基于DCO-OFDM与PAM-DMT的混合传输系统性能研究  

Research on performance of hybrid transmission system based on DCO-OFDM and PAM-DMT

作　　者：李超 静永健[2] 

机构地区：[1]内蒙古信源信息技术有限公司,内蒙古呼和浩特010000 [2]内蒙古农业大学,内蒙古呼和浩特010018

出　　处：《电视技术》2016年第4期101-104,共4页Video Engineering

基　　金：国家自然科学基金项目(61462070);内蒙科技计划项目(20130364)

摘　　要：针对可见光通信(Visible Light Communication,VLC)系统中传统非对称限幅光正交频分复用(ACO-OFDM)及直流偏置光正交频分复用(DCO-OFDM)系统存在的不足,提出了一种基于DCO-OFDM与脉冲幅度调制-离散多音频调制(PAM-DMT)混合技术传输方案,并给出了一种接收端低复杂度信号检测算法。该混合传输系统不仅可以通过改变调制方式以得到更为灵活的数据传输速率,还可以在相同数据速率下叠加较小的直流信号。最后通过蒙特卡洛仿真验证了所提设计的有效性。Aiming at the existing problems in the traditional asymmetrically clipped optical OFDM （ACO-OFDM） and direct current biased OFDM （DCO-OFDM） systems, a hybrid DCO-OFDM and pulse amplitude modulated discrete multitone （PAM- DMT）-based transmission scheme is proposed. A low complexity signal detection algorithm is also proposed at the receiver. This scheme not only can achieve more flexible data rate by adjusting the modulation order, but also has lower DC than DCO-OFDM technique with the same data rate. Finally, Monte Carlo simulations are provided to confirm the effectiveness of proposed scheme.

关 键 词：可见光通信 非对称限幅光正交频分复用 直流偏置光正交频分复用 厄米特对称 误码率 

分 类 号：TN949.6[电子电信—信号与信息处理]