Carrier recovery for M-QAM signals based on a block estimation process with Kalman filter.


A novel carrier recovery scheme for demodulating optical M-ary quadrature amplitude modulation (M-QAM) signals is proposed and demonstrated. The proposed scheme treats a certain number of consecutive symbols as a processing block for which linear evolution of the carrier phases in time is assumed. The Kalman filter algorithm is employed to simultaneously… (More)
DOI: 10.1364/OE.22.015376

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