基于OFDM的多色可见光通信联合子信道与功率资源分配优化算法

OFDM-based Optimization Algorithm for Joint Sub-channel and Power Resource Allocation for Multi-color Visible Light Communication

摘要:

设计了一种联合功率与子信道的资源分配算法,该算法用于正交频分复用(OFDM)的多色可见光通信(VLC)系统。相比于传统的单色光通信,文章所设计的算法可用于多种可见光,包括红、绿、蓝等多种可见光的OFDM信号传输。该资源分配算法目的在于最大化可见光传输网络的传输速率,首先对三种不同的可见光进行子信道的优化分配,得到该优化值后对其进行功率分配,以达到最终的目标优化值。仿真结果表明,相比于固定的资源分配算法,该算法可以取得更高的传输速率。

Abstract:

A joint power and sub-channel resource allocation algorithm was designed for orthogonal frequency division multiplexing (OFDM) based multi-colour visible light communication (VLC) systems. Compared to the conventional monochromatic optical communication system, this algorithm could be used for OFDM signal transmission of multiple visible lights including red, green and blue. The proposed algorithm aimed to maximize the transmission rate of the visible light transmission network. The optimally allocation of sub-channels was first performed for three different visible lights. After obtaining this optimized sub-channel value, the power was allocatied to it in order to achieve the final target optimized value. Simulation results show that the algorithm can achieve higher transmission rate than fixed resource allocation algorithms.