23 September 2017 Fast, accurate, and robust frequency offset estimation based on modified adaptive Kalman filter in coherent optical communication system
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Abstract
We propose a joint estimation scheme for fast, accurate, and robust frequency offset (FO) estimation along with phase estimation based on modified adaptive Kalman filter (MAKF). The scheme consists of three key modules: extend Kalman filter (EKF), lock detector, and FO cycle slip recovery. The EKF module estimates time-varying phase induced by both FO and laser phase noise. The lock detector module makes decision between acquisition mode and tracking mode and consequently sets the EKF tuning parameter in an adaptive manner. The third module can detect possible cycle slip in the case of large FO and make proper correction. Based on the simulation and experimental results, the proposed MAKF has shown excellent estimation performance featuring high accuracy, fast convergence, as well as the capability of cycle slip recovery.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yanfu Yang, Yanfu Yang, Qian Xiang, Qian Xiang, Qun Zhang, Qun Zhang, Zhongqing Zhou, Zhongqing Zhou, Wen Jiang, Wen Jiang, Qianwen He, Qianwen He, Yong Yao, Yong Yao, } "Fast, accurate, and robust frequency offset estimation based on modified adaptive Kalman filter in coherent optical communication system," Optical Engineering 56(9), 096109 (23 September 2017). https://doi.org/10.1117/1.OE.56.9.096109 . Submission: Received: 7 July 2017; Accepted: 30 August 2017
Received: 7 July 2017; Accepted: 30 August 2017; Published: 23 September 2017
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