2. An existing system uses noncoherent BASK. The application requires a BER of <10^-5. The currenttransmit power is 25 Watts. If the system changes to a coherent BPSK modulation scheme, what is thenew transmit power required to deliver the same BER?

Answered: Image /qna-images/answer/e96dd79f-5e54-41e4-aa3b-13ec84c9fd41.jpg

Answered: 2. An existing system uses noncoherent…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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41. Noise is typically narrow spikes of voltage with high frequencies.Group of answer choices True False 42. SCA signal can be transmitted at 67-kHz subcarrier.Group of answer choices True False 43. In FM, as the modulating signal amplitude increases, carrier frequency also increases proportionately.Group of answer choices True False 44. The greater the amplitude of the modulating signal, the higher the frequency deviation rate.Group of answer choices True False 45. With no modulation, the carrier frequency will shift above or below its normal frequency.Group of answer choices True False 46. The higher the frequency of the modulating signal, the greater the frequency deviation of the carrier signal.Group of answer choices True False
Explain why using double side band with suppressed carrier (DSB-SC) in a communication system is more power effificient than using double side band amplitude modulation (DSB-AM)
3. In an FM signal that modulating frequency is a 1.5-kHz sine wave. The carrier frequency is 1000 kHz. The frequencies of the third significant sidebands are ___ and ___ kHz.
A. How many numbers of constellation points exist in phase for 3bit ASK? B. What happens to the radio wave propagation when the frequency is below critical angle? C. If the mark frequency and space frequency are same then what happens to FSK? D. What is the Carson’s rule? E. What is the Maximum data rate in a minimum channel bandwidth is ? F. What is radio horizon and where is it used? G. What are the phase angle limitations of a BPSK? H. What is the change in channel capacity when two number of bits are increased?
2. An existing system uses noncoherent BASK. The application requires a BER of <10^-5. The current transmit power is 25 Watts. If the system changes to a coherent BPSK modulation scheme, what is the new transmit power required to deliver the same BER?
19. The _____________ gives a visual indication of system linearity and noise performance.A. spread spectrumB. pseudonoiseC. spectral regrowthD. constellation pattern
(1) A baseband PAM communication channel bandwidth is 100 KHz and has a noise power spectral density of 10^-9 W/Hz. The channel loss between the transmitter and receiver is 25dB. The application requires a bit rate of 500 Kbps and BER of less than 10^-5. The system uses raised cosine pulses with a roll-off factor of 0.25. Determine the minimum transmit power required. (2) Continuing problem 1. Everything for the previous problem stays the same BUT the best Power Amplifier you can afford has a maximum output power of 10 Watts. What will be estimated BER for the system?
State how the frequency of a carrier varies in an FM system when the modulating signal amplitude and frequency change.
A 162-MHz carrier is deviated by 12 kHz by a 2-kHz modulating signal. What is the modulation index?
Problem 6. Text Problem 2.3 (revised). Suppose for a certain FM system the demodulated SNR is 34 dB with a receiver threshold of 16 dB. The baseband signal has a 5 kHz bandwidth. The noise density level is No -110 dBW/Hz. =- a. Determine the FM index, 3. b. What RF bandwidth is needed for transmission for this system. c. Find the required received carrier power level.
1.) Answer the following: a. At 50% modulation DSBSC, what is the percentage power saving?b. At 75% modulation, what percentage of the total transmitted power is in the sideband?c. For conventional AM, the useful power, that is, the power that carries the information is rather small reaching a maximum of ______.Select the correct response:-One-fifth of the total signal power at 100% modulation-One-third of the total signal power at 100% modulation-One-fourth of the total signal power at 100% modulation-One-tenth of the total signal power at 100% modulation
6. The original electrical information signal to be transmitted is called * Modulating Signal Carrier Baseband Signal Source Signal 7. The Process of modifying a high frequency carrier with the information to be transmitted is called * Multiplexing Telemetry Detection Modulation

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2. An existing system uses noncoherent BASK. The application requires a BER of <10^-5. The current transmit power is 25 Watts. If the system changes to a coherent BPSK modulation scheme, what is the new transmit power required to deliver the same BER?