Upper and lower bounds on PMEPR in OFDM systems and application  

作　　者：YanBiao XuZongze 

机构地区：[1]CollegeofInformationEngineering,Yangzhouuniversity,Yangzhou225009,P.R.China [2]CollegeofInformationScienceandTechnology,NanjingUniversityofAeronautics&Astronautics,Nanjing210016,P.R.China

出　　处：《Journal of Systems Engineering and Electronics》2004年第4期476-478,共3页系统工程与电子技术（英文版）

摘　　要：Upper and lower bounds on peak-to-mean envelope power ratio (PMEPR) in OFDM systems are derived in this paper. The derivation results show that the upper bound on PMEPR only depends on the aperiodic autocorrdation functions of the data sequences and is quite useful for rapid elimination of sequences that have PMEPR exceeding a given threshold. According to the lower bound on PMEPR,it has a great change as N (number of subcarriers) varies only for a very small N. For a 16-subcarrier BPSK-OFDM system, a selective mapping (SLM) way to reduce PMEPR is investigated with the upper bound on PMEPR and the distribution of PMEPR for all possible message sequences is given. The analytic results show that the maximal PMEPR is about 6.5 dB which is 5.5 dB less than that in worst situation.

关 键 词：PMEPR OFDM 副载波 自相关函数 平均峰值包络功率 无线通信 

分 类 号：TN92[电子电信—通信与信息系统]