ZHAO Lun, YU Jian-guo, WANG Ren-fan, et al. An Improved Two-Stage Carrier Phase Estimation Algorithm in Coherent Optical Communication[J]. 2016,(6):1-4.
Aiming at the problem of high computational complexity of existing Blind Phase Search(BPS)algorithm
the thesis proposes a two stage carrier phase estimation algorithm based on improved QPSK partition algorithm.The first stage of the algorithm is based on traditional P3 algorithm
which is used to realize rough estimation.The second stage of the algorithm is based on the proposed improved QSPK partition algorithm
which is used to compensate the residual phase noise.The simulation results show that the performance of this algorithm is similar to that of BPS algorithm.However
the computational complexity is about 13 times lower than that of the BPS algorithm.