可见光多维无载波幅度相位调制系统

王旭东; 崔玉; 吴楠

doi:10.11999/JEIT170276

可见光多维无载波幅度相位调制系统

doi: 10.11999/JEIT170276

基金项目:

国家自然科学基金(61371091)

计量
- 文章访问数: 1224
- HTML全文浏览量: 163
- PDF下载量: 202
- 被引次数: 0
出版历程
- 收稿日期: 2017-03-31
- 修回日期: 2017-09-11
- 刊出日期: 2017-12-19

Multi-dimensional Carrierless Amplitude and Phase Modulation for Visible Light Communication System

Funds:

The National Natural Science Foundation of China (61371091)

摘要

摘要: 针对室内可见光通信调制技术和多用户接入问题，该文基于直流偏置和极性编码信号单极化思想提出两种系统复杂度低、频带利用率高的可见光多维无载波幅度相位(DCO-MCAP, U-MCAP)调制方案。首先利用最大最小优化算法构建无频谱泄漏的频域目标方程，采用完全重建(PR)条件作为非线性约束方程，求取时域正交的多维CAP滤波器组，然后分别采用添加直流偏置和零值位置极性编码实现信号单极性，以满足可见光通信强度调制/直接检测的要求。基于朗伯辐射模型，可见光背景噪声建模为加性高斯白噪声(AWGN)，推导了DCO- CAP/MCAP, U-CAP/MCAP 4种调制方案的误符号率理论解，仿真验证了其准确性。在5 m5 m3 m的室内场景下，仿真对比分析了2维、3维、4维可见光CAP调制系统的频带利用率、误码率等性能。结果表明，相同星座尺寸时，多维CAP调制的误码性能明显优于传统2维；相同频带利用率时，3种维度系统误码性能相近，可见光多维CAP调制为多用户接入提供可能性。此外，讨论了信道参数对可见光CAP系统的影响，发射机辐射角与收发信机之间距离都与信噪比损失呈现出正相关性。
- 可见光通信 /
- 多维无载波幅度相位调制 /
- 完全重建 /
- 频带利用率 /
- 误符号速率
Abstract: Considering the modulation technique and multiple-access topology for indoor Visible Light Communication (VLC), two Multi-dimensional Carrierless Amplitude and Phase (Multi-CAP) modulation schemes are proposed in this paper, namely, DC biased Optical Multi-CAP (DCO-MCAP) and Unipolar optical Multi-CAP (U-MCAP). The design object is modeled as a mini-max optimization problem with a non-constraint condition named Perfect Reconstruction (PR), which can be solved by the quadratic programming algorithm. Only real and unipolar signals can be intensity modulated, therefore several modifications are performed in CAP VLC systems accordingly. A DC bias added to the signal and a pair of new samples including a zero padding to mark signal polarity are adopted to obtain unipolar signal respectively. According to Lambertian reflection model and considering light of sight link corrupted by Additive White Gaussian Noise (AWGN), the theoretical Symbol Error Rate (SER) of DCO-CAP/MCAP and U-CAP/MCAP are derived and corroborated by Monte Carlo simulations. Meanwhile, the performance of three kinds of dimensional (2D, 3D, 4D) optical CAP systems are analyzed and compared in the room in size of 5 m5 m3 m. The numerical results show that the error performance of optical Multi-CAP is superior to that of traditional two dimensional optical CAP with the same constellation, and the multi-CAP (3D or 4D) scheme can not only achieve approximate SER performance with respect to the same bandwidth efficiency, but also enable multiple access in VLC system. In addition, the effects of channel parameters on the system performance are evaluated which shows that the loss of SNR obviously presents positive relation with the increase of the radiation angle or the distance between the transmitter and the receiver.
- Visible Light Communication (VLC) /
- Multi-dimensional Carrierless Amplitude and Phase (Multi-CAP) modulation /
- Perfect Reconstruction (PR) /
- Bandwidth efficiency /
- Symbol Error Rate (SER)

HTML全文

参考文献(22)

JOVICIC A, LI J, and RICHARDSON T. Visible light communication: Opportunities, challenges and the path to market[J]. IEEE Communications Magazine, 2013, 51(12): 26-32. doi: 10.1109/MCOM.2013.6685754.

ELGALA H, MESLEH R, and HAAS H. Indoor optical wireless communication: potential and state-of-the-art[J]. IEEE Communications Magazine, 2011, 49(9): 56-62. doi: 10.1109/MCOM.2011.6011734.

GHASSEMLOOY Z, POPOOLA W, and RAJBHANDARI S. Optical Wireless Communication[M]. Boca Raton London, New York: CRC Press, 2012: 77-99.

OLMEDO M I, ZUO T J, JENSEN J B, et al. Multiband carrierless amplitude phase modulation for high capacity optical data links[J]. Journal of Lightwave Technology, 2014, 32(4): 798-804. doi: 10.1109/JLT.2013.2284926.

