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Abidin A.N.Z.,TM Research and Development SDN. Bhd. | Abdullah J.,University Tun Hussein Onn Malaysia | Asrokin A.,TM Research and Development SDN. Bhd. | Chuah T.C.,Multimedia University | And 4 more authors.
Proceedings - 5th IEEE International Conference on Control System, Computing and Engineering, ICCSCE 2015 | Year: 2015

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. © 2015 IEEE.


Azlan Tee A.T.M.,TM Research and Development Sdn Bhd | Marzuki A.S.M.,TM Research and Development Sdn Bhd | Selamat S.,TM Research and Development Sdn Bhd | Khalil K.,TM Research and Development Sdn Bhd | And 2 more authors.
2014 IEEE Student Conference on Research and Development, SCOReD 2014 | Year: 2014

This paper presents the study on the rain attenuation at 40 GHz via terrestrial link in Malaysia. Malaysia is situated in the tropical region and known to experience a very heavy rainfall annually. Consequently, this heavy rainfall has high impact on the millimeter wave propagating signals. In this study, rainfall data at Cyberjaya were collected using rain gauge, and then they were analyzed to get the rainfall rate in term of probability of the time exceedance. Five different prediction models were used to estimate the rain attenuation values; ITU-R 530-15 models, ITU-R 530-13 models, revised Moupfouma's model, revised Silva Mello's model and Lin's model. Among these five models, ITU-R 530-15 model gave the closest estimated value to the measured rain attenuation at 38 GHz. By applying this model with the acquired rainfall rate of 130 mm/h, it gave the estimated attenuation value of 22.64 dB within 0.3 km propagating path at frequency of 40 GHz. © 2014 IEEE.

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