降低功率控制下正交频分复用系统的峰均比  

Reducing Peak-to-Average Power Ratio for Orthogonal Frequency Division Multiplexing Systems under Low Power Control

作　　者：武林俊[1] 朱世华[1] 冯兴乐[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2005年第8期859-862,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(60072040);国家高技术研究发展计划资助项目(2001AA123041);教育部高等学校博士学科点专项科研基金资助项目(20020698024;20030698027).

摘　　要：为了降低功率控制条件下正交频分复用系统的峰值功率与均值功率之比(峰均比),提出了基于数据块功率平衡准则的部分传输序列技术,即把子载波信号分割成V个数据块,按照功率平衡准则,每个数据块具有相同的信号功率,不同数据块所包含的子信道数不同.再采用旋转矩阵来减小数据块之间的相关性以便减小系统的峰均比值.与传统的均匀分割数据信号法相比,采用这种技术时,系统的峰均比值减小了0.8～2 dB.A partial transmit sequence scheme based on the power-balance principle is proposed in order to reduce the peak-to-average power ratio （PAR） in low power control orthogonal frequency division multiplexing systems. According to the power-balance principle, multi-carrier signals are partitioned into V signal blocks, where every block has the same power but the number of sub-carriers within a block is different from each other. The relativity of V blocks is reduced by introducing circumrotate matrix into the V blocks. By this way, the PAR can be reduced by 0. 8-2 dB compared with the original equal scheme where each block has the same number of sub-carriers.

关 键 词：功率控制 正交频分复用 峰均比 部分传输序列 

分 类 号：TN914.4[电子电信—通信与信息系统]