Wireless Network Communication: Modulation, Protocols & More

This document presents a solved assignment focusing on wireless network and communication concepts. It covers various modulation techniques such as Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), and Phase Shift Keying (PSK), along with their multilevel variations. The assignment includes calculations for frequency assignments, illustrations of analog and frequency modulation waveforms, and a 16 QAM constellation diagram. Furthermore, it delves into error detection processes using Cyclic Redundancy Check (CRC), computes transmitted signals using Direct Sequence Spread Spectrum, and differentiates between infrastructure and ad hoc modes in WLAN. Finally, it compares the TCP and OSI protocols for wired and wireless LANs, and explains the preference for hexagonal-shaped cells in mobile service areas. This resource is available on Desklib, which offers a range of study tools and solved assignments for students.

Running head: WIRELESS NETWORK & COMMUNICATION 1
Wireless Network & Communication
Trivedi Sri Harsha (ID: 43239)
Institution Affiliation

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QUESTION 1
A)
B)

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C)
D)
E) 4-ASK

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F)

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G)
Question 2:
Solution
 With fc = 500 kHz,
 fd = 25 kHz,
 M = 16 (L = 4 bits),
Calculation of f1
f1=fc + {2i –l-m}*fd [1]
Substituting the values provided into the equation;
f1=fc + {2i –l-m}*fd
=500 + {2(1) – 4 – 16} 25
= 50 KHz
Calculation of f2
f2=fc + {2i –l-m}*fd

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Substituting the values provided into the equation;
f2=fc + {2i –l-m}*fd
=500 + {2(2) – 4 – 16} 25
= 100 KHz
Calculation of f3
f3=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f3=fc + {2i –l-m}*fd
=500 + {2(3) – 4 – 16} 25
= 150 KHz
Calculation of f4
f4=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f4=fc + {2i –l-m}*fd
=500 + {2(4) – 4 – 16} 25
= 200 KHz
Calculation of f5
f5=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f5=fc + {2i –l-m}*fd
=500 + {2(5) – 4 – 16} 25
= 250 KHz
Calculation of f6

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f6=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f6=fc + {2i –l-m}*fd
=500 + {2(6) – 4 – 16} 25
= 300 KHz
Calculation of f7
f7=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f7=fc + {2i –l-m}*fd
=500 + {2(7) – 4 – 16} 25
= 350 KHz
Calculation of f8
f8=fc + {2i –l-m}*fd [1]
Substituting the values provided into the equation;
f8=fc + {2i –l-m}*fd
=500 + {2(8) – 4 – 16} 25
= 400 KHz
Calculation of f9
f9=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f9=fc + {2i –l-m}*fd
=500 + {2(9) – 4 – 16} 25
= 450 KHz

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Calculation of f10
f10=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f10=fc + {2i –l-m}*fd
=500 + {2(10) – 4 – 16} 25
= 500 KHz
Calculation of f11
f11=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f11=fc + {2i –l-m}*fd
=500 + {2(11) – 4 – 16} 25
= 550 KHz
Calculation of f12
f12=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f12=fc + {2i –l-m}*fd
=500 + {2(12) – 4 – 16} 25
= 600 KHz
Calculation of f13
f13=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f13=fc + {2i –l-m}*fd
=500 + {2(13) – 4 – 16} 25

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= 650 KHz
Calculation of f14
f14=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f14=fc + {2i –l-m}*fd
=500 + {2(14) – 4 – 16} 25
= 700 KHz
Calculation of f15
f15=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f15=fc + {2i –l-m}*fd
=500 + {2(15) – 4 – 16} 25
= 750 KHz
Calculation of f16
f16=fc + {2i –l-m}*fd
Substituting the values provided into the equation;
f16=fc + {2i –l-m}*fd
=500 + {2(16) – 4 – 16} 25
= 800 KHz
Question 3: approximate Analog Modulation and Frequency Modulation
Modulation, in reference to the signals, refers to the modulation of various parameters to get
the desired signal. For instance, the amplitude, phase, and frequency. When one factor is

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undergoing modulation, other factors will be kept constant. For example, in frequency
modulation, the amplitude and the phase is kept constant.

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In this case, the modulated signals will be:

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