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Blind modulation format identification using nonlinear power transformation
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DOI：10.1364/OE.25.030895.png)
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Abstract
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This paper proposes and experimentally demonstrates a blind modulation format identification (MFI) method delivering high accuracy (> 99%) even in a low OSNR regime (< 10 dB). By using nonlinear power transformation and peak detection, the proposed MFI can recognize whether the signal modulation format is BPSK, QPSK, 8-PSK or 16-QAM. Experimental results demonstrate that the proposed MFI can achieve a successful identification rate as high as 99% when the incoming signal OSNR is 7 dB. Key parameters, such as FFT length and laser phase noise tolerance of the proposed method, have been characterized. (C) 2017 Optical Society of America
Keywords:
DIGITAL COHERENT RECEIVERS
OPTICAL RECEIVERS
RECOGNITION
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