基于离散正弦变换的单载波频分多址系统及其性能分析

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-FDMA系统的结构框图，接着重点推导和分析了DST IFDMA和DST LFDMA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。

A single carrier frequency division multiplex access system based on discret sine transform and its performance analysis

To analyze the influence of Discrete Fourier Transform(DFT) and Discrete Sine Transform(DST) on the performance of a Single Carrier 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 domain 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 conventional 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 signals and lower than that of OFDMA.