WEI Chiachien, WU Fangming, and CHEN Zhenyu. Indoor VLC system with multiple LEDs of different path lengths employing space-time block-coded DMT/CAP modulation [Invited][J]. IEEE/OSA Journal of Optical Communications and Networking, 2015, 7(3): A459-A466. doi: 10.1364/JOCN. 7.00A459.

WU Fangming, LIN Chunting, WEI Chiachien, et al. 3.22-Gb/s WDM visible light communication of a single RGB LED employing carrier-less amplitude and phase modulation [C]. Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), Anaheim, CA, 2013: 1-3.

WANG Yiguang, LI Tao, WANG Yuanquan, et al. High speed WDM VLC system based on multi-band CAP64 with weighted pre-equalization and modified CMMA based post-equalization[J]. IEEE Communications Letters, 2014, 18(10): 1719-1722. doi: 10.1109/LCOMM.2014.2349990.

YAO Kaili, WU Nan, WANG Xudong, et al. A novel power efficient modulation scheme for VLC systems[C]. 2016 IEEE/CIC International Conference on Communications in China (ICCC), Chengdu, 2016: 1-6. doi: 10.1109/ICCChina. 2016.7636788.

吴楠, 王旭东, 姚凯莉, 等. 可见光通信中的无载波位相调制技术[J]. 电子与信息学报, 2017, 39(2): 360-366. doi: 10.11999 /JEIT160343.

WU Nan, WANG Xudong, YAO Kaili, et al. Carrier-less position/phase modulation for visible light communications [J]. Journal of Electronics Information Technology, 2017, 39(2): 360-366. doi: 10.11999/JEIT160343.

LONG S, KHALIGHI M A, WOLF M, et al. Performance of carrier-less amplitude and phase modulation with frequency domain equalization for indoor visible light communications [C]. 2015 4th International Workshop on Optical Wireless Communications (IWOW), Istanbul, 2015: 16-20. doi: 10. 1109/IWOW.2015.7342257.

GRZEGORZ S. Comparison of efficiency of N-dimensional CAP modulations[J]. Journal of Lightwave Technology, 2014, 32(14): 2516-2523. doi: 10.1109/JLT.2014.2329141.

SUN Lin, DU Jiangbing, and HE Zuyuan. Multiband three-dimensional carrierless amplitude phase modulation for short reach optical communications[J]. Journal of Lightwave Technology, 2016, 34(13): 3103-3109. doi: 10.1109/JLT.2016. 2559783.

OTHMAN M B, XU Zhang, LEI Deng, et al. Experimental investigations of 3-D-/4-D-CAP modulation with directly modulated VCSELs[J]. IEEE Photonics Technology Letters, 2012, 24(22): 2009-2012. doi: 10.1109/LPT.2012.2217811.

JAAFAR M B, OTHMAN M B, RIDZUAN N M, et al. Simulation of high dimensionality carrierless amplitude phase (CAP) modulation technique[C]. 2016 IEEE 6th International Conference on Photonics (ICP), Kuching, 2016: 1-3. doi: 10.1109/ICP.2016.7510003.

DISSANAYAKE S D and ARMSTRONG J. Comparison of ACO-OFDM, DCO-OFDM and ADO-OFDM in IM/DD Systems[J]. Journal of Lightwave Technology, 2013, 31(7): 1063-1072. doi: 10.1109/JLT.2013.2241731.

王旭东, 徐宪莹, 吴楠, 等. 室内可见光OFDM通信系统调光控制技术[J]. 光子学报, 2015, 44(11): 1106002. doi: 10.3788/ gzxb20154411.1106002.

WANG Xudong, XU Xianying, WU Nan, et al. Dimming control technique for OFDM based indoor visible light communication system[J]. Acta Photonica Sinica, 2015, 44(11): 1106002. doi: 10.3788/gzxb20154411.1106002.

吴楠, 王旭东, 胡晴晴, 等. 基于多LED的高精度室内可见光定位方法[J]. 电子与信息学报, 2015, 37(3): 727-732. doi: 10.11999/JEIT140725.

WU Nan, WANG Xudong, HU Qingqing, et al. Multiple LED based high accuracy indoor visible light positioning scheme[J]. Journal of Electronics Information Technology, 2015, 37(3): 727-732. doi: 10.11999/JEIT140725.

JHA M K, ADDANKI Ai, LAKSHMI S Y V, et al. Channel coding performance of optical MIMO indoor visible light communication[C]. 2015 International Conference on Advances in Computing, Communications and Informatics (ICACCI), Kochi, 2015: 97-102. doi: 10.1109/ICACCI.2015. 7275591.

TSONEV D, SINANOVIC S, and HAAS H. Novel unipolar orthogonal frequency division multiplexing (U-OFDM) for optical wireless[C]. IEEE 75th Vehicular Technology Conference (VTC 2012 Spring), Yokohama, Japan, 2012: 1-5. doi: 10.1109/VETECS.2012.6240060.

施引文献

资源附件(0)

访问统计