单周动态补偿的光通信码间抑制抗干扰新方法  

Dynamic Compensation in a Single Week,a New Method of Optical Communication Between Code Inhibition of Anti-Interference

作　　者：蔡文龙[1] 

机构地区：[1]北华航天工业学院电子工程系,河北廊坊065000

出　　处：《计算机仿真》2015年第7期198-202,共5页Computer Simulation

摘　　要：在可见光通信中由于多径信道重组产生空间聚焦,引起码间干扰导致信道失衡,需要进行码间抗干扰抑制。传统方法采用正交频分复用方法进行LED失真抑制时,由于载波幅值出现负信号失真,无法实现单周动态补偿,效果不佳。提出一种单周动态补偿的光通信码间抑制抗干扰新方法。采用BPSK调制码元分布构建可见光通信的多径信道模型,计算频谱能量,把输入的比特流进行串并转换和调制,产生谐波单周增益,对通信信号进行OFDM分解,完成信号和翻转负信号的时域采样,进而实现LED非线性单周控制动态补偿,并将信号以光功率的形式发射到光无线通信信道,通过动态补偿样本选择加权系数,完成码间抗干扰抑制。仿真结果表明,上述方法能有效地重组多径信号,拟制码间杂波干扰,空间增益聚焦特性较好,误比特率有很大降低,为光通信优化设计提供了参考。In the visible light communication due to multipath channel space focus on restructuring,lead at least lead to channel imbalance between interference,intersymbol interference resistance is required. The traditional method using orthogonal frequency division multiplexing method LED distortion inhibition,due to the negative signal carrier wave amplitude distortion,unable to realize dynamic compensation in a single week,the effect not beautiful.Based on a dynamic compensation in a single week,a new method of optical communication between code inhibition of anti-jamming. Using BPSK modulation code element distribution of the multipath channel models of the visible light communication,spectrum energy calculation,the input string of bitstream and transition and modulation,single Zhou Zengyi,harmonics for OFDM signal decomposition,complete time domain sampling signals and turn negative,achieving LED nonlinear control dynamic compensation in a single week,and will be in the form of light power signal to optical wireless communication channel,through dynamic compensation weighted coefficient of sample selection,to complete the intersymbol interference resistance. Simulation experiments show that this method can effectively restructure multipath signal,the artificial yards markings wave interference,the spatial gain better focus features,has a lot to reduce the bit error rate.

关 键 词：光通信 码间干扰 失真 

分 类 号：TN929.1[电子电信—通信与信息系统]