文章基本信息

标题：GENERALIZED DISCRETE FOURIER TRANSFORM BASED IMPROVEMENT OF PARTIAL TRANSMIT SEQUENCE SCHEME TO REDUCE PAPR IN OFDM SYSTEMS
本地全文：下载
作者：AHMED M. ELSHIRKASI ; MOHAMMAD UMAR SIDDIQI ; MOHAMED HADI HABAEBI 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2015
卷号：76
期号：1
出版社：Journal of Theoretical and Applied
摘要：Future applications of communication systems require higher data rates and more mobility. Orthogonal frequency division multiplexing (OFDM) can achieve these goals due to it is ability to reach high bit rates over fading channels as well as its efficient utilization of the bandwidth. However, the transmitted signal of OFDM suffers from high peak to average power ratio (PAPR). Such signals require high power amplifier (HPA) of large dynamic range to amplify the whole transmitted signal without distorting it. This paper gives the results of a study on the effect of applying the nonlinear phase of generalized discrete Fourier transform (GDFT) theory on the performance of partial transmit sequence (PTS) which is one of proposed techniques to mitigate high PAPR of OFDM signal. This has been done by modifying the phase of data symbols in each OFDM block before PTS is applied. Simulation results show that the proposed scheme requires half the number of sub-blocks to achieve the same amount of PAPR reduction compared with the original PTS scheme.
关键词：Generalized Discrete Fourier Transform; OFDM; PAPR; CCDF; PTS