CAJ | 학술논문

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.
위분석리산부리협변환(DFT)여리산정현변환(DST)대단재파빈분다지(SC-FDMA)계통모사성능적영향,제출료일충기우리산정현변환적단재파빈분다지계통.급출료기우DST적SC-FD-MA계통적결구광도,접착중점추도화분석료DST IFDMA화DST LFDMA신호적시역표체식,최후토론료계통적봉치평균공솔비( PAPR)화불동맥충성형려파기적충격향응.방진결과표명,기우DST적SC-FDMA계통비전통적기우DFT적SC-FDMA계통화정교빈분다지접입(OFDMA)계통유경호적비특오마솔.차외,DST SC-FDMA신호적PAPR성능접근우DFT SC-FDMA차우우OFDMA.
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 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 signals and lower than that of OFDMA.