【摘要】 研究了传输速率为40Gb/s的相干光PM-QPSK传输系统。实验利用IQ调制器产生光QPSK信号。在接收端最终通过使用最小距离反馈MIMO-FES-CMA均衡方法,去除光链路上的色散、偏振态串扰、载波的频偏和相偏等,从而恢复QPSK信号,得到传输信号的星座图和误码率。实验结果表明,采用最小距离反馈MIMO-FES-CMA均衡方法所得到的误码性能与其它方法相比明显得到提高。更多还原

【Abstract】 This paper studies the coherent light PM-QPSK transmission system which 40Gb/s transmission rate.The experiment use of IQ modulator produce light QPSK signal.By using the minimum distance feedback MIMO-FES-CMA equilibrium method,removal of an optical link dispersion,polarization crosstalk,carrier frequency offset,and phase offset,thereby restoring the QPSK signal,signal constellation and the bit error rate are gained.The experimental results show that,by the minimum distance feedback MIMO-FES-CMA equilibrium method the BER performance can obviously be improved by compared with other methods.更多还原