多载波系统中一种高效自适应比特功率分配算法  

Efficient Adaptive Bit and Power Allocation Algorithm in Multi-carrier System

作　　者：霍永青[1] 彭启琮[1] 

机构地区：[1]电子科技大学通信学院140教研室

出　　处：《电子测量与仪器学报》2007年第6期10-13,共4页Journal of Electronic Measurement and Instrumentation

基　　金：自然科学基金重大资助项目(编号:60496313)

摘　　要：本文提出了一种多载波系统中自适应比特和功率分配算法,该算法在给定功率和目标误码率的条件下最大化系统容量。算法给出了比特和功率分配的闭合表达式,仿真结果表明文中所提算法的计算复杂度要比Krongold算法的复杂度低,相同信道条件下可实现的容量要比Krongold算法可实现的容量高,故,所提算法要优于Krongold算法。文中还对多载波系统中比特功率分配的经典算法进行了归纳介绍。In this paper, a bit and power allocation algorithm is presented to maximize the system capacity subject to the total power and the target bit error rate （BER） constraints. The closed form expressions of bit and power allocation are derived. The algorithm features very low computational complexity, simulation results show that the computational complexity of the proposed algorithm is lower than that of the Krongold＇s algorithm. Moreover, the algorithm can achieve larger capacity than the Krongold＇s algorithm under the same channel state. So, the proposed algorithm is better than the Krongold＇s algorithm. The classical bit and power allocation algorithms are also summarized in the paper.

关 键 词：多载波 自适应 比特功率分配 容量 

分 类 号：TN92[电子电信—通信与信息系统]