# MITS5003 - Wireless Networks & Communication Report Writing - 2019S2 - Analog Modulation and Frequency Modulation Waveforms - Communication Assessment Answer

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MITS5003

##### MITS5003 - Wireless Networks & Communication Report Writing - 2019S2 - Communication Assessment Answer

Questions

1. Convert the binary data “110101” into analog waveforms using the 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 = 1000 kHz, fd = 50 kHz, and M = 16 (L = 4 bits), using Multiple frequency-shift Keying (MFSK), compute the frequency assignments for each of the sixteen possible 4- bit data combinations.

3. Draw the approximate Analog Modulation and Frequency Modulation waveforms.

4. Draw the 16 QAM Constellation Diagram having four different amplitude levels and four different phase levels.

5. Explain and draw the Error Detection Process for Cyclic Redundancy Check (CRC).

6. Compute the frame check sequence using Cyclic Redundancy Check (CRC) for the following information: Message = 111010110, Pattern = 101110

7. Compute the transmitted signal using Direct Sequence Spread Spectrum for the following information: Input: 101, Locally Generated PN bitstream: 011011010110, T = 4Tc

8. Explain why the square and circle shapes cells for cellular communications are not appropriate as compared to hexagonal shaped cells.

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• Posted on : November 02nd, 2018

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