室内可见光通信中的自适应STBC MIMO-OFDM系统设计

郭心悦; 李双双; 郭阳; 肖江南

doi:doi:10.3788/irla201847.0222001

红外与激光工程, 2018, 47 (2): 0222001, 网络出版: 2018-04-26

室内可见光通信中的自适应STBC MIMO-OFDM系统设计

Adaptive STBC MIMO-OFDM system design for indoor visible light communications

论文大纲

郭心悦 ^*李双双郭阳肖江南

作者单位

上海理工大学光电信息与计算机工程学院上海市现代光学系统重点实验室, 上海 200093

可见光通信空时块码多输入多输出正交频分复用功率和比特分配 visible light communication space-time block coding multiple-input multiple-output orthogonal frequenc power-and-bit allocation

摘要

提出基于空时块码(STBC)调制的自适应多输入多输出正交频分复用（MIMO-OFDM）可见光通信(VLC)系统, 该系统能够克服MIMO信道相关性并实现可靠通信。同时, 引入功率比特分配(PBA)与OFDM相结合, 以适应信道传输条件从而有效提高频谱效率。通过搭建一个2×2的MIMO-OFDM VLC演示系统, 实现了80 cm距离的传输, 实验中测得的误码率始终保持在7%的前向纠错阈值3.8×10-3之下。实验结果表明, STBC MIMO-OFDM系统对MIMO信道相关性鲁棒, 且PBA的应用能够大幅度提高数据速率。

Abstract

An adaptive multiple-input multiple-output orthogonal frequency division multiplexing(MIMO-OFDM) visible light communication(VLC) system based on space-time block coding (STBC) modulation was proposed in the paper, which can overcome the MIMO channel correlation and achieve reliable communications. Meanwhile, power-and-bit allocation(PBA) was combined with OFDM in order to adapt to the channel and improve the spectral efficiency. Then a 2×2 MIMO-OFDM VLC transmission over a distance of 80 cm was demonstrated, where the measured bit error rates were all below 7% of the pre-forward-error-correction threshold of 3.8×10-3. Experimental results show that the STBC MIMO-OFDM system is robust to MIMO channel correlation, where the data rates can be greatly improved by applying the PBA.

参考文献

[1] Pathak P H, Feng X, Hu P, et al. Visible light communication, networking, and sensing: a survey, potential and challenges [J]. IEEE Communications Surveys & Tutorials, 2015, 17(4): 2047-2076.

[2] Shen Zhenmin, Lan Tian, Wang Yun. Simulation and analysis for indoor visible-light communication based on LED[J]. Infrared and Laser Engineering, 2015, 44(8): 2496-2500. (in Chinese)

[3] Mesleh R, Elgala H, Haas H. Optical spatial modulation [J]. IEEE/OSA Journal of Optical Communications & Networking, 2011, 3 (3): 234-244.

[4] Chi N, Wang Y, Wang Y, et al. Ultra high speed single red-green-blue light-emitting diode based visible light communication system utilizing advanced modulation formats [J]. Chinese Optics Letters, 2014, 12(1): 22-25.

[5] Huang X, Wang Z, Shi J, et al. 1.6 Gbit/s phosphorescent white LED based VLC transmission using a cascaded pre-equalization circuit and a differential outputs PIN receiver [J]. Optics Express, 2015, 23(17): 22034-22042.

[6] Deng L, Fan Y. Research on the performance of indoor visible light non-DC-biased OFDM system based on color/frequency/space three-dimension resources multiplexing [J]. Infrared and Laser Engineering, 2016, 45 (7): 0722002. (in Chinese)

[7] Wang Y, Chi N, Wang Y, et al. High-speed quasi-balanced detection OFDM in visible light communication [J]. Optics Express, 2013, 21(23): 27558-27564.

[8] Bykhovsky D, Arnon S. An experimental comparison of different bit-and-power-allocation algorithms for DCO-OFDM [J]. Journal of Lightwave Technology, 2014, 32(8): 1559-1564.

[9] Guo X, Li X. Experimental demonstration of an adaptive orthogonal frequency division multiplexing visible light communication system[J]. Chinese Optics Letters, 2016, 14(11): 23-27.

[10] Wang Y, Chi N. Demonstration of high-speed 2×2 non-imaging MIMO Nyquist single carrier visible light communication with frequency domain equalization[J]. Journal of Lightwave Technology, 2014, 32(11): 2087-2093.

[11] Zeng L, O′Brien D C, Minh H L, et al. High data rate multiple input multiple output (MIMO) optical wireless communications using white LED lighting [J]. IEEE Journal on Selected Areas in Communications, 2009, 27(9): 1654-1662.

[12] Hong Y, Wu T, Chen L. On the performance of adaptive MIMO-OFDM indoor visible light communications[J]. IEEE Photonics Technology Letters, 2016, 28(8): 907-910.

[13] Uysal M, Georghiades C N. Effect of spatial fading correlation on performance of space-time codes[J]. Electronics Letters, 2001, 37(3):181-183.

[14] Wei C, Wu F, Chen Z, et al. Indoor VLC system with multiple LEDs of different path lengths employing space-time block-coded DMT/CAP modulation [J]. IEEE/OSA Journal of Optical Communications & Networking, 2015, 7(3): 459-466.

[15] Simon M K, Vilnrotter V A. Alamouti-type space-time coding for free-space optical communication with direct detection[J]. IEEE Transactions on Wireless Communications, 2005, 4(1): 35-39.

[16] Shi J, Wang Y, Chi N, et al. Enhanced performance using STBC aided coding for LED-based multiple input single output visible light communication network [J]. Microwave & Optical Technology Letters, 2015, 57(12): 2943-2946.

[17] Wang Y, Wang Y, Chi N. Experimental verification of performance improvement for a gigabit wavelength division multiplexing visible light communication system utilizing asymmetrically clipped optical orthogonal frequency division multiplexing [J]. Photonics Research, 2014, 2(5): 138-142.

[18] Heath R W, Paulraj A J. Switching between diversity and multiplexing in MIMO systems [J]. IEEE Transactions on Communications, 2005, 53(6): 962-968.

郭心悦, 李双双, 郭阳, 肖江南. 室内可见光通信中的自适应STBC MIMO-OFDM系统设计[J]. 红外与激光工程, 2018, 47(2): 0222001. Guo Xinyue, Li Shuangshuang, Guo Yang, Xiao Jiangnan. Adaptive STBC MIMO-OFDM system design for indoor visible light communications[J]. Infrared and Laser Engineering, 2018, 47(2): 0222001.

室内可见光通信中的自适应STBC MIMO-OFDM系统设计

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