摘要
在光OFDM系统中,由于调制器、D/A转换器、功率放大器和光纤的非线性,高峰均功率比的信号将会产生严重畸变,对系统的性能造成较大的影响。本文介绍了降低OFDM系统PAPR的主要方法,包括信号预畸变技术、编码技术、概率类技术,并对几种常用的方法利用Matlab进行了仿真,分析讨论了各自的优缺点及改进的空间。
In optical OFDM systems, due to the nonlinearity of the modulator, D/A converter, power amplifiers and optical fiber, high PAPR signal will be subject to distortion, and thus the system performance will be affected. The main methods reducing PAPR are introduced, including the pro-distortion technique, coding tech- nique and probability technique. Some methods are simulated with Matlab, and their virtues, shortcomings and improvement space are analyzed and discussed.
出处
《电光系统》
2010年第3期4-7,共4页
Electronic and Electro-optical Systems