一种新的MIMO-OFDM自适应比特功率分配方案研究  

A New MIMO-OFDM System Based Adaptive Bit Power Allocation Algorithm

作　　者：王丽[1] 

机构地区：[1]齐齐哈尔大学计算中心,黑龙江齐齐哈尔161006

出　　处：《通信技术》2009年第5期65-67,共3页Communications Technology

摘　　要：针对MIMO-OFDM系统的自适应调制问题,在完全已知信道状态和满足固定速率以及给定的误比特率的约束下以最小化发射功率为目的,文中提出了一种低复杂度的自适应方案。该方案将对Chow算法和Campello算法进行功率分配和步长加载的改进。仿真结果表明,该算法在降低复杂度的同时提高了系统的性能。In this paper, an adaptive modulation scheme is proposed in order to minimize the total transmission power under given BER and satisfy the fixed transmission rate in MIMO-OFDM systems. For this purpose, and adaptive scheme with low complexity is described, and the modifications on power allocation and step-size load of Chaw and Levin Campello algorithms are implemented. The simulation results show that, by the modified algorithm, the MIMO-OFDM system is improved in performance while is reduced in complexity.

关 键 词：多输入输出正交频分复用 自适应调制 比特和功率分配 

分 类 号：TN92[电子电信—通信与信息系统] TN911[电子电信—信息与通信工程]