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| 一种基于电力线通信的OFDM自适应比特与功率分配算法 | |
| 引用本文： | 李姣军,曾孝平,张众发.一种基于电力线通信的OFDM自适应比特与功率分配算法[J].太赫兹科学与电子信息学报,2007,5(1):15-21. |
| 作者姓名： | 李姣军 曾孝平 张众发 |
| 作者单位： | 1. 重庆工学院,电子信息与自动化系,重庆,400050;重庆大学,通信工程学院,重庆,400044 2. 重庆大学,通信工程学院,重庆,400044 3. 广东电网云浮供电局,广东,云浮,527300 |
| 基金项目： | 重庆市教委应用研究课题 |
| 摘 要： | 针对室内电力线信道的基本特性建立了基本的信道模型,并研究了一种功率最小化自适应正交频分复用(Orthogonal Frequency-Division Multiplexing,OFDM)算法,在给定比特率和误码率(Bit Error Rate,BER)的情况下,使发射功率最小。通过仿真结果表明,在每个子信道的平均调制比特数不高(<4)的情况下,功率最小化算法的误码率性能明显好于固定调制。 |
| 关 键 词： | 电力线通信 正交频分复用 比特与功率分配算法 模型 |
| 文章编号： | 1672-2892(2007)01-0015-07 |
| 修稿时间： | 2006-10-13 |
An Adaptive Bit Loading and Power Allocation Algorithm in OFDM System for Powerline Communication |
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| LI Jiao-jun,ZENG Xiao-ping,ZHANG Zhong-fa.An Adaptive Bit Loading and Power Allocation Algorithm in OFDM System for Powerline Communication[J].Journal of Terahertz Science and Electronic Information Technology,2007,5(1):15-21. | |
| Authors: | LI Jiao-jun ZENG Xiao-ping ZHANG Zhong-fa |
| Affiliation: | 1.Department of Electronic Information and Automation, Chongqing Institute of Technology, Chongqing 400050, China; 2.CollegeofCommunieationEngineering, ChongqingUniversity, Chongqing400044, China; 3.Yunfu Power Supply Bureau, Guangdong Power Grid Cooperation, Yunfu Guangdong 527300, China |
| Abstract: | The basic features of indoor powerline channel are presented in this paper,as well as relevant model.Based on the model,this paper also proposes an adaptive Orthogonal Frequency-Division Multiplexing(OFDM) algorithm which minimizes total transmission power for a given bit rate under a given Bit Error Rate(BER).The simulation result shows,when the mean number of bits per subchannel is less than 4,the BER performance of power minimization algorithm is greatly better than that of fix-bit modulation. |
| Keywords: | powerline communication OFDM bit loading and power allocation model |
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