Polarization shift keying modulation-demodulation method, system and method for updating self-adaptive filtering coefficients of reception end
A technology of adaptive filtering and adaptive filtering, applied in the field of coherent optical communication
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[0054] The invention discloses a modulation and demodulation method of polarization shift keying, which completely inherits the mature hardware architecture of polarization multiplexing QPSK for sending and receiving signals, and has the advantages of immunity to phase noise of polarization shift keying, reduction of nonlinear influence of optical fiber, and the like. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0055] Such as figure 1 As shown, the polarization shift keying modulation and demodulation method provided by the present invention comprises the following steps:
[0056] At the sending end, use QPSK (Quadrature Phase Shift Keying, Quadrature Phase Shift Keying) to modulate any QPSK signal in the X polarization direction as the X polarization signal In the direction of Y polarization, the input signal S(n) is modulated to be the same as the X polarization signal Same or opposite ...
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