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

MITS5003 Wireless Networks & Communication –


Assignment No 2

Submission Due Date: 04/10/2019 before 5 pm

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Your document should be a single word or pdf document containing your report.

1. Convert the binary data “110101” into analog waveforms using following modulation


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 in

complete steps for the following signal:

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 bit stream: 011011010110, T = 4Tc

8. Explain why the square and circle shapes cells for cellular communications are not

appropriate as compared to hexagonal shape cells.

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