Method for identifying modulation format of optical communication signal with differential phase amplitude ratio
A signal modulation format and differential phase technology, applied in the field of modulation identification, can solve the problems of high complexity and high OSNR requirements
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[0049] This embodiment describes the specific implementation of a method for identifying the modulation format of an optical communication signal using a differential phase-amplitude ratio according to the present invention.
[0050] figure 1 It is a system block diagram and connection relationship based on a differential phase-amplitude ratio optical communication signal modulation format identification method of the present invention; figure 2 System design for specific implementation.
[0051] exist figure 2 Among them, at the transmitting end, the continuous wave laser, that is, the CW Laser is replaced by the IQ modulator, that is,
[0052]IQMod, modulation; in the IQ modulator, the I-channel and Q-channel signals are modulated by two random bit sequences generated by an arbitrary waveform generator; the emitted laser signal is 1550nm, and the line width is 5kHz.
[0053] The IQ modulator generates three modulated signals of QPSK, 16QAM and 64QAM at a baud rate of 10...
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