基于离散正弦变换的单载波频分多址系统及其性能分析  

A Single Carrier Frequency Division Multiplex Access System Based on Discret Sine Transform and its Performance Analysis

作　　者：周瑜[1] 庄陵[1] 邵凯[1] 王光宇[1] 

机构地区：[1]重庆邮电大学,重庆400065

出　　处：《电讯技术》2013年第4期456-461,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(61071195);中芬国际合作项目(1028)~~

摘　　要：为分析离散傅里叶变换(DFT)与离散正弦变换(DST)对单载波频分多址(SC-FDMA)系统某些性能的影响,提出了一种基于离散正弦变换的单载波频分多址系统。给出了基于DST的SC-FD-MA系统的结构框图,接着重点推导和分析了DST IFDMA和DSTLFDMA信号的时域表达式,最后讨论了系统的峰值平均功率比(PAPR)和不同脉冲成形滤波器的冲激响应。仿真结果表明,基于DST的SC-FDMA系统比传统的基于DFT的SC-FDMA系统和正交频分多址接入(OFDMA)系统有更好的比特误码率。此外,DST SC-FDMA信号的PAPR性能接近于DFT SC-FDMA且优于OFDMA。To analyze the influence of Discrete Fourier Transform（DFT） and Discrete Sine Transform（DST） on the performance of a Single Cartier Frequency Division Multiple Access（SC-FDMA） system, a DST-based SC- FDMA system is introduced. The structure of SC-FDMA system based on DST is described. Then, the time do- main expressions of the DST IFDMA signal and DST LFDMA signal are derived and analyzed. Finally, the Peak-to-Average Power Ratio（PAPR） and impulse response of different pulse shaping filter are discussed. The simulation results show that the proposed DST SC-FDMA system has a better bit performance than the conven- tional DfT SC-FDMA and Orthogonal Frequency Division Multiple Access（OFDMA） system. Furthermore, the PAPR of DST SC-FDMA signals is closed to that of DFT SC-FDMA sisals and lower than that of OFDMA.

关 键 词：离散正弦变换 单载波频分多址 正交频分多址 峰值平均功率比 

分 类 号：TN911[电子电信—通信与信息系统]