Faster handoffs B. Tracking b. c. Minimum time for change in magnitude and phase of the channel 1 and 2 are correct d. All the four are correct, 1. Send alphanumeric messages B. C. 1, 2 and 4 are correct A factor of power and gain of transmitter, 74)   Spread spectrum modulation involves, 1. Working of Adaptive Equalizers include, A. Spread spectrum technology B. D. Multiple users with coding techniques, A. B. b. b. LTP filter b. PN sequence at the decoder acts as a locally generated carrier at the receiver and decodes the signal using, A. Correlator B. B. Advantage of using Spread Spectrum modulation is/are, 1. Process of transferring the call to the new base station Equalizer algorithm b. The digital modulation technique used in frequency selective channels is, 83. More than one frequency hop during each symbol Addition of transmitted signal and impulse response Direct RF pulse system D. Different spectrum and same PN code, Ans:- Same spectrum and different PN code, 77. D. Both a and b 2. Effective Isotropic Radiated Power 2. 1, 2 and 3 are correct d. None of the above, 154)   The received signal from a multipath channel is expressed as, a. Convolution of transmitted signal and impulse response D. Amplitude, A. b. C. 2 and 3 are correct b. FDMA cellular systems 1 and 3 are correct Impulse response is time varying Multiple choice and open answer questions Try the multiple choice questions below to test your knowledge of this chapter. B. 2. Polarization of the wave B. A 15. The techniques used for small scale multipath measurements are, 1. C. Frequency allocation of nearest cells D. All of the above, 98. d. None of the above, a. Each user is assigned unique frequency slots 1, 2 and 3 are correct 4. Data Communication and Networking – Data and Signals multiple choice based questions and answers pdf cover the below lists of topic, 1. Different amplitudes A. B. More storage required B. C. Decreasing the S/N ratio at the antenna input 3. Spectrum Efficiency of a cellular network is, A. To eliminate the need of pulse shaping filter C. Full duplex mode ... fading, in particular Rayleigh fading and the pdf of received signal strength Doppler spread and rate of fading B. Multi transmission in one time slot, A. c. One or more symbols transmitted between frequency hops Interference rejection capability C. Hybrid access protocol D. Channel allocation for transmission, 100. C 13. 1 and 2 are correct Frequency non selective fading 2. The power received by the mobile station from other base station is more than the serving base station d. All of the above, ANSWER: Number of operations for one iteration of algorithm, 90)   The algorithms acquired for adaptive equalization are, 1. The serving base station requests for a channel from MSC Increased immunity to interference d. Multiplexers, 107)   In voice excited vocoders, PCM transmission helps in transmission of, a. d. Both a and b are correct Minimization of weighted mean square error D. None of the above, 30. C. The queue may be provided Random frequency modulation The privacy due to unique codes d. None of the above, 88)   The performance of algorithms for Adaptive Equalization are given by, 1. c. 2 and 3 are correct C. Flat fading b. Estimation of transmitted signal, correlator, demodulation, bit decision D. 300 KHz, 21. It is vulnerable to timing problems, A. Home » Mobile Communication Questions » 300+ TOP MOBILE COMMUNICATION Multiple Choice Questions & Answers, 1. You can answer the quiz questions by clicking on the "radio" buttons. b. B. CDMA/FDD d. Both a and b B. Receiver c. Modulation Propagation delays are eliminated Resistance to multipath fading C. 2 and 4 are correct D. None of the above, 19. d. 116 users, a. Wave is partially reflected and partially transmitted Fast fading D. Sampling, Envelope detection, multiplexing, encoding, Ans:- Envelope detection, sampling, encoding, multiplexing, 106. D. Directly proportional to twice of Doppler spread, Ans:- Directly proportional to Doppler spread, 145. C. Frequency selective fading b. Multiple carrier frequencies B. Waveform coders Uses large and small cells Signal fading due to Doppler shift in the channel d. All are correct, a. C. 32 users 38)   In Dynamic channel assignment, any channel which is being used in one cell can be reassigned simultaneously to another cell in the system at a reasonable distance. e. Both a and c, A. Transversal filter B. c. Voice message 1 and 3 are correct 3. C. Spectrum The performance of algorithms for Adaptive Equalization are given by, 1. 1, 2 and 3 are correct Low symbol rate and guard interval e. Both b and c, a. Fewer number of cells are required Ability of a user to access trunked system during busy hour Time required to attain a call with the busy base station Flat fading or frequency nonselective fading is a type of, A. Multipath delay spread small scale fading 2. B. D. All of the above, Ans:- Number of operations for one iteration of algorithm, 90. Smart antenna technology 1, 2 and 3 are correct c. 2 and 3 are correct Same spectrum and different PN code Rate of convergence Digital European Cellular Telex Equalizer algorithm d. Both a and c B. A question may or may not specify the number of choices to select. 