The Effect of Signal-to-Noise Margins on the Performance of ADSL
نویسندگان
چکیده
There is renewed interest in existing copper networks since the introduction of Asymmetric Digital Subscriber Line (ADSL) technology. ADSL will soon be available in South Africa, opening the broadband market to prospective users. As many users are placed within the same cable, they interfere with each other. Service providers want to guarantee the supplied data rate to the customer, even as the network change over time. For this purpose, a Signal-to-Noise ratio (SNR) margin is added to the customer profile. This paper estimates the number of interferers (possible services) which can be allowed for different line lengths, interferer types and SNR margins for a maximum data rate over the line. Keywords— Asymmetric Digital Subscriber Line (ADSL), Signal-toNoise ratio (SNR) margin, Performance margin, Interference margin, Margin estimation
منابع مشابه
Enhancement of Noise Performance in Digital Receivers by Over Sampling the Received Signal
In wireless channel the noise has a zero mean. This channel property can be used in the enhancement of the noise performance in the digital receivers by oversampling the received signal and calculating the decision variable based on the time average of more than one sample of the received signal. The averaging process will reduce the effect of the noise in the decision variable that will approa...
متن کاملDeveloping A Fault Diagnosis Approach Based On Artificial Neural Network And Self Organization Map For Occurred ADSL Faults
Telecommunication companies have received a great deal of research attention, which have many advantages such as low cost, higher qualification, simple installation and maintenance, and high reliability. However, the using of technical maintenance approaches in Telecommunication companies could improve system reliability and users' satisfaction from Asymmetric digital subscriber line (ADSL) ser...
متن کاملModeling and Simulation of Substrate Noise in Mixed-Signal Circuits Applied to a Special VCO
The mixed-signal circuits with both analog and digital blocks on a single chip have wide applications in communication and RF circuits. Integrating these two blocks can cause serious problems especially in applications requiring fast digital circuits and high performance analog blocks. Fast switching in digital blocks generates a noise which can be introduced to analog circuits by the common su...
متن کاملA Novel Noise Reduction Method Based on Subspace Division
This article presents a new subspace-based technique for reducing the noise of signals in time-series. In the proposed approach, the signal is initially represented as a data matrix. Then using Singular Value Decomposition (SVD), noisy data matrix is divided into signal subspace and noise subspace. In this subspace division, each derivative of the singular values with respect to rank order is u...
متن کاملA Novel Noise Reduction Method Based on Subspace Division
This article presents a new subspace-based technique for reducing the noise of signals in time-series. In the proposed approach, the signal is initially represented as a data matrix. Then using Singular Value Decomposition (SVD), noisy data matrix is divided into signal subspace and noise subspace. In this subspace division, each derivative of the singular values with respect to rank order is u...
متن کامل