MIMO-OFDM系统中基于效用函数的跨层资源分配算法  

A Cross-Layer Resource Allocation Algorithm in MIMO-OFDM System Based on Utility Function

作　　者：张皓[1] 惠毅[1] 周志杰[1] 赵陆文[1] 郑翔[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《信号处理》2009年第9期1399-1404,共6页Journal of Signal Processing

摘　　要：针对多业务MIMO-OFDM系统的下行链路提出了一种基于效用函数的跨层资源分配算法。建立了以效用函数最大化为目的的跨层优化目标,分别设计了语音、流媒体和"尽力而为"三种业务的边界效用函数。算法首先在所有用户中分配子载波,然后进行单用户和空间子信道的功率、比特分配,并对比特数目进行取整处理。仿真结果表明算法满足了多种业务的QoS要求,对时延敏感的业务能提供更小的时延,同时对"尽力而为"业务提供了更高的吞吐量。A cross-layer resource allocation algorithm based on utility function is proposed for the downlink of integrated services MIMO-OFDM system. The optimization object which maximizes the utility function is built and three boundary utility functions for voice, stream media and best-effort services are given out. The algorithm first allocates subcarriers among all users, and then allocates power and bits for each user and their space sub-channels. At last it makes the number of bits integer. Simulation results show that the algorithm can satisfy integrated services＇ QoS,provide smaller delay for the delay-sensitive services, and maintain high throughput for the best-effort services.

关 键 词：多输入多输出 正交频分复用 跨层 资源分配 

分 类 号：TN911.3[电子电信—通信与信息系统]