2. 3. ISI is lesser, a. Fundamentals of mobile communication 4 MCQs with answers. C. Multiple pulses per period The power delay profile helps in determining, A. b. Welch window d. All four are correct, a. d. Sampling, Envelope detection, multiplexing, encoding, ANSWER: Envelope detection, sampling, encoding, multiplexing, 106)   Vocal tract cepstral coefficients and excitation coefficients are separated by, a. Samplers Wireless Communication Quiz Our quizzes are multiple choice questions. Resistance to multi path fading D. None of the above, 102. Cell size The user is blocked C. Subtraction of transmitted signal and impulse response c. Multiple pulses per period d. Qualcomm, ANSWER: Nippon Telephone and Telegraph (NTT), a. Simplex systems Polarization of the incident wave b. Different propagation delays 4G Multiple Choice questions and answers pdf free download for freshers experienced 4G faqs,Objective certification,Interview questions. 2. Training c. Digital modulation formats ElectronicsPost.com is a participant in the Amazon Services LLC Associates Program, and we get a commission on purchases made through our links. 1 and 2 are correct A 9. A 19. Commonly used mode for 3G networks is, 22. Diffraction, at high frequencies, depends upon, 1. 1 and 3 are correct 1 and 4 are correct c. Hopping rate greater than or equal to information symbol rate B. B. b. Speech Coders are categorized on the basis of, A. Blocking is reduced C or D 2. World’s first cellular system was developed by, A. Nippon Telephone and Telegraph (NTT) Advantage of using Dynamic channel assignment is, A. b. Obstacles B. Sectoring Distance between the transmitter and receiver, A. Angle of incidence of wave, A. For receiving calls Current signal sample is independent of past samples 4. A single, overall cost of capital is often used to evaluate projects because: a. b. Low frequency bands of speech 3. 3. The power received by the mobile station from other base station is more than the serving base station C. Galileo Galilei B. Vocoders 4. Multiple versions of signals are transmitted at different time instants b. d. Both a and b C. Yagi uda antennas Uses different antenna heights b. Adder Transfers the call Radio capacity may be increased in cellular concept by, A. Using same communication medium c. Expressed in Erlang /MHz /km2 1, 2 and 3 are correct 1.25 MHz Polarization diversity, A. Temporary failure of message transfer, a. Each cell is assigned a predetermined set of frequencies C. Dynamic channel assignment 4. D. Hamming window, 113. 4. Frequency modulation Polarization diversity, a. Its ability to frequency reuse, a. Suitable for noisy environments, 103)   The type of frequency domain coding that divides the speech signal into sub bands is, a. Waveform coding Small scale multipath propagation is caused due to waves with, 1. INFORMATION TECHNOLOGY QUESTIONS AND ANSWERS MULTIPLE CHOICE INSTRUCTION. b. Matched filter b. 4G mobile communication, 1. C. Same spectrum may be allocated to other network High frequency bands of speech C. Hand off C. 2 and 4 are correct Reflection b. In TD-SDMA, there is a frame of _____milliseconds and the frame is divided into _____ time slots. 4. C. Both a & b C. Communication in both directions at the same time The bandwidth of modulated signal B. C. Regular b. d. Frequency non selective fading, 149)   The power delay profile helps in determining, a. D. None of the above, 62. D. Both a and b are correct Strong destructive interference D. Both a and b d. Block transform coding, 105)   The steps involved in Channel vocoders for speech transmission are, a. d. All of the above, 36)   Advantage of using Dynamic channel assignment is, a. Geometry of the object D. All of the above, A. Transmitter e. Both a and b, 151. 3. 2 and 4 are correct 3. B. Learn daily practice multiple choice questions and answers for Data Communication and Computer Networks ebooks pdf free download. C. Low pass filter e. Both a and c are correct, A. D. All the three are correct, 72. Demand assignment is possible Week signal conditions These short objective type questions with answers are very important for Board exams as well as competitive exams. Easier handoff d. All of the above, a. It uses the maximum area for coverage Linear filters Time required for synchronization between the transmitter and the receiver c. AT&T Bell Laboratories Study these MCQ (Multiple Choice Questions) Questions and Answers on 1G network history and evolution which are useful for interviews and college exams of students. The modulation technique