低复杂度的MIMO-OFDM系统峰均比降低算法  

Low-complexity PAPR reduction algorithm for MIMO-OFDM system

作　　者：黎锁平[1] 王克融[2] 巩朋成[2] 

机构地区：[1]兰州理工大学理学院,甘肃兰州730050 [2]兰州理工大学计算机与通信学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2010年第2期79-82,共4页Journal of Lanzhou University of Technology

基　　金：教育部"春晖计划"基金(Z2006-1-62006);甘肃省自然科学基金(0809RJZA019);甘肃省高校研究生导师科研基金(0703-10)

摘　　要：在证明和分析经过正交空时编码的信号与其共轭信号具有相同峰均比及正交空时编码结构具有共轭对称性的基础上,提出一种低复杂度的MIMO-OFDM系统峰均比降低算法.该算法只在第一个符号周期内采用迭代运算依照Minimum Maximum准则得到最优随机相位序列矢量,使得算法复杂度显著降低,提高了系统效率.仿真结果验证了该算法使迭代运算量大幅减少,同时还对峰均比降低效果有较小改善,从而提高系统的性能.On the basis of verification and analysis of the fact that the signal after orthogonal space-time encoding and its conjugate signal had the same PAPR,and the orthogonal space-time code structure had conjugate and symmetrical characteristics,a low-complexity PAPR reduction algorithm for MIMO-OFDM system was proposed.With this algorithm,the iterative operation was performed only in the first symbol cycle and then,according to minimum-maximum criterion,the optimal sequence of random phase vector was obtained.Therefore,computational complexity was reduced significantly and system efficiency improved,also.It was verified by simulation result that the proposed algorithm could significantly reduce the amount of iteration and improve PAPR reduction effect slightly at the same time.Thereby,this algorithm would improve the performance of the system.

关 键 词：多输入多输出 正交频分复用 正交空时编码 峰均功率比 

分 类 号：TN92[电子电信—通信与信息系统]