论文部分内容阅读
PAR即信号峰值与平均值的比率 ,在 ADSL 系统中 ,由于采用 DMT调制 ,随机相位的正弦信号累加可能在某一位置使这些信号同相相加 ,产生幅度非常大的尖峰信号 ,因此 ADSL 系统 PAR值很高 ,PAR值高将给系统性能带来损害 ,本文研究 PAR消减问题 ,通过仿真得到有益的参数 ,为实际设计实现提供了参考。
PAR is the signal peak-to-average ratio. In ADSL systems, the addition of sinusoidal signals of random phase due to DMT modulation may add these signals in-phase at a certain position, resulting in spurious signals of very large amplitude. Therefore, the ADSL system PAR The value of PAR is very high and the value of PAR is very high, which will bring damages to the system performance. In this paper, we study the problem of PAR reduction and get useful parameters through simulation, which provides a reference for the actual design and implementation.