Category: Wireless & Mobile Communications

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Modulation Performance in Fading and Multipath Channels”. 1. Which of the following is specified by a specific number of bit errors occurring in a given transmission?a) Bit error rateb) Equally likely eventc) Outage eventd) Exhaustive events 2. Irreducible BER floor […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Spread Spectrum Modulation Techniques”. 1. Why spread spectrum technique is inefficient for a single user?a) Large transmission bandwidthb) Small transmission bandwidthc) Fixed transmission bandwidthd) Fixed null bandwidth 2. Which of the following is not a property of spread spectrum techniques?a) […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Combined Linear and Constant Envelope Modulation Techniques”. 1. In an M-ary signalling scheme two or more bits are grouped together to form a _______a) Chipb) Symbolc) Byted) Pattern 2. The number of possible signal in M-ary signalling is given by […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Constant Envelope Modulation”. 1. In constant envelope family of modulation, class C amplifiers introduces degradation in spectrum occupancy.a) Trueb) False 2. Constant envelope modulation techniques occupy ______ bandwidth than linear modulation schemes.a) Largerb) Smallerc) Samed) Twice 3. In non-linear modulation, […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Linear Modulation Techniques”. 1. Linear modulation techniques are not bandwidth efficient.a) Trueb) False 2. Which of the following is not a linear modulation technique?a) OQPSKb) π/4 QPSKc) FSKd) BPSK 3. In linear modulation technique __________ of transmitted signal varies linearly […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Pulse Shaping Techniques”. 1. ISI is ________ by increasing channel bandwidth.a) Maximizedb) Minimizedc) Zerod) Infinite 2. Why is pulse shaping technique used?a) To increase ISIb) To increase spectral width of modulated signalc) To reduce ISId) To reduce power spectral density […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Digital Modulation”. 1. Which of the following is not an advantage of digital modulation?a) Greater noise immunityb) Greater securityc) Easier multiplexingd) Less bandwidth requirement 2. A desirable modulation scheme provides _________ bit error rates at __________ received signal to noise […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Angle Modulation”. 1. FM is called constant envelope because ______ of carrier wave is kept constant.a) Frequencyb) Amplitudec) Phased) Angle 2. Which of the following are two most important classes of angle modulation?a) Amplitude modulation, frequency modulationb) Amplitude modulation, phase […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Amplitude Modulation”. 1. Modulation index of an AM signal is ratio of __________ to the _______a) Peak carrier amplitude, Peak message signal amplitudeb) Peak message signal amplitude, Peak carrier amplitudec) Carrier signal frequency, Message signal frequencyd) Message signal frequency, Carrier […]

This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Frequency Modulation Vs. Amplitude Modulation”. 1. The bandpass signal is called the modulating signal.a) Trueb) False 2. AM signal have all information in ______ of the carrier.a) Amplitudeb) Magnitudec) Frequencyd) Power 3. Which is the process of encoding information from […]