Modeling And Simulation Of Broadband Coaxial Cable Network

As the increasing popularity of high-definition video, cloud technology, interactivegames and other applications, the capacity and bandwidth requirements of communicationsystem continue to be improved, and the high speed access system has become a key point ofcommunication technology. Because of the wide covering network, massive users andsupport from the operator enterprise, CATV (Community Antenna Television) coaxial cablenetwork has become an important development direction of high speed access system. Manycoax cable access technologies have come out such as down conversion Wi-Fi, MoCA(Multimedia over Coax Alliance), HomePLUG (HomePLUG PowerLine Alliance)HomePNA (Home Phoneline Networking Alliance) and so on. Coaxial cable accesstechnology has no doubt become an important technology of access system.The work was mainly focused on the most widely used CATV coaxial cable network inthis thesis. The main contents are as follows:(1) The components features were studied, and different channel modeling methodswere compared.(2) Through the theory analysis and investigation, a new algorithm to calculate thefrequency responses was proposed. This method is based on the simulation of multipathpropagation. It could estimate all responses of any given point-to-point channel accurately atone time.(3) A measurement environment of coaxial channel was built, and then all kinds ofmostly used components and network were tested. The simulation results have been verifiedsuccessfully by measurement on actual network, and the absolute error of attenuation at anyfrequency point is less than0.5dB.This modeling approach can be used to model any coaxial cable network, so long as theconstruction and dimension are known. It is helpful to analyze the performance of differentdistribution networks and to identify potential difficulties. It is also useful in the faultdiagnosis and location for the further study.