基于电力线信道作用的能量时频分布及其能量分配  

Energy Time Frequency Distribution Based on Power Line Channel Effect and Its Application in Energy Assignment

作　　者：徐志强[1] 翟明岳[1] 赵宇明[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京市102206 [2]清华大学深圳研究生院能源与电工研究所,广东省深圳市518055

出　　处：《电力系统自动化》2009年第1期75-80,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(60402004);教育部重点资助项目(105050)~~

摘　　要：对于已有的时变性和频选性电力线信道作用模型的描述,都没有考虑其能量时频谱联合分布。文中把电力线信道作用的能量时频分布分为乘性和加性作用;采用3种时频谱方法分析和比较了其能量时频谱分布情况,仿真了在平滑伪Wigner-Ville分布(SPWVD)下每个子载波内开关时隙数及每个时隙内开关子载波数。按约束条件的不同分别介绍了平均、贪婪和地窖能量分配算法,仿真分析了这些算法在信道作用和待分配信息能量已知条件下的时频能量分配,结果表明,平均算法的复杂度最低,地窖算法能量损失最小。In no description of power line channel models with time varying and frequency selecting characteristics available has any account been taken of the channel effect of energy time frequency distribution （ETFD）. The classification of power line channel effects into the multiplicative and additive ETFD is proposed, which compares their differences by using three time frequency analytical methods and simulates the available slot number in every sub-carrier or the available sub-carrier number in every slot using smooth pseudo Wigner-Ville distribution （WVD）. The three energy assignment methods of average or greed or cellar are also recommended, which simulates their energy time frequency assignments in the given channel effect and attainable total energy. The results obtained show that the average algorithm has the lowest operational complexity and the cellar algorithm the lowest energv loss values.

关 键 词：电力线通信 信道作用 时频分析 能量分配 

分 类 号：TM73[电气工程—电力系统及自动化]