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Phase shift keying optical modulation apparatus and method of encoding a symbol onto an optical carrier signal
Phase shift keying optical modulation apparatus and method of encoding a symbol onto an optical carrier signal
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机译:相移键控光调制设备和将符号编码到光载波信号上的方法
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摘要
Phase shift keying optical modulation apparatus comprising optical phase shifting apparatus and an optical modulator. The optical phase shifting apparatus is arranged to receive an optical carrier signal and is arranged to selectively apply a preselected optical phase shift to the optical carrier signal in dependence on a symbol of a 2N-level phase shift keying modulation format to be encoded onto the optical signal. The optical modulator is arranged to receive the optical carrier signal from the optical phase shifting apparatus and is arranged to apply a phase modulation to the optical carrier signal in dependence on the symbol, to thereby encode the symbol onto the optical carrier signal. The phase modulation is a phase-modulation of an N-level phase shift keying modulation format.
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