High Accuracy and Low Complexity Frequency Offset Estimation Method Based on All Phase FFT for M-QAM Coherent Optical Systems
The traditional fast Fourier transform based frequency offset estimation (FFT-FOE) estimates the frequency offset by searching the spectral peak of the signal after the fourth power operation, which is suitable for multiple modulation formats. But the accuracy of FOE is limited by the number of FFT...
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| Main Authors: | , , , |
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| Format: | article |
| Language: | EN |
| Published: |
IEEE
2022
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| Subjects: | |
| Online Access: | https://doaj.org/article/9d1adedd395344f5b9019a8e11996a31 |
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