d. None of the above, 30)   Spectrum Efficiency of a cellular network is, a. Maximum radiated power available by the transmitter b. 2. The Linear Equalizer may be implemented as, A. Single user on multiple channels as per demand 3. Coded sequence, a. d. 300 KHz, 21)   Commonly used mode for 3G networks is, 22)   The minimum spectrum allocation required for W-CDMA is, 23)   CDMA2000 1xEV provides high speed data access with channel allocation of. Several sub receivers Frequency diversity C. Hybrid access protocol Two base stations operating in same frequency band Increased capacity b. D. All of the above, 98. 1.25 MHz C. 2 and 4 are correct c. Signal to noise ratio e. Both a and c, 1. D. All of the above, 52. d. SDMA cellular systems, 126)   TDMA is employed with a TDMA frame that has preamble. Once you have completed the test, click on 'Submit Answers for Grading' to get your results. Which of the following is/are the main part(s) of basic cellular system. C 16. INFORMATION TECHNOLOGY QUESTIONS AND ANSWERS MULTIPLE CHOICE INSTRUCTION. d. None of the above, 12)   The process of transferring a mobile station from one base station to another is, a. MSC d. Amplitude, a. The preamble contains Address of base station and subscribers, 1. d. High speed users with large coverage area, ANSWER: Ability of a user to access trunked system during busy hour, a. Erlangs /MHz /km2 Independent of the signal source b. B. CDMA/FDD e. Both a and b, A. Accommodating large number of users in limited spectrum Speech coders Learn daily practice multiple choice questions and answers for Data Communication and Computer Networks ebooks pdf free download. B. Refraction Why are waves with a very low frequency not used for data transmission in computer networks? d. All four are correct, 121)   The advantages of FDMA over TDMA includes, 1. D. None of the above, 9. Phase C. Large spectrum required B. Tracking C. MSC need not monitor the signal strength b. At ElectronicsPost.com I pursue my love for teaching. Division is simpler C. Encoders 4. 3. d. None of the above, 62)   Fresnel Reflection Coefficient is a factor of, 1. Advantage of using Dynamic channel assignment is, A. < 100 MHz Time diversity Pitch detection is not required The small unused bandwidth between the frequency channels to avoid interference 1 and 2 are correct In voice excited vocoders, PCM transmission helps in transmission of, A. C. Noise produced during one complete iteration of algorithm C. Frequency allocation of nearest cells A single, overall cost of capital is often used to evaluate projects because: a. The speech coders are selected on the basis of, 1. Week signal conditions c. Dynamic channel assignment B. 1 and 3 are correct d. All of the above, 46)   In Mobile Assisted Handoff (MAHO), the handoff takes place when, a. b. INFORMATION TECHNOLOGY QUESTIONS AND ANSWERS … PDF File: Information Technology Questions And Answers Multiple Choice – PDF-ITQAAMC-15LIOM-9 4/4. B. Frequency band of the channel 4. D. None of the above, A. c. Estimation of transmitted signal, demodulation, correlator, bit decision Sampling, Envelope detection, encoding, multiplexing Satellite communication systems and Microwave line of sight radio links Several sub receivers b. d. All of the above, 34)   In a fixed channel assignment strategy, a. B. These topics are chosen from a collection of most authoritative and best reference books on Wireless & Mobile Communications. Pitch detection is not required 4. A They require large antennas, have lower bandwidth and are difficult to manage in cells and frequency reuse schemes X B They require small antennas and have higher bandwidth C. 1 and 4 are correct A. Amplitude modulation B. Company. 2. D. None of the above, Ans:- Multipath delay spread small scale fading, A. 2. A. IEEE 802.11 B. 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. < 2 GHz, 10)   Half duplex system for communication has, a. Communication in single direction Is a function of transmitting and receiving antenna gain Several correlators The received signal at the GSM speech decoder is passed through, A. STP filter C. 2 and 3 are correct c. Is kept on waiting Increases with square of the distance between the transmitter and receiver The power received by the mobile station from other base station is more than the serving base station Limited spectrum is required Obstacles b. Communication in single direction at a time D. Receivers of mobile stations, A. d. Multiple users with coding techniques, a. d. Modulated signals, 108)   Linear predictive coders are based on the principle that, 1. C. Both a & b Depends upon the distance between transmitting and receiving antenna, 71. Effective Isotropic Radiated Power c. Channel that passes all spectral components with linear phase 1, 2 and 3 are correct b. Estimation of transmitted signal, correlator, demodulation, bit decision Different spectrum allocation in different time slots, a. Linear filters Wireless Communication Quiz Our quizzes are multiple choice questions. B 17. Different propagation delays Mobile radio channel may be modeled as linear filter C. Inputs and outputs of repeaters c. Transmitter and receiver 3. Process of transferring the call to the new base station 1 and 2 are correct Mobile Identification Number d. None of the above, 17)   2G CDMA standard – cdma one supports up to, a. 3. d. All of the above, a. TDMA 3. c. The queue may be provided Flat fading or frequency nonselective fading is a type of, A. Multipath delay spread small scale fading The call is served by unused channels of the cell 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. 2. 2. Drop in signal to noise ratio Several correlators 1 and 4 are correct 2. 24)   In TD-SDMA, there is a frame of _____milliseconds and the frame is divided into _____ time slots. 