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为了适应光突发接收机的快速信道均衡和频偏估计的要求,提出一种时域均衡联合频偏估计的方法。频偏估计的叠加结果作为反馈用于电信道均衡器误差信号的计算,同时用于均衡器估计值的频偏补偿。通过仿真验证了时域均衡联合频偏估计可以提高系统性能,并对影响光突发接收机的参数设置进行了研究;仿真研究了自适应均衡联合频偏估计时光突发接收机适用的稳态频偏和光纤传输距离范围,当系统中存在1GHz的频偏时系统仍然能够传输180km以上。研究结果表明,本文提出的时域均衡联合频偏估计的算法,在当光突发接收机中存在频偏暂态效应时仍然能够有效完成信道均衡和频偏估计与补偿。
In order to meet the requirement of fast channel equalization and frequency offset estimation of optical burst receiver, a method of time domain equalization joint frequency offset estimation is proposed. The result of the superposition of the frequency offset estimation is used as feedback for the calculation of the error signal of the electrical channel equalizer and also for the frequency offset compensation of the equalizer estimation value. Simulation results show that time-domain equalization combined with frequency offset estimation can improve the performance of the system, and the parameter settings affecting the optical burst receiver are studied. The adaptive steady-state adaptive fading receiver Frequency offset and optical fiber transmission distance range, the system can still transmit more than 180km when there is 1GHz frequency offset in the system. The results show that the algorithm proposed in this paper can still estimate and compensate channel equalization and frequency offset effectively when there is frequency offset transient in optical burst receiver.