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SIGNAL MODULATION METHOD, SIGNAL DEMODULATION METHOD, SIGNAL MODULATION APPARATUS, SIGNAL DEMODULATION APPARATUS AND SIGNAL TRANSMISSION SYSTEM
SIGNAL MODULATION METHOD, SIGNAL DEMODULATION METHOD, SIGNAL MODULATION APPARATUS, SIGNAL DEMODULATION APPARATUS AND SIGNAL TRANSMISSION SYSTEM
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机译：信号调制方法，信号解调方法，信号调制装置，信号解调装置和信号传输系统
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摘要
The present invention discloses a signal modulation method, including: demultiplexing an input signal into 2N sub-signals; grouping every two of the 2N sub-signals into a pair; performing filtering on two sub-signals in each pair; performing carrierless amplitude phase (CAP) modulation on the two sub-signals in each pair; modulating the two sub-signals in each pair to a same frequency band, to generate N pairs of CAP signals, where frequency bands of different pairs of sub-signals are different, and a spacing between center frequencies of two neighboring frequency bands is greater than or equal to an average value of baud rates of sub-signals corresponding to the two neighboring frequency bands; and combining the N pairs of CAP signals, and performing electro-optic modulation on a signal obtained after the combining. A signal demodulation method corresponding to the signal modulation method is further disclosed.
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