SVM equalization method and system for maximum variance data selection of low bandwidth highspeed optical communication

Abstract

The invention provides a maximum variance data selection and SVM equalization method for low bandwidth highspeed optical communication, which comprises the following steps: step 1, inserting a set number of training sequences into a transmitted digital signal data header, generating an electrical NRZ signal through highspeed NRZ modulation, and converting the electrical NRZ signal into a light NRZsignal by an optical modulator; step 2: transmitting the signal to a receiving end through an optical fiber, and converting the received light NRZ signal into an electrical NRZ signal via the receiving end; step 3, sampling the electrical NRZ signal, and then carrying out time synchronization; step 4, extracting the training sequence from the time-synchronized data; step 5, extracting an optimumdiscriminant sample point in each code symbol sample point in each segment by using the method of maximizing variance, and constructing a feature vector for each training sequence; step 6, using the feature vector of the training sequence, and adopting the SVM algorithm to train an optimal classification hyperplane; step 7, constructing a feature vector for each new unknown code symbol; step 8, using the optimal classification hyperplane to classify the NRZ electrical signals.

Description

technical field [0001] The invention belongs to the technical field of low-bandwidth high-speed optical communication systems, and in particular relates to an SVM (support vector machine) equalization method and system for maximizing variance data selection of low-bandwidth high-speed optical communication. Background technique [0002] In recent years, with the development of various emerging services, the bandwidth requirements of end users are increasing rapidly. This makes the requirements for the wavelength rate of optical communication higher and higher, and the rate of a single wavelength is developing towards 40Gb / s, or even 100Gb / s. At present, the operating wavelength of the laid G.652 standard optical fiber is C-band, which has relatively large dispersion, and the impact of dispersion will become more serious as the speed increases. Dispersion will lead to pulse broadening, causing crosstalk between symbols, causing signal distortion, resulting in an increase in ...

AI Technical Summary

Problems solved by technology

However, this solution uses a traditional electric domain equalizer, which requires a long training sequence, high equalization expenses, and high computational complexity, so the overall performance needs to be further improved.

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