Projeto e implementação em DSP de sistema de comunicação multiportadora baseado no padrão G.fast
The evolving broadband access systems using copper networks are currently deployed in a frequency band that goes up to 30 MHz, as specified in VDSL2. As hybrid fiber-copper architectures become more important in the industry and academia, using shorter loop lengths (i.e. up to 250 meters) from th...
| Autor principal: | ALMEIDA, Igor Mesquita de |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Pará
2014
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.ufpa.br/jspui/handle/2011/4616 |
| Resumo: |
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The evolving broadband access systems using copper networks are currently deployed in
a frequency band that goes up to 30 MHz, as specified in VDSL2. As hybrid fiber-copper
architectures become more important in the industry and academia, using shorter loop
lengths (i.e. up to 250 meters) from the last distribution point to users enables adopting
even higher frequencies to achieve very high data rates of 500 Mbps and beyond, as is the
case with the G.fast standard under development by ITU-T. In this work, a time-domain
simulator has been developed to evaluate G.fast system performance with different cyclic
extension lengths and different reference loop topologies specified by ITU-T. The simulation
results show that G.fast systems are robust to bridged taps and capable of providing
very high data rates for all simulated loop topologies to support next generation ultra
high speed broadband services. Furthermore, this work describes an ongoing effort to
implement a G.fast-based modem protototype in a hybrid multicore DSP and FPGA environment
using readily-available evaluation kits purchased by UFPA. Architecture plans,
communication protocols and benchmarks are presented and evaluated to conclude that
such a prototype is both feasible and flexible to support several avenues of research in
next generation broadband. |