TR-clipping algorithm for PAPRreduction in O-OFDM system
TR-clipping algorithm for PAPRreduction in O-OFDM system
复制标题
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Ni Guo-qiang
中科院分区：
文献类型：
--
作者：
Ni Guo-qiang
针对光正交频分复用(O-ofdm)系统存在的峰值平均功率比(PAPR)较高的问题，对传统的频调预留方法进行了改进，使之适应于现有的O-ofdm系统。提出了一种改进的tr与限幅相结合的方法，在减小限幅噪声影响的同时，降低了信号的峰均功率比。仿真结果表明，在合理的门限和预留子载波数为10-6时，采用tr限幅可以有效地抑制带内噪声和带外频谱。当BER=10-6时，该方法可以有效地抑制带内噪声和带外频谱。当限幅比γ从7分贝降至2分贝时，与限幅方法相比，所需的光信噪比从0.2dB降至7分贝。
There exists high peak to average power ratio(PAPR) in optical orthogonal frequency division multiplexing(O-OFDM) system.Traditional tone reservation(TR) method is improved to be adapted to current O-OFDM system.A new method combining of improved TR and clipping is proposed to reduce the influence of clipping noise and decrease the PAPR of OFDM signal at the same time.The proposed method is proved to be with low computational complexity and high technical feasibility.The simulation results show that the in-band noise and out-of-band spectrum are restrained effectively with TR-clipping under a reasonable value of threshold and reserved subcarriers number of W.For BER=10-6,as clipping ratio γ decreases from 7 dB to 2 dB,the needed OSNR is reduced from 0.2 dB to 7 dB compared with the clipping method.