ACO-OFDM可见光系统中抑制峰均比的联合算法  

Combined algorithm to suppress peak-to-average ratio in ACO-OFDM visible light system

作　　者：燕慧英[1] YAN Huiying(College of Physics and Electronic Information Luo Yang Normal University,Luoyang Henan,471934)

机构地区：[1]洛阳师范学院物理与电子信息学院,河南洛阳471934

出　　处：《长江信息通信》2023年第12期121-124,共4页Changjiang Information & Communications

摘　　要：为了抑制非对称限幅光正交频分复用(ACO-OFDM)系统中存在的高峰均比,提出一种将嵌入边带信息的选择性映射(SLM)与离散哈特莱变换(DHT)相结合的联合算法。该算法首先根据SLM所用的相位因子与奇偶数子载波之间的关系,对传输的数据进行相位改变来嵌入边带信息,实现边带信息隐藏;然后对SLM算法选出的传输信号进行离散哈特莱变换,以此减小传输信号之间的相关性,达到抑制系统峰均比的目的。仿真结果表明,嵌入边带信息的SLM-DHT联合算法不仅提高了系统频带的利用率,而且明显抑制了系统的峰均比,达到了预期的效果。In order to suppress the high peak-to-average ratio in the asymmetric clipped optical orthogonal frequency division multiplexing(ACO-OFDM)system,a peak-to-average ratio suppression algorithm combining selection mapping(SLM)and discrete Hartley transform(DHT)was proposed.Firstly,according to the relationship between the phase factor used and the odd and even subcarriers in SLM algorithm,the phase of the transmitted data is changed to embed the sideband information,which realizes that the sideband information is hiding.Then the discrete Hartley transform is applied to the transmitted signals selected by SLM algorithm to reduce the correlation between the transmitted signals,so as to achieve the purpose of suppressing the peakto-average ratio of the system.Simulation results show that the SLM-DHT combined algorithm with embedded sideband information not only improves the utilization rate of the system frequency band,but also significantly suppresses the peak-to-average ratio of the system,achieving the expected effect.

关 键 词：峰均比 SLM DHT 边带信息 

分 类 号：TN919.3[电子电信—通信与信息系统]