【摘要】 比较了不同正交幅度调制方式下单载波频分多址接入(SC-FDMA,Single Carrier FrequencyDivision Multiple Access)和正交频分多址接入(OFDMA,Orthogonal Frequency Division MultipleAccess)2种多址接入技术的峰均功率比(PAPR,Peak-to-Average Power Ratio),得出相比较OFDMA而言,SC-FDMA具有较低的PAPR,但是受调制方式影响较大。接着讨论了限幅后信号的PAPR对误差向量幅度的影响,给出了LTE上行系统选择模拟器件模数转换器/数模转换器(ADC/DAC)的指导参数。更多还原

【Abstract】 The comparison of the PAPR between SC-FDMA and OFDMA by different modulation modes indicates the conclusion that SC-FDMA has a comparatively low PAPR/CM but is sensitive to the modulation modes.Then the impact of PAPR to error vector magnitude,where Clipping is applied to reduce PAPR,is discussed,and thus some guidance parameters in choosing the ADC/DAC for the uplink of LTE system are also given.更多还原