination of trace orthogonal coding and overlapping systems. This combination ensures the trace orthogonal property of two layers signals and therefore eliminates the interlayer interference. Moreover, an enhanced Euclidean distance and coding gain can be obtained to extract better performance. For this system, the same decoding performance can be obtained with the sum detection algorithm of linear complexity as well as with maximum-likelihood (ML) detection. The effect of different power allocations on system performance is analyzed by deriving the closed expression of bit error rate based on ML, and three constellation designs are then presented. Simulation results show that compared with existing double-layer overlapping systems, the new system based on layered trace-orthogonal coding can effectively improve communication performance.

参考文献

[1] 付红双, 朱义君. 室内直射环境下白光LED的多输入多输出信道相关性分析［J］. 光学学报, 2013, 33(9): 0906002.

Fu Hongshuang, Zhu Yijun. Analysis of the correlation of optical multiple-input multiple-output channel using white LED lighting in indoor line of sight environments［J］. Acta Optica Sinica, 2013, 33(9): 0906002.

[2] 陆庆峰, 季新生, 黄开枝, 等. 降低可见光通信不均匀限幅正交频分复用系统非线性限幅失真的功率分配方法［J］. 光学学报, 2014, 34(7): 0706004.

Lu Qingfeng, Ji Xinsheng, Huang Kaizhi, et al. Power allocation method for reducing nonlinearity clipping distortion in asymmetrically clipped orthogonal frequency division multiplexing based visible light communication［J］. Acta Optica Sinica, 2014, 34(7): 0706004.

[3] Wang T Q, Sekercioglu Y A, Armstrong J. Analysis of an optical wireless receiver using a hemispherical lens with application in MIMO visible light communications［J］. Journal of Lightwave Technology, 2013, 31(11): 1744-1754.

[4] 高俊英, 王德昌, 姚建国. 基于摄像头的MIMO可见光无线通信系统［J］. 光学学报, 2015, 35(1): 0106004.

Gao Junying, Wang Dechang, Yao Jianguo. MIMO visible light wireless communication system employed camera-based receivers［J］. Acta Optica Sinica, 2015, 35(1): 0106004.

[5] Takai I, Ito S, Yasutomi K, et al. LED and CMOS image sensor based optical wireless communication system for automotive applications［J］. IEEE Photonics Journal, 2013, 5(5): 6801418.

[6] Yamazato T, Takai I, Okada H, et al. Image-sensor-based visible light communication for automotive applications［J］. IEEE Communications Magazine, 2014, 52(7): 88-97.

[7] Ashok A, Gruteser M, Mandayam N, et al. Characterizing multiplexing and diversity in visual MIMO［C］. IEEE 45th Annual Conference on Information Sciences and Systems, 2011: 1-6.

[8] Arai S, Mase S, Yamazato T, et al. Experimental on hierarchical transmission scheme for visible light communication using LED traffic light and high-speed camera［C］. IEEE 66th on Vehicular Technology Conference, 2007: 2174-2178.

[9] Nagura T, Yamazato T, Katayama M, et al. Improved decoding methods of visible light communication system for ITS using LED array and high-speed camera［C］. IEEE 71st on Vehicular Technology Conference, 2010: 1-5.

[10] Nishimoto S, Nagura T, Yamazato T, et al. Overlay coding for road-to-vehicle visible light communication using LED array and high-speed camera［C］. IEEE 14th International Conference on Intelligent Transportation Systems, 2011: 1704-1709.

[11] Zhu H Y, Zhu Y J, Zhang J K, et al. A double-layer VLC system with low-complexity ML detection and binary constellation designs［J］. IEEE Communications Letters, 2015, 19(4): 561-564.

[12] Nishimoto S, Yamazato T, Okada H, et al. High-speed transmission of overlay coding for road-to-vehicle visible light communication using LED array and high-speed camera［C］. IEEE Globecom Workshops, 2012: 1234-1238.

[13] 王超, 朱义君, 杨育红. 可见光并行高速通信交织分多址技术研究［J］. 光学学报, 2014, 34(4): 0406003.

Wang Chao, Zhu Yijun, Yang Yuhong. Interleave-division multiple-access for high-speed visible light communication in parallel［J］. Acta Optica Sinica, 2014, 34(4): 0406003.

[14] Biagi M, Vegni A M, Pergoloni S, et al. Trace-orthogonal PPM-space time block coding under rate constraints for visible light communication［J］. Journal of Lightwave Technology, 2015, 33(2): 481-494.

李鹏旭, 杨育红, 朱义君, 张艳语. 新型层间迹正交码可见光双层成像通信系统[J]. 光学学报, 2016, 36(12): 1206003. Li Pengxu, Yang Yuhong, Zhu Yijun, Zhang Yanyu. Novel Double-Layer Imaging Visible Light Communication System with Layered Trace-Orthogonal Coding[J]. Acta Optica Sinica, 2016, 36(12): 1206003.

新型层间迹正交码可见光双层成像通信系统

关于本站 Cookie 的使用提示

全站搜索

新型层间迹正交码可见光双层成像通信系统

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索