变速率光OFDM系统中自适应插值法的研究

Research on adaptive interpolation method of variable-rate optical OFDM system

文中给出了一种基于自适应插值算法的光OFDM信号变速率传输方案及数据处理过程。该方案的基本原理是根据数据传输速率的要求对在发送端对数据进行相应的插值处理,实现光OFDM信号的变速率发送;s在接收端利用反插值求"n"运算来实现信号速率的自适应接收。理想情况下,通过并行异或法进行求"n"操作;非理想情况下,通过二次差分方法实现n值求解。仿真实验表明,利用二次差分方法可以提高系统的自适应接收能力。

This paper presents a method of variable rate transmission scheme and data processing of optical OFDM signal based on adaptive interpolation algorithm.The basic principle of the program is sent to the transmitting side data corresponding interpolation processing,variablerate optical OFDM signal based on the data transmission rate requirements;at the receiving end the use of inverse interpolation seeking“n”operation achieves signal speeds from adapted to receive.Ideally,the parallel XOR method is evaluated“n”operation;non-ideal circumstances,the value of n is obtained by solving secondary adaptive differential method.The simulation results show that the use of secondary adaptive differential method can improve the reception capacity of the system.