Modulation method, device and equipment for orthogonal frequency division multiplexing optical signal

Abstract

A modulation method, device and equipment for an OFDM optical signal, relating to the technical field of optical communication, the method comprising: performing bit symbol mapping and serial-to-parallel conversion on a baseband signal to obtain at least two subsymbol sequences of the baseband signal; Determine the subcarriers used to load the pilot signal in all subcarriers of the OFDM signal; update the content corresponding to the subcarriers used to load the pilot signal according to the information of the pilot signal; the content currently corresponding to all subcarriers of the OFDM signal Perform discrete Fourier inverse transform, parallel-to-serial conversion, digital-to-analog conversion, and electrical amplification processing, and modulate the processed data with bias electrical signals and DC light to form OFDM optical signals loaded with pilot signals. The invention enables all subcarriers of OFDM optical signals to be loaded with pilot signals, increases the number of subcarriers loaded with pilot signals, and further increases the number of pilot signals loaded on OFDM optical signals.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a modulation method, device and equipment for an OFDM optical signal. Background technique [0002] In optical communication, a pilot signal is a functional signal loaded on a high-speed data optical signal for monitoring, control, equalization, synchronization, and reference. For an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) optical signal including multiple subcarriers, a pilot signal may be loaded onto the OFDM optical signal during the process of forming the OFDM optical signal. Among them, when designing the OFDM optical signal, the number of subcarriers in the OFDM optical signal is determined according to the specific conditions of the baseband signal, and before the formation of the OFDM optical signal, which subcarriers in all the subcarriers of the OFDM optical signal are used to load which The ba...

AI Technical Summary

Problems solved by technology

[0005] Since all subcarriers are not fully loaded with baseband signals, when using subcarriers that do not load baseband signals to load pilot signals, the number of remaining subcarriers that do not load baseband signals is limited. Therefore, pilot signals that need to be loaded often appear The number is more than the number of sub-carriers that do not load the baseband signal, which limits the implementation environment of the prior art, resulting in certain limitations in the pilot signal loading method provided by the prior art

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