Symmetrical High-Speed Digital Subscriber Line (SHDSL) Channel Modelling

Rohisham, Ramlan (2016) Symmetrical High-Speed Digital Subscriber Line (SHDSL) Channel Modelling. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Symmetrical high-speed digital subscriber line (SHDSL) is a data communication technology for equal transmits and receive data rate over the copper telephone lines. Difference from other DSL technologies, SHDSL uses multi-level pulse-amplitude modulation (PAM) together with trellis coding. It is much faster than a conventional voiceband modem that can provide nowadays. In this study the speed of the SHDSL system was evaluated and estimated by observing the Bit Error Rate (BER) during simulation process. Simulation of SHDSL single line base band and transceiver was conducted by given the information to the system including a transmitter, a receiver and a channel model. This simulation, perform a certain state of trellis code and using a certain rate convolution with corresponding of Viterbi algorithm at the receiver part. In the channel part, the calculation of signal-to-ratio (SNR) was performed and this includes the insertion loss in the channel, Far-end crosstalk (FEXT) and Near-end crosstalk (NEXT), and Power Spectral Density (PSD). All this is referred to the standard ITU-T G.991.2. For the result of this study, the BER achieve is 10-6 with transmitted bits of 106 bits. The BER achieved is based on the calculated SNR and the value of SNR to get BER 10-6 is around 37dB. It is assuming that the BER can be achieve 10-7 by transmit 109 of bits. By performing this simulation with the result stated, the SHDSL can be estimate its speed.

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