针对光正交频分复用(OOFDM)系统中高峰均比的问题, 利用坐标旋转数字计算机(CORDIC)算法进行非线性压缩, 并采用现场可编程门阵列(FPGA)进行硬件实现, 在Matlab上对从FPGA抓取的信号进行分析, 计算出信号的峰均比以及通信系统的误码率, 并与传统OOFDM系统进行了对比分析。实验结果表明该算法能有效抑制信号的峰均比, 保证了通信质量。

Aiming at the problem of high peak to average power ratio in optical orthogonal frequency division multiplexing (OOFDM) system, the coordinate rotation digital computer(CORDIC) algorithm is used for nonlinear compression, and field programmable gate array(FPGA) is used for hardware implementation. The signal captured from FPGA is analyzed on Matlab, the peak to average power ratio and bit error rate of communication system are calculated, and compared with the traditional OOFDM system. Experimental results show that the algorithm can effectively suppress the peak to average power ratio of the signal and ensure the communication quality.