High Accuracy and Low Complexity Frequency Offset Estimation Based on All-Phase FFT for M-QAM Coherent Optical Systems

Qian Li

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High Accuracy and Low Complexity Frequency Offset Estimation Based on All-Phase FFT for M-QAM Coherent Optical Systems

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arxiv 2105.10394 v1 pith:DBYH6GZW submitted 2021-05-15 eess.SP

Qian Li This is my paper · ORCID

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keywords complexityestimationaccuracyalgorithmall-phasefrequencym-qamoffset

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A low complexity frequency offset estimation algorithm based on all-phase FFT for M-QAM is proposed. Compared with two-stage algorithms such as FFT+CZT and FFT+ZoomFFT, our algorithm can lower computational complexity by 73% and 30% respectively, without loss of the estimation accuracy.

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