现代电子技术2017，Vol.40Issue(16)：32-34,3.DOI:10.16652/j.issn.1004-373x.2017.16.009
可见光通信中的OFDM技术的改进与仿真
Improvement and simulation of OFDM technology in visible light communication
摘要
Abstract
The traditional visible light communication OFDM (orthogonal frequency division multiplexing) technology (PAM -DMT) which does not need to add DC has low utilization ratio of subcarriers and is greatly affected by noise interference.The PDO-OFDM modulation-demodulation method fusing PAM-DMT and DCO-OFDM signals is proposed and improved.The DCO-OFDM signal is fused into the PAM-DMT system to improve the communication rate by making full use of the subcarrier resources.The three parameters of PDO-OFDM are rationally set up to improve the decoding performance of the system.The receiving end of the system is improved with frequency diversity combining method.The subtraction operation is performed directly in the frequency domain according to the linear features of Fourier transform to obtain the numerical value of pure PAM-DMT signal in subcarrier real part.The PAM-DMT is used to modify the receiver for demodulation and enhance the decoding performance of the system.The simulation results show that the proposed method can improve the adjustment performance of the system obviously by optimizing the bit error rate of the visible communication.关键词
可见光通信/OFDM技术/技术改进/调制解调Key words
visible light communication/OFDM technology/technological improvement/modulation-demodulation分类
信息技术与安全科学引用本文复制引用
鲍晶晶,董华锋..可见光通信中的OFDM技术的改进与仿真[J].现代电子技术,2017,40(16):32-34,3.基金项目
国家自然科学基金(11604056) （11604056）
东莞职业技术学院政校行企合作开展科研与服务项目(政201610) （政201610）
广东省高等职业教育品牌专业建设项目(520901) （520901）
