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可见光并行高速通信交织分多址技术研究

Interleave-Division Multiple-Access for High-Speed Visible Light Communication in Parallel

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摘要

商用发光二极管(LED)调制带宽受限制约着可见光通信的传输速率,而灯具内通常有多个LED灯芯,为此提出了通过多个灯芯同时作为通信信源,利用交织分多址技术并行叠加,单一光电检测器(PD)接收的高速传输方案。由于LED驱动电压非负、PD只检测光强信息,为此提出了基于单载波开关键控(OOK)调制的发送传输结构、接收端多LED检测和重复码译码算法;研究了可见光OOK调制的信噪比(SNR)性能估计算法;仿真中,与等条件的多载波直流(DC)偏置光正交频分复用相比较,该方案在误码率(BER)、抗非线性等性能上更优。

Abstract

The transmission rate of the commercial light emitting diode is limited by modulation bandwidth in visible light communication. While there are more than one light emitting diode (LED) wicks in a lamp, so a high-speed transmission system scheme that the multi-LED wicks transmit data in a single lamp simultaneously, which utilizes the interleave-division multiple-access technology to superimpose mode in parallel and uses a single photodiode to receive data, is designed. As the driving voltage of LED is non-negative and photoelectric detector (PD) only detects the light intensity information, the transmitter structure, the receiver detection algorithm of multi-LED wicks and the decoding algorithm of repetition code based on single carrier on-off keying (OOK) modulation are proposed. And the signal noise ratio (SNR) performance evaluation algorithm based on OOK modulation is researched. Finally, compared with the multi-carrier direct current (DC)-biased optical orthogonal frequency division multiplexing under the same conditions in the simulation, the proposed scheme is more superior in the performance of anti-nonlinearity and bit error ratio (BER).

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中图分类号:TN929.12

DOI:10.3788/aos201434.0406003

所属栏目:光纤光学与光通信

基金项目:国家863计划(2013AA013603)、国家自然科学基金(61271253)

收稿日期:2013-10-14

修改稿日期:2013-12-06

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作者单位    点击查看

王超:信息工程大学信息系统工程学院, 河南 郑州 450002
朱义君:信息工程大学信息系统工程学院, 河南 郑州 450002
杨育红:信息工程大学信息系统工程学院, 河南 郑州 450002

联系人作者:王超(xxgcwangchao@163.com)

备注:王超(1989—),男,硕士研究生,主要从事可见光通信方面的研究。

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