HW5 - IT 420 Homework 5 Wonchul Song 1 A cable modem uses 16-PSK to modulate the upstream data Assume that a user has full use of one 6MHz channel

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IT 420 Homework 5 – Wonchul Song 1. A cable modem uses 16-PSK to modulate the upstream data. Assume that a user has full use of one 6MHz channel. What is the maximum upstream bit rate? 2^4 = 16-PSK Bit rate = Freq * bit/dot = 6mhz * 4 bit/dot 2. Answer question 12.7 on page 216 of the textbook. Effective data rate is dependent on following things; current load on the provider’s server, user’s access technologies used to connect to provider’s servers etc. ADSL is ‘adaptive’ to users’ environment. 3. Answer question 14.1 on page 253 of the textbook. First approach can be made by using a modified form of multiplexing technique. Second is by engaging in distributed algorithms for controlled access and lastly by using a random access strategy. 4. The Starship Enterprise is visiting a planet where the inhabitants have 6 fingers. Not surprisingly, they use a base 6 numbering system. The planet provides a beam-down coordinate of 3401 (in base 6). Translate this to base 10 so the crew can safely go on shore
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This note was uploaded on 03/28/2012 for the course IT 420, 245 taught by Professor Kattering during the Spring '12 term at NJIT.

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HW5 - IT 420 Homework 5 Wonchul Song 1 A cable modem uses 16-PSK to modulate the upstream data Assume that a user has full use of one 6MHz channel

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