SIGNAL PROCESSING METHOD AND DEVICE, AND OPTICAL FIBRE TRANSMISSION SYSTEM

摘要

Embodiments of the present invention relate to the field of optical communication, and provide a signal processing method, an apparatus, and an optical fiber transmission system, so that a transmission rate of an optical fiber transmission system can be increased without changing an existing optical transceiver structure. The signal processing method includes: obtaining, by an optical transmitter, a first digital signal, where the first digital signal is a one-dimensional bipolar digital signal; performing, by the optical transmitter, spectral compression and filtering on the first digital signal to generate a second digital signal; and performing, by the optical transmitter, frequency shift on the second digital signal, where a center location of a spectrum of the frequency-shifted second digital signal is at a frequency of 0.