Engineering Coursework help
1. Convert
the binary data “011010” into analog waveform using following modulation
techniques:
a.
Two
level Amplitude Shift Keying
b.
Two
level Frequency Shift Keying
c.
Two
level Phase Shift Keying
d.
Differential
Phase shift keying
e.
Four
level Amplitude Shift Keying
f.
Four
level Phase Shift Keying
g.
Eight
level Amplitude Shift Keying
2. With
fc = 500 kHz, fd = 25 kHz, and M = 16 (L = 4 bits), compute the frequency
assignments for each of the sixteen possible 4-bit data combinations.
3. Draw
the approximate Analog Modulation and Frequency Modulation waveforms in
complete steps for the following signal:
4. Draw
the 16 QAM Constellation Diagram having two different amplitude levels and
eight different phase levels.
5.
Explain
and draw the Error Detection Process for Cyclic Redundancy Check (CRC).
6.
Compute
the frame check sequence for the following information:
Message =
10111100, Pattern = 11011
7. Compute
the transmitted signal using Direct Sequence Spread Spectrum for the following
information:
Input: 1011,
Locally Generated PN bit stream: 101011011010, T = 3Tc
8. What
is the difference between Infrastructure and ad hoc modes in WLAN? Draw their
relative diagrams as well.
9. Compare
the differences of TCP and OSI protocols for wired and wireless LANs using
diagrams.
10. Explain why the square and circle shapes
cells for cellular communications are not appropriate as compared to hexagonal
shape cells.
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