【摘要】 OFDM技术继CDMA技术之后,将成为无线宽带接入和4G移动通信的核心技术。然而,OFDM的峰均功率比较高是阻碍其发展和应用的难点。分析了OFDM系统出现过高的峰均功率比的原因和PAPR对系统通信质量的损害,概括了常用的几种抑制峰均功率比的思路,提出一种有效抑制峰均功率比的方法——相位扰动法,并给出了其仿真结果和讨论。该相位扰动法使OFDM信号的峰均功率比得到有效抑制,且硬件上容易实现。更多还原

【Abstract】 OFDM technology is slated for wireless broadband access and the kernel technology of 4G mobile communication in the train of CDMA technology.Though,the higher peak-to-average power ratio in OFDM is the difficulty that encumbrance that development and application.In the paper,the cause of peak-to-average power ratio in OFDM systems and the damage of PAPR to the system is analysed.At the same time,the methods to reduce the PAPR are generalized.At the last,a new effective method——the phase disturb arithmetic and its simulation result is provided.The phase disturb arithmetic reduced the PAPR in OFDM effectively,and it is easy to realize in real system.更多还原