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改进降低OFDM系统PAPR的DSI方法
引用本文:刘江宁.改进降低OFDM系统PAPR的DSI方法[J].贵州大学学报(自然科学版),2012,29(5):98-100.
作者姓名:刘江宁
作者单位:大连航运职业技术学院 航海系,辽宁 大连,116000
基金项目:基金项目:国家自然科学基金资助项目(90607012)
摘    要:作为第四代移动通信系统的核心技术,正交频分复用(OFDM)技术已成为当今高速无线通信领域的研究热点。但是OFDM调制中存在的高峰均功率比(PAPR),为其实用化设置了障碍。本文对现有的降低PAPR的虚序列方法(DSI)提出了两种改进方式,就是在减小OFDM系统复杂性的前提下,对此系统发射端的信号进行处理,保证输入到IFFT处理器中的数据序列相关性为0,从而降低OFDM信号的高峰均功率比。

关 键 词:正交频分复用  峰值平均功率比  虚序列插入  改进

The Improved DSI Method of Reducing High PAPR in the OFDM System
LIU Jiang-ning.The Improved DSI Method of Reducing High PAPR in the OFDM System[J].Journal of Guizhou University(Natural Science),2012,29(5):98-100.
Authors:LIU Jiang-ning
Institution:LIU Jiang-ning ( Department of Navigation, Dalian Shipping Career Technical College, Dalian 116000, China)
Abstract:As the nuclear technique of the fourth-class mobile communications, the Orthogonal Frequency Division Multiplexing (OFDM) technique becomes the researching hotspot of the rapid wireless communication domain, But Peak-to-average Power Ratio (PAPR) existing in OFDM hinders its application. This paper proposes two improved Dummy sequence insertion (DSI) methods for reducing PAPR. On the condition of reducing com- plexity of the OFDM system, we reduce the OFDM signal's PAPR. The OFDM signal of transmitter is trans- formed, which assures the correlation of data sequences that enter IFFT is 0, accordingly the OFDM signal's PAPR is reduced.
Keywords:orthogonal frequency division multiplexing  peak-to-average power ratio  dummy sequence inser-tion  amelioration
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