G.fast channel modelling based on copper cable characteristics

The emerging gigabyte fast access to customer terminal (G.fast) project has been initiated within ITU Telecommunication Standardization Sector (ITU-T) SG15 in February 2011. This new copper access technology is expected to provide aggregate (upstream and downstream) data rates up to 1 Gbps over distances up to 250m. This paper discusses the concept of G.fast channel modelling based on copper cable measurements. The cable insertion loss and far end crosstalk (FEXT) transfer function are measured from a 10-pair cable with 0.5mm wires gauge. The G.fast transceiver is simulated based on the ITU-T specifications. The attainable data rate performance is simulated for distances up to 250m. The bit rate performance are expected to decrease proportional to distance and number of crosstalk in the lines. As a conclusion, in order to ensure successful deployment of G.Fast technology, it is essential for understanding the impact of FEXT noise towards data bit rate performance.