平均速率受限条件下OFDM系统联合自适应分配策略  

Margin adaptive allocation algorithm with average data rate constraint in multiuser OFDM systems

作　　者：曲君国[1] 徐友云[1] 蔡跃明 

机构地区：[1]解放军理工大学通信工程学院

出　　处：《解放军理工大学学报（自然科学版）》2006年第4期307-311,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60372080);江苏省自然科学基金资助项目(BK2004014)

摘　　要：提出一种满足不同用户速率要求的OFDM系统的联合子载波、比特和功率分配算法,以达到进一步减小发射功率的目的。首先在用户平均速率受限的条件下进行子载波分配,然后对分给每个用户的子载波进行速率注水,进行比特和功率分配,使系统在满足用户传输速率要求的同时传输功率最小。仿真结果表明,该算法功率分配部分具有较低的复杂度,相同性能要求下所需最小传输功率比其他算法小。A novel margin adaptive resource allocation algorithm was proposed for multiuser OFDM systems to reduce the total transmit power. In the algorithm the following two steps were considered. In the first step, subcarriers were assigned with the average data rate constraint, and in the second, power and bits were distributed to the subcarriers which was assigned in the first step based on the waterfilling theory. Computer simulations show that the proposed algorithm has low calculating complex and the total transmit power is smaller than the existing algorithm.

关 键 词：正交频分复用 功率自适应分配策略 平均速率受限 注水方法 

分 类 号：TN929.5[电子电信—通信与信息系统] E964[电子电信—信息与通信工程]