OFDM系统降低峰均比的研究  

Study on Reducing the PAPR of OFDM Systems

作　　者：詹艳艳[1] 

机构地区：[1]沈阳理工大学信息科学与工程学院,辽宁沈阳110159

出　　处：《沈阳理工大学学报》2011年第5期6-10,共5页Journal of Shenyang Ligong University

摘　　要：OFDM技术属于多载波调制技术,其传输速率高,对码间干扰和信道选择性衰落具有很强的抵抗能力等特点,因此对OFDM技术的研究具有很高的理论价值与实用价值。但OFDM技术也有其不可忽视的缺点即PAPR值比较高。对限幅滤波和选择性映射方法降低峰均比进行研究,通过对两种方法的组合改进形成新的降低峰均比的算法,在不破坏系统整体性能的基础上有效地降低OFDM系统的峰均比.Orthogonal Frequency Division Multiplexing （OFDM） technology is multi -carrier modulation technique, the transmission rate is high, inter-symbol interference and selective fading channel has a strong resistance and other characteristics, so the technique of OFDM has a high theoretical value and practical value. However, OFDM technology also has its disadvantages which can not be ignored. The peak average power ratio is higher. In this paper, by researching on clipping and filtering method and selective mapping method to reduce PAPR, through a combination of two methods to improve the formation of a new PAPR reduction algorithms, without additional damage to the overall system performance, the OFDM system＇s PAPR is effectively reduced.

关 键 词：正交频分复用技术 峰值平均功率比 限幅滤波技术 选择性映射技术 

分 类 号：TN919.1[电子电信—通信与信息系统]