SophiaPretty

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    Strayer,Devery,Harvard University
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Category > Computer Science Posted 21 Dec 2017 My Price 5.00

providers are now offering ADSL service to home

Telephone service providers are now offering ADSL service to home using the existing twisted-pair telephone wires. The signal can be carried up to a maximum of 1-MHz baseband with an S/N (signal power/noise power in ratio) of 30 dB. S/N in decibels (dB) is defined as 10 log10(signal power/noise power). Using MPEG-2 compression techniques, (a) a non-sports video channel can be broadcast at 3-Mbps data rate and (b) a sports video channel at 6 Mbps. Shannon’s limitation for information capacity for a channel is given by

Maximum bit rate (bits/sec) = B log2(1+S/N),

where S/N is in ratio (and not in dB) and B is the bandwidth. How many video channels can simultaneously be transmitted over the line for the two cases?

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SophiaPretty
(5)
Status NEW Posted 21 Dec 2017 07:12 AM My Price 5.00

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