中文摘要：

为了解决多模光纤（MMF）通信系统中的自适应调制光正交频分复用（AMO-OFDM）技术存在的算法复杂度、自适应调制方案的具体硬件实现难度大等问题，本文提出了一种自适应功率分配光正交频分复用（APAO-OFDM）技术，并给出了一种高效的自适应功率分配算法。仿真结果表明，等信噪比（SNR）功率分配方式的APAO-OFDM技术能够获得与AMO-OFDM技术相近的最大传输速率性能，当最大传输速率低于14Gbit／s时两者需要的发射光功率几乎相等。

英文摘要：

A novel technique named adaptive power allocation optical orthogonal frequency division multiplexing（APAO-OFDM） is proposed in this paper. The efficient adaptive power allocation algorithm is also developed. In comparison with the adaptively modulated optical orthogonal frequency division multiplexing（AMO-OFDM） technique, the simulation results show that the two techniques based on equal SNR power allocation can achieve similar maximum transmission performance, but the cost of APAO-OFDM may be low. In addition,the required optical transmitter power coupled into multimode fibers （MMFs） in APAO-OFDM systems is very similar to that used in the AMO-OFDM systems when the transmission capacity is lower than 14 Gbit/s.