论文部分内容阅读
提出一种新的室内可见光非直流偏置正交频分(Non-DC-Biased Orthogonal Frequency Division Multiplexing,NDC-OFDM)复用系统,该系统采用多个颜色LEDs作为光源,在保证高传输可靠性的同时可以维持环境光的稳定。将空间调制和同色异谱调制结合并应用到室内可见光OFDM通信系统中得到一种新的适用于室内可见光通信系统的NDC-OFDM传输方案,该方案具有OFDM、空间调制和同色异谱调制的优势,适用于高速室内白光通信系统。仿真结果表明所提出的NDC-OFDM室内可见光传输系统与传统的直流偏置光OFDM(DC-biased Optical OFDM)和非对称限幅光OFDM(Asymmetrically Clipped Optical OFDM)相比具有更好的优势,并且与其它NDC-OFDM室内可见光传输方案相比,对于OFDM信号高峰均功率比引起的光信号非线性畸变问题,本文提出的多色LEDs NDC-OFDM室内可见光传输方案除了具有更好的鲁棒性外,还不会产生光强度波动。
A new indoor non-DC-Biased Orthogonal Frequency Division Multiplexing (OFDM-OFDM) multiplexing system is proposed. The system uses multiple color LEDs as the light source, and ensures high transmission reliability While maintaining the stability of the ambient light. Combining spatial modulation and metamerism modulation and applied to the indoor visible OFDM communication system, a new NDC-OFDM transmission scheme for indoor visible light communication system is proposed, which has the advantages of OFDM, spatial modulation and metamerising , Suitable for high-speed indoor white light communication system. The simulation results show that the proposed NDC-OFDM indoor visible light transmission system has better advantages than the traditional DC-biased Optical OFDM and Asymmetric Clipped Optical OFDM, and Compared with other NDC-OFDM indoor visible light transmission schemes, the multi-color LEDs NDC-OFDM indoor visible light transmission scheme proposed in this paper has better robustness than the other NDC-OFDM indoor visible light transmission schemes. , Will not produce light intensity fluctuations.