实现不等错误保护的最小功率AM-MIMO算法  

Minimum-Power AM-MIMO Algorithm to Realize Unequal Error Protection

作　　者：张艳玲[1] 孙献璞[1] 李建东[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室,陕西西安710071

出　　处：《华南理工大学学报（自然科学版）》2008年第5期70-74,88,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家杰出青年科学基金资助项目(60725105);国家自然科学基金重大项目(60496316);国家自然科学基金资助项目(60572146);高等学校学科创新引智计划项目(B08038)

摘　　要：为了提高无线通信中多媒体数据的传输质量,提出了在MIMO系统中通过自适应调制实现数据不等错误保护传输的算法.在窄带平衰落信道环境下,空间相关MIMO系统中各个子信道的功率增益差异较大,利用这个特点将MIMO子信道分为两组,分别传输高质量和低质量的数据.根据输入数据的传输质量和传输速率要求,自适应调整各个子信道的发射功率和调制阶数,使得系统消耗的总功率最小.仿真结果表明,该算法能够在最小发射功率的约束条件下,有效控制数据传输的误比特率,实现不等错误保护.In order to improve the transmission quality of multimedia data in wireless communication,this paper proposes an adaptive modulation algorithm to realize the unequal error protection（UEP） for the data transmission in multiple-input multiple-output（MIMO） system.As the power gains of sub-channels of the spatial correlation MIMO system are greatly different in narrowband flat fading environment,the sub-channels are divided into two groups to transmit high-and low-quality data,respectively.Moreover,according to the demands of transmission quality and rate of input data,the modulation order and transmission power of each sub-channel are adaptively adjusted to minimize the total transmission power.Simulated results indicate that the proposed algorithm can effectively control the bit error rate of data and realize the unequal error protection with a minimum transmission power.

关 键 词：多输入多输出系统 自适应调制 不等错误保护 最小发射功率 

分 类 号：TN911.3[电子电信—通信与信息系统]