1, 2 and 3 are correct c. One or more symbols transmitted between frequency hops Frequency variations at the source Each user has unique PN code, a. Speech coders d. PLL, 114)   In GSM Codec, the bits encoded for forward error correction are, a. Ia bits 3. These Communication Objective Questions with Answers are important for competitive exams UGC NET, CAT, CMAT, GATE, IBPS Specialist Recruitment Test. B. Waveform coders Providing Guard channel 3. b. D. Both a and b B. Roamer a. B. Lattice filter Time-domain graph plots Multiple Choice Question and Answer. c. AT&T Bell Laboratories Cross talk B. c. Transceiver The algorithms acquired for adaptive equalization are, 1. e. All a, b and c are correct, 92. D. All of the above, A. Transfers the call When mobile station moves in two cellular systems with different MSC c. Frequency selective fading 2. c. Both a & b Coherence Bandwidth of the channel is less than bandwidth of transmitted channel Interference rejection capability To eliminate the need of pulse shaping filter C. Low co-channel interference 4. Frequency domain channel sounding, Your email address will not be published. Received power falls with square of the distance between the transmitter and receiver Reduced spectral efficiency 1 and 3 are correct Increased capacity b. Different phase, 152. c. 2 and 3 are correct When a fraction of assigned channel is reserved for handoffs, it is, A. B. D. All of the above, 46. Hexagon shape is used for radio coverage for a cell because, A. Multiple users occupy different spectrum at a time, 1. The traffic carried per cell divided by the bandwidth of the system and the area of a cell C. Voice message B. 4. B. Decreasing the strength of antenna 3. MCQ quiz on Mobile Communication multiple choice questions and answers on Mobile Communication MCQ questions on Mobile Communication objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams Page 9 C. Blocked calls B. B. 3. C. High symbol rate D. All of the above, 101. The modulation technique used for mobile communication systems during world war II was. d. Frequency selective fading, 146)   Flat fading or frequency nonselective fading is a type of, a. Multipath delay spread small scale fading Multi path propagation b. Doppler spread small scale fading Equalizer structure 3. You will get 1 point for each correct answer. 2. Low efficiency due to guard intervals, 136)   The guard interval is provided in OFDM, a. name chapter 1--communicating in today's workplace description instructions modify add question here question multiple choice points modify remove question. The channel allocated is not available (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. Resistance to multipath fading d. All of the above, a. Transmitter c. Maximum Likelihood Sequence Estimation, a. 3. Dynamic c. Coverage zone approach Low spectral efficiency These short objective type questions with answers are very important for Board exams as well as competitive exams. d. All of the above, ANSWER: Accommodating large number of users in limited spectrum, 49)   When all of the radio channels are in use in a trunking system, a. First Generation Mobile Network or simply 1G Network allowed mobile or cellular telephony with mobility across states and countries. Multiple users, 75. C. When mobile station receives more power from other base station than the serving base station D. All of the above, A. Radius of the cell Uses different antenna heights D. None of the above, A. C. Pre emphasis, windowing, segmentation, filtering Easier handoff Multi path propagation Distance between the transmitter and receiver, A. c. 2 and 4 are correct 4. D. All of the above, 156. 3. c. Full duplex systems C. 2 and 4 are correct 1 and 2 are correct 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. Every user has assigned unique frequency slot The early FM push-to-talk telephone systems were used in, A. Simplex mode When all of the radio channels are in use in a trunking system, A. D. Both a and b B. C. Low pass filter They are among low bit rate vocoders, A. 2. 3. Increase in radio spectrum Obstacles b. b. Hopping rate greater than or equal to information symbol rate c. Use of same time slot for different frequency channel Resistance to multipath fading Polarization of the incident wave Radio capacity may be increased in cellular concept by, A. Mobile Assisted Handoff (MAHO) provides, A. 3. 1 and 4 are correct d. dB/sec, 57)   The techniques used to improve the capacity of cellular systems are, a. Splitting 3. Frequency allotted Polarization of the wave B. d. All of the above, a. Use of spatial locations of mobile units within the cell C. Different spectrum and different PN code 3. 3. c. Blocked calls 2. Cross talk b. Lattice filter 2. C. Hand off c. Multiple users on multiple channels at different time slots Coherence Bandwidth of the channel is more than bandwidth of transmitted channel B. More than one frequency hop during each symbol The increase in number of users in PURE ALOHA causes, A. 4. b. b. Matched filter Data and signal Multiple Choice Question and Answer. Temporary failure of message transfer, A. 4. C. Signal to noise ratio Fresnel Reflection Coefficient is a factor of, 1. e. Both a and c, 1. ... fading, in particular Rayleigh fading and the pdf of received signal strength Doppler spread and rate of fading d. All are correct, a. Multiple choice questions have four possible answers. The speech sequence in GSM Codec consists of, A. Pre emphasis, segmentation, windowing, filtering A & b D. None of the location of the above, 14, encoding, multiplexing.... Channel that passes All spectral components with equal gain b and analysis is increased C. Both a b. 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