used for mobile communication systems during world war II was. Communication Systems Aptitude Questions and Answers. D. None of the above, 43. C. Multiple users on multiple channels at different time slots d. PLL, 114)   In GSM Codec, the bits encoded for forward error correction are, a. Ia bits The troubles that OFDM faces over other spread spectrum techniques are, 1. D. Both a and b c. Full duplex systems Sensitivity to Doppler shift b. Once you have completed the test, click on 'Submit Answers for Grading' to get your results. C. < 1 GHz b. Capacity of the system is increased C. Using different antennas The early FM push-to-talk telephone systems were used in, A. Simplex mode 4. Multiple user access d. All of the above. Several correlators The two common multiplexing techniques are FDM, which separates signals by modulating the data onto different carrier frequencies, and TDM, which separates signals by interleaving bits one after the other. 1 and 3 are correct 24. b. Waveform coders b. Transmitters of base stations 4. e. Both b and c are correct, 142. When a wave falls on a perfect conductor, A. Resistance to multipath fading Fixed 2. e. Both a and c, 1. Missed calls Increasing the number of base stations & reusing the channels Numerical properties In TDMA, the user occupies the whole bandwidth during transmission, A. 2. Half duplex system for communication has, A. Communication in single direction Coded sequence, a. d. < 2 GHz, 10)   Half duplex system for communication has, a. Communication in single direction No, at this stage it is one-way communication b. b. Multi channel per carrier 2. Same spectrum and different PN code B. Half duplex systems Amplitude of signal, 85. Zero forcing algorithm 2. B. The user is blocked Maximum radiated power available by the transmitter When mobile station moves in two cellular systems with different MSC Properties of the material at which reflection occurs One or more symbols transmitted in time interval between frequency hops c. The call gets blocked if all the channels of the cell are occupied Phase Amplitude, frequency, and phase Multiple Choice Question and Answer. The speech coders are selected on the basis of, 1. c. Signal to noise ratio d. Modulated signals, 108)   Linear predictive coders are based on the principle that, 1. Fundamentals of mobile communication - 1 - MCQs with answers 3G Cellular Networks Q1. Changes in signal strength 2. The speech sequence in GSM Codec consists of, A. Pre emphasis, segmentation, windowing, filtering Mobile Identification Number Each user is assigned unique frequency slots d. None of the above, 102)   Advantage of using waveform coders is, 1. D. None of the above, 154. Wide band digital communication C. Increase in spectrum B. B 20. B. Frequency change, 89)   Computational complexity of an algorithm refers to the, a. d. None of the above. Sensitivity to Doppler shift d. All of the above, a. TDMA Two calls in progress in nearby mobile stations Faster handoffs D. Both a and c are correct, Ans:- One or more symbols transmitted in time interval between frequency hops, A. D. Both a and b c. 1, 2 and 4 are correct C. 1, 2 and 3 are correct 2. CDMA2000 1xEV provides high speed data access with channel allocation of. Speech coding technique that is independent of the source is, A. Vocoders c. Power delay of the channel No reflection occurs at the first medium 2. 2. c. Transmitter and receiver Frequency band of the channel Reflection coefficient is zero c. Multiple users on multiple channels at different time slots b. Telecommunication Mcqs With Answers PDF Download. 4. B. D. None of the above, Ans:- Communication in single direction at a time, A. Interference in frequency bands may lead to, A. d. All the four are correct, 130)   The wide band usage in CDMA helps in, 1. Every user has assigned unique frequency slot C. Estimation of transmitted signal, demodulation, correlator, bit decision Time Recursive least squares algorithm, 91)   Fractionally spaced equalizer acts as, a. c. Galileo Galilei c. Small coherence time of the channel as compared to the delay constraints d. None of the above, ANSWER: Minimum time for change in magnitude and phase of the channel, a. b. Receiver B. Frequency domain channel sounding, Your email address will not be published. b. 3. c. New channel allocation is done Coherence Bandwidth of the channel is less than bandwidth of transmitted channel d. None of the above, 19)   The 2G GSM technology uses a carrier separation of, a. e. Both a and c, 115. Direct RF pulse system D. Demand access protocol, 140. c. Is used for high speed users with large coverage area and low speed users with small coverage area d. Both b and c B. Lattice filter c. Accommodating large number of users in limited spectrum 4. b. Bellcore and Motorola D. All of the above, 58. e. Both a and b, a. Accommodating large number of users in limited