Implementation Method And Matlab Simulation Of The Key Technologies In VDSL2 System

With the advent of the information age,people's demand for the network is becoming more and more urgent,but also the speed and quality of network access has been put forward more and more high demand.DSL(Subscriber Line Digital)access technology in the past ten years has been the most widely used and most popular way of access to operators and users.DSL technology is the use of telephone lines for the media,the use of a higher frequency band than the voice band with digital modulation technology,and the use of more advanced digital signal processing technology to provide high-speed rate of fixed network access.The core of DSL technology is OFDM(orthogonal frequency division multiplexing)technology.This thesis is based on the company's product research and development,in this thesis,at first analysis of ITU-T G.993.2 VDSL2(Second generation very high speed digital subscriber line)protocol,then select implementation method and MATLAB simulation of the key technologies.The main contents are as follows:1.G.993.2 VDSL2(Second generation very high speed digital subscriber line)ITU-T protocol analysis,to determine the implementation methods of key part in VDSL2(Second generation very high speed digital subscriber line)system.2.Construction of data frame in MATLAB,Sub module simulation of the key algorithms(encoding and decoding,timing recovery,header synchronization,frequency domain equalization,time domain equalization,channel estimation)in VDSL system,and display the figure simulation result.3.Each algorithm simulation module string together to form a whole communication system transceiver.Complete the whole set of communication system,coding and decoding,modulation,channel estimation,time domain frequency domain equalization and other aspects.Then analysis and confirm the validity of the algorithm.Based on the MATLAB simulation,we can provide the specific hardware requirements for the VDSL2(Second generation very high speed digital subscriber line)system,and guide the design work to a certain extent,in order to better match the VDSL2 communication system.