基于扩展卡尔曼的PDM-16QAM偏振态和载波相位快速跟踪

发布时间：2018-11-06 18:55

【摘要】：在偏振复用(PDM)高速光通信系统的相干检测中,需要实现信号偏振态和载波相位的快速跟踪。将扩展卡尔曼滤波器用在偏振复用16进制正交振幅调制(PDM-16QAM)光调制信号相干接收机中,成功实现了偏振态和载波相位的快速精确跟踪。在单信道112Gb/s PDM-16QAM传输系统中,数值仿真发现,扩展卡尔曼滤波器所能跟踪的最大偏振态旋转速率可达级联多模算法的100倍,而且具有很好的收敛精度,其收敛速度和精度可以通过调优参量控制。使用扩展卡尔曼滤波器跟踪100kHz线宽18 Mrad/s偏振态旋转信号时,10-3误码率(BER)对应的接收机灵敏度代价仅为0.2dB。研究了应用于长距离传输光通信系统的扩展卡尔曼相干接收的性能。
[Abstract]:In the coherent detection of polarization multiplexing (PDM) high speed optical communication system, it is necessary to realize the fast tracking of the polarization state and carrier phase of the signal. The extended Kalman filter is used in the coherent receiver of polarization multiplexed hexadecimal quadrature amplitude modulation (PDM-16QAM) optical modulation signal to realize the fast and accurate tracking of polarization state and carrier phase. In a single-channel 112Gb/s PDM-16QAM transmission system, numerical simulations show that the maximum polarization rotation rate of the extended Kalman filter can be 100 times that of the cascaded multimode algorithm, and the extended Kalman filter has a good convergence accuracy. Its convergence speed and precision can be controlled by optimizing parameters. When the extended Kalman filter is used to track the polarization-state rotation signal with 100kHz linewidth of 18 Mrad/s, the sensitivity cost of the receiver corresponding to the 10-3 bit error rate (BER) is only 0.2 dB. The performance of extended Kalman coherent receiver for long distance optical communication systems is studied.
【作者单位】：哈尔滨工业大学深圳研究生院;
【基金】：国家自然科学基金(61205046) 深圳市战略性新兴产业发展专项资金(JCYJ20120613150130014) 哈尔滨工业大学科研创新基金(HIT.NSFIR.2011131) 哈尔滨工业大学深圳研究生院重点实验课程建设项目
【分类号】：TN929.1

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