spectrum c. Low pass filter 3. C. Both a & b Free download in PDF Communication Multiple Choice Questions(MCQs) with Answers for competitive exams. b. The signal is transmitted using multiple channels Range of the time delays Gets blocked COMMUNICATION SYSTEMS Questions and Answers pdf free download for ece mcqs objective type interview questions lab viva manual GATE CAT syllabus Skip to content Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. D. All of the above, 42. Gets blocked C. Demodulator d. Both a and b 1 and 2 are correct The preamble contains Address of base station and subscribers, 1. c. 2 and 3 are correct 3. Impulse response in phase domain Obstacles C. Excess delay spread Linear filters The techniques used to improve the capacity of cellular systems are, A. Splitting c. 1 and 4 are correct 1 and 3 are correct 2. Unobstructed line of sight between the transmitter and receiver Which of the following is/are the main part(s) of basic cellular system. D 11. b. D. All of the above, Ans:- Assigning different group of channels, 26. c. Coverage zone approach b. D. None of the above. These are time domain vocoders c. Frequency divider - 2 Practice Multiple Choice Questions for Data Communication and Networking of computer awareness for SSC and banking exams. b. Omni directional antennas Signal compression techniques c. 2 and 3 are correct B. You can answer the quiz questions by clicking on the "radio" buttons. B. Addition of transmitted signal and impulse response Is a function of transmitting and receiving antenna gain c. MSC need not monitor the signal strength B. Blocking is reduced C. Envelope detection, encoding, sampling, multiplexing 4. d. None of the above, ANSWER: Increasing the number of base stations & reusing the channels, 27)   The shape of the cellular region for maximum radio coverage is, 28)   Hexagon shape is used for radio coverage for a cell because, a. a. Propagation along the ground surface, a. A. Amplitude modulation B. 1, 2 and 3 are correct Increased capacity C. Directly proportional to square of Doppler spread The 2G GSM technology uses a carrier separation of, A. e. Both b and c, a. ... questions and answers Sample/practice exam 2019, questions and answers Sample/practice exam 2019, questions and ... Business Communications (04 71 100) Get the App. Objects can communicate with each other through b. 35)   In a dynamic channel assignment strategy, a. c. Range of noise D. Both a and b are correct Zero forcing algorithm B. Number of bit errors during transmission 2. B. 1 and 2 are correct Polarization of the incident wave Drop in signal to noise ratio 1 and 2 are correct D. All the four are correct, 130. Temporary failure of message transfer, A. B. Limited spectrum is required b. Type of modulation technique used These short objective type questions with answers are very important for Board exams as well as competitive exams. B. Windowing, Pre emphasis, segmentation, filtering d. None of the above, ANSWER: Communication in single direction at a time, a. The small unused bandwidth between the frequency channels to avoid interference d. Channel allocation for transmission, 100)   PCM, DPCM, DM, ADPCM are the types of, a. Vocoders c. Increase in spectrum The windowing technique used for speech coding in GSM Codec is, A. Blackman window Cybernetic. Inaccuracies in the mathematical analysis The time span for which the equalizer converges depends upon, 1. 38. B. 1, 2 and 3 are correct C. Inputs and outputs of repeaters 1 and 4 are correct b. Process of transferring the call to the new base station C. Low earth orbit satellites c. Use of same time slot for different frequency channel D. All of the above, A. Sectored directional antennas name chapter 1--communicating in today's workplace description instructions modify add question here question multiple choice points modify remove question. c. < 1 GHz 2. D. All are correct, A. The privacy due to unique codes B. D. All of the above, A. TDMA 3. These Communication Objective Questions with Answers are important for competitive exams UGC NET, CAT, CMAT, GATE, IBPS Specialist Recruitment Test. Cheaper filters with less complicated logic functions Use of spatial locations of mobile units within the cell D. All of the above, A. e. Both a and c, 31. 3. d. All four are correct, 129)   CDMA is advantageous over other Spread Spectrum techniques for, 1. D. Both a and b D. None of the above, 88. c. Full duplex mode C. 1, 2 and 4 are correct 2)   ———– introduced Frequency Modulation for mobile communication systems in 1935. a. Edwin Armstrong C. Power delay of the channel The speech coding technique that is dependent on the prior knowledge of the signal is, A. Waveform coders d. None of the above, ANSWER: Multipath delay spread small scale fading, 147)   In Frequency Selective Fading, the, a. d. FSK. B. 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