TELE 5310: Midterm Practice Problems (see solutions in separate doc)
1) For narrowband low bitrate speech codecs, what is the typical bit rate at the input of the
encoder (uncompressed speech)?
48000 bps
64000 bps
96000 bps
128000 bps
None of the abo
TELE 5310: Homework 6
Due on 12/1/15 (typed solutions = +10 extra points)
1) If a transmission system uses a 64-QAM modulation scheme and the symbol duration is
T = 100 s, what are the symbol Rs and transmission Rb rates ? (20 points)
2) If the bandwidth
TELE 5310: Homework 5
Due on 11/3/15 (typed solutions = +10 extra points)
1) 160 samples of speech are sampled at 16000 samples/second and buered before being
encoded by a low bitrate codec. The encoding consumes 10 milliseconds, the transmission
delay is
TELE 5310: Homework 4
Due on 10/27/15 (typed solutions = +10 extra points)
1
A source has a 2-symbol alphabet cfw_X, Y such that P (X) = 8 .
1) Design a Human code for the second extension of the source (50 points).
2) Design a Human code for the third e
TELE 5310: Homework 3
Due on 10/20/15 (typed solutions = +10 extra points)
1) If an analog-to-digital converter has a midrise uniform quantizer with an input dynamic
range (4V, 4V ) and its resolution is R = 6 bits/sample, what is its step size (mV)? (20
TELE 5310: Homework 2
Due on 10/6/15 10/13/15 (postponed) (typed solutions = +10 extra points)
1) A transmitter X sends three possible symbols (0, 1 or 2), what are the probabilities of
the symbols received by the receiver Y if the channel has the charact
TELE 5310: Homework 1
Due on 9/29/15 (typed solutions = +10 extra points)
1) What is the power Px of the sinusoidal signal below assuming a 1 load measured in
Watts and dBm units ? What is the frequency of the signal? (25 points)
2) Given the signal x(t)
Note a few things:
1. It is a logarithmic frequency scale, that means that the values of the x axis are not linearly
distributed:
this is 3000 Hz
this is 200 Hz
2. The filter is band pass (it doesnt start at 0) so the bandwidth is approximately the distan
TELE 5310: Homework 2
Due on 10/6/15 (typed solutions = +10 extra points)
1) A transmitter X sends three possible symbols (0, 1 or 2), what are the probabilities of
the symbols received by the receiver Y if the channel has the characteristics shown below?
TELE 5310: Homework 1
Due on 9/29/15 (typed solutions = +10 extra points)
1) What is the power Px of the sinusoidal signal below assuming a 1 load measured in
Watts and dBm units ? What is the frequency of the signal? (25 points)
2) If the noise power (Pn