Improved SVM equalization method and system for NG-PON

Abstract

The invention discloses an improved SVM equalization method and system for an NG-PON. The method in the invention comprises the steps of: (1), inserting training sequences into digital signals needingto be transmitted every the set length, generating electrical NRZ signals through high-rate NRZ modulation, and converting the high-rate electrical NRZ signals including the training sequences into optical NRZ signals; (2), transmitting the optical NRZ signals to a receiving end, and converting the received optical NRZ signals into the electrical NRZ signals; (3), performing up-sampling on the electrical NRZ signals, and performing down-sampling after time synchronization; (4), extracting the training sequences, constructing a characteristic value vector for each training sequence, and calculating an optimal hyperplane; (5), judging information sequences by utilizing the optimal hyperplane, so that equalization is realized; and (6), returning to the step (4) after equalization of the information sequences is completed every the set length. According to the improved SVM equalization method and system for the NG-PON disclosed by the invention, the problem that the receiving sensitivityof the system is decreased due to signal distortion, intersymbol interference and the like introduced by bandwidth limitation when high-rate signals are transmitted by a low-bandwidth device can be solved.

Description

technical field [0001] The invention relates to the technical field of NG-PON (Next Generation Passive Optical Network) systems, in particular to an improved SVM (Support Vector Machine) equalization method and system for low-cost and high-speed NG-PON. Background technique [0002] In recent years, with the rapid development of Internet services, the bandwidth requirements of end users are increasing rapidly. In 2015, the IEEE 802.3 working group carried out the standardization work of Next Generation Ethernet Passive Optical Network (NG-EPON). The goal of NG-EPON is to provide one wavelength with 100-Gb / s capacity or four stacked wavelengths with 25Gb / s capacity. Among them, the transmission of 25Gb / s per stack wavelength is considered to be the upgrade path of NG-PON2. At the same time, considering the sensitivity of the PON system to cost, in order to control the cost, the transmission rate of 25Gb / s is usually realized by optical devices with 10G bandwidth. The most ...

AI Technical Summary

Problems solved by technology

However, this scheme uses the traditional DFE and FFE adaptive algorithms, which requires a long training sequence, which will reduce the effective information rate to a certain extent, and has high computational complexity and low computational efficiency.

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