介绍了一种新颖的OFDM信号峰均比降低技术,不仅削去峰值信号,也削去谷值信号,从而最大程度上降低了信号的峰均比。矢量孔技术可以同时调整信号幅度和相位,使得信号矢量回避零点,信号谷值由此被削去。为了限制峰均比降低技术带来的带内和带外失真,该方法还进一步结合了闲置载波技术。仿真结果表明,经过该方法对QPSK调制的OFDM信号进行降低峰均比处理之后,信号峰均比从10.61dB降低到了7.03dB,EVM值保持为4.93%。该方法可以大幅度提高OFDM通信系统中功率放大器的效率和线性度。 A novel OFDM PAPR reduction technique is introduced, which not only shaves the peak signal but also cuts the valley signal to minimize the peak-to-average ratio of the signal. Vector hole technology can simultaneously adjust the signal amplitude and phase, making the signal vector to avoid zero, the signal valley thus be cut off. In order to limit the in-band and out-of-band distortion brought by PAPR reduction, this method further combines the idle carrier technology. The simulation results show that after this method, the peak-to-average ratio of QPSK-modulated OFDM signals decreases from 10.61dB to 7.03dB, and the EVM value remains at 4.93%. This method can greatly improve the efficiency and linearity of the power amplifier in OFDM communication system.