跳频OFDM低压电力线通信网络优化算法研究  

Research of optimization algorithm for hopping OFDM low voltage power network

作　　者：王彦[1,2] 王超[1] 刘宏立[2] 

机构地区：[1]南华大学电气工程学院,湖南衡阳421001 [2]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电子技术应用》2015年第5期94-97,共4页Application of Electronic Technique

摘　　要：提出一种优化跳频OFDM通信网络性能的新方法,在考虑传输节点位置及空间分布的情况下,分析物理干扰信道下传输中断率的闭式解,并用其表征跳频OFDM低压电力线载波通信网络的传输能力;以中断概率作为系统目标函数,采用穷举搜索和梯度搜索算法联合优化跳频信道数、OFDM调制指数和差错控制编码速率,旨在寻找跳频信道数、调制指数和差错控制编码速率的最佳组合,使得网络传输性能最优。This paper propose a novel algorithm for optimizing the performance of frequency hopping OFDM communication network. By taking the location and special distribution of the transmission nodes into consideration, it analyzes the closed-form so- lution of the transmission interrupt probability of the physical interference channel. Furthermore, it use the closed-form solution to characterize the transmission capability of the frequency hopping low voltage power line carrier communication network. In order to optimize the transmission performance, it takes the interrupt probability as the system objective function, and integrates the exhaus- tive search and the gradient search strategies to optimize the number of the frequency hopping channels, the OFDM modulation in- dex and the error control coding rate, which aims at finding out their optimal combination.

关 键 词：电力线载波通信 跳频 正交频分复用 梯度搜索 

分 类 号：TN914[电子电信—通信与信息系统]