CSE 516 (Fall 2016) Practice Set #1
1. ForachannelwithoutfadingorISIwhatisthemaximumpossibledatarategiven a bandwidth, B = 10MHz, and SNR of 23dB?
2. Log-distancepathlossisindicativeofwhattypeoffading?
3. Diffraction,reflection,andscatteringinduceswhattypeofsmall-scalefading?
4. Rapidmovementorchangesintheenvironment(channelvariations),transmitter, or receiver is indicative of what type of small-scale fading?
5. ConsiderasystemwithadesignconstraintofanS/Iof23dBorhigher.Iftheco- channel interference is limited to the first ring of nearest cells and a path-loss exponent of 3.5 is assumed, what is the frequency reuse factor given hexagonal cells?
6. Considerasystemwith10MHzofavailablebandwidth.Eachsimplexcarrieris 30kHz and we have a frequency reuse factor of 12. If there are 275 users in a cell, each generating 3 calls/hour, and each call is held average of 2 minutes, what is the blocking probability in the network? Assume 1 channel/carrier.
7. Considerthesysteminproblem5and6.WhatistheS/Irequiredtogeta blocking probability of 1%?