基于OFDMA的多小区协作可见光通信系统二维功率分配算法  

Two-dimensional power allocation algorithm for multi-cell coordinated visible light communication system based on OFDMA

作　　者：潘超 郭心悦[1] PAN Chao;GUO Xinyue*(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光通信技术》2023年第5期6-11,共6页Optical Communication Technology

基　　金：国家重点研发计划(批准号:2018YFB1801503)资助。

摘　　要：为了消除可见光通信系统中多小区和多用户信号干扰,提出一种基于正交频分多址(OFDMA)的多小区协作可见光通信系统二维功率分配算法。首先,根据信道情况,采用OFDMA多小区协作资源分配算法给信道情况差的用户分配更高的功率;然后,根据信道信息求解共照区域用户多个协作发光二极管(LED)的发送功率比,得到最优的目标叠加星座。仿真结果表明:与平均功率分配算法相比,一维功率分配算法误码率性能平均提升了16%;与一维功率分配算法相比,二维功率分配算法误码率性能平均提升了10%。In order to eliminate interference from multi-cell and multi-user signals in visible light communication systems,a two-dimensional power allocation algorithm based on orthogonal frequency division multiple access(OFDMA)for multi-cell collaborative visible light communication systems is proposed.Firstly,based on the channel situation,an OFDMA multi-cell collaborative resource allocation algorithm is adopted to allocate higher power to users with poor channel conditions.Then,based on the channel information,the transmission power ratio of multiple cooperative light emitting diode(LED)in the shared illumination area is calculated to obtain the optimal target superposition constellation.The simulation results show that compared with the average power allocation algorithm,the bit-error rate of one-dimensional power allocation algorithm is improved by 16%on average.Compared with the one-dimensional power allocation algorithm,the bit-error rate of the two-dimensional power allocation algorithm is improved by 10%on average.

关 键 词：可见光通信 协作资源分配 功率分配 多小区 多用户 正交频分多址 

分 类 号：TN929.12[电子电信—通信与信息系统]