CAJ | 학술논문

正交频分复用(OFDM)技术作为移动通信的核心技术之一,被广泛用于各种通信系统,但其具有很高的峰值平均功率比(PAPR),会导致OFDM信号超过放大器的线性放大范围,从而恶化系统性能.文章研究了一种在降低PAPR的部分传输序列(PTS)方法基础之上的低复杂度方法,对PTS方法中候选序列的产生降低了复杂度,同时加入了复杂度较低的压扩方法.仿真结果表明,该方法在降低复杂度的同时也具有比传统PTS更好的降低PAPR的能力.
정교빈분복용(OFDM)기술작위이동통신적핵심기술지일,피엄범용우각충통신계통,단기구유흔고적봉치평균공솔비(PAPR),회도치OFDM신호초과방대기적선성방대범위,종이악화계통성능.문장연구료일충재강저PAPR적부분전수서렬(PTS)방법기출지상적저복잡도방법,대PTS방법중후선서렬적산생강저료복잡도,동시가입료복잡도교저적압확방법.방진결과표명,해방법재강저복잡도적동시야구유비전통PTS경호적강저PAPR적능력.
OFMD has higher peak average power ratio (PAPR), which will cause the OFDM signal surpass the linear amplification scope of amplifier and deteriorate system performance. In this paper, we propose a new PAPR reduction method based on low complexity PTS for OFDM system. This method simplifies the process of generating candidate se-quences in conventional PTS, while adding the method of low complexity companding transform. Simulation shows that the method we proposed not only has low complexity but also has better perfor-mance in reducing PAPR than that of conventional PTS.