METHOD AND DEVICE FOR RECEIVING MULTI-CARRIER OPTICAL SIGNALS

摘要

The present invention relates to the field of communications, and in particular, to a method and a device for receiving a multi-carrier optical signal. The method includes: mixing a multi-carrier optical signal with a local optical signal having the same center frequency as the center frequency of the multi-carrier optical signal; performing photoelectric conversion and analog-to-digital conversion in succession on an optical signal obtained through the mixing to obtain a digital signal; performing fast Fourier transform FFT on the digital signal to obtain a frequency domain signal; grouping the frequency domain signal according to each frequency band corresponding to its respective carrier in the multi-carrier optical signal, and performing inverse fast Fourier transform IFFT on each frequency domain signal group obtained through the grouping to obtain a corresponding time domain signal for each carrier; and performing data restoration on each time domain signal corresponding to its respective carrier to obtain data carried on each carrier. The solutions of the present invention only require one set of coherent reception device, and have low cost and low power consumption.