SVM equalization method and system for maximizing variance data selection for low-bandwidth high-speed optical communication

Abstract

The method of the present invention for maximizing variance data selection and SVM equalization for low-bandwidth and high-speed optical communication: Step 1: Insert a set amount of training sequence into the transmitted digital signal data header, generate an electrical NRZ signal through high-speed NRZ modulation, and convert the electrical The NRZ signal is converted into an optical NRZ signal through an optical modulator; Step 2: The signal is transmitted to the receiving end through an optical fiber, and the receiving end converts the received optical NRZ signal into an electrical NRZ signal; Step 3: Sampling the electrical NRZ signal, and then passing through Time synchronization; Step 4: Extract the training sequence from the time-synchronized data; Step 5: Extract the best discriminant sampling point in each symbol sampling point of each segment by maximizing the variance; and construct features for each training sequence vector; step 6: using the feature vector of the training sequence, using the SVM algorithm to train the optimal classification hyperplane; step 7: constructing a feature vector for each new unknown symbol; step 8: using the optimal classification hyperplane, for NRZ Classify 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.

Images