Q. An AM/DSB-LC signal has a power of (S) watt, the maximum frequency of the baseband signal is (fmax) Hz, while the carrier frequency is (fc) Hz. If the additive noise power spectral density (two-sided) in the transmission channel is: Sn(w)=A/w^2 Given A=208 Fc=53244 Fmax=5754 S=26 * ?What is the upper sideband frequency value (1 - ?What is the lower sideband frequency value (2 ?What is the noise p ower value (3 * ?What is the SNR value (4

Q. An AM/DSB-LC signal has a power of (S) watt, the maximum frequency of the baseband signal is (fmax) Hz, while the carrier frequency is (fc) Hz. If the additive noise power spectral density (two-sided) in the transmission channel is: Sn(w)=A/w^2 Given A=208 Fc=53244 Fmax=5754 S=26 * ?What is the upper sideband frequency value (1 - ?What is the lower sideband frequency value (2 ?What is the noise p ower value (3 * ?What is the SNR value (4

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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Write the equation for the Power Spectral Density of the filtered signal ?
Use Carson’s rule to determine the bandwidth of an FM channel when the maximum deviation allowed is 5 kHz at frequencies up to 3.333 kHz. Sketch the spectrum, showing carrier and sideband values.
A given FM transmitter is modulated with a single sinusoid, the output for no load power is 100W into 50Ω resistive load. Then, the frequency of the modulating signal is carefully adjusted from zero until the modulated carrier encountered its zero amplitude as observed in spectrum analyzer. Under these conditions, determine the: (Use the provided Bessel table) a. the modulation index and the number of significant sideband b. total power on its significant sidebands. c. relative total power of the carrier and each of sideband. Ans. (a) Mf =2.4, N=5; (b) 99.86 W; b Pc=0W, P1=27.04W, P2=18.49W, P3=4W, P4=0.36W, P5=0.04W
An FM transmitter is determined to have a transmitter sensitivity of 498.716Hz/V. If the modulating signal is designed to be 15.998V, and the modulation index is kept to be at 1.5, solve for the highest upper sideband frequency in MHz considering that the carrier signal has a frequency equal to 172.255MHz.
Type your question here The modulating signal ?(?) = 2 cos 100 ?? + ??? 400?? is applied at the input of a DSB/ SC modulator operating at a carrier frequency of 1 ???. Sketch the spectral density of ?(?) and the resulting AM-DSB/SC waveform identifying the upper and lower sidebands.
1. Select the correct statement(s) regarding amplitude modulation (AM). a. If the AM Index is greater than 1 (i.e., µAM>1), then over modulation occurs leading to signal distortion b. With AM, the message is captured as amplitude changes to the carrier’s amplitude. c. The AM modulated carrier bandwidth is dependent upon the baseband signal’s frequency bandwidth d. All of the above are correct 2. What is true about the frequency bandwidth of a modulated electrical or electromagnetic (EM) signal? a. signal bandwidth is only determined by the frequency of the unmodulated carrier wave b. modulation technique and the amount of information transmitted determines the signal’s bandwidth c. only the baseband signal determines frequency bandwidth; i.e., modulation technique has no impact on bandwidth d. a and c are true 3.Regarding carrier modulation, identify the carrier signal variable(s)…
5. The following data is available: fc= carrier frequency = 750kHz, Ac= maximum amplitude of the unmodulated carrier = 10V fm= modulator frequency = 300Hz-8kHz modulation index m=0.5 a) What is the frequency of the upper sideband? b) What is the frequency of the lower sideband? c) What is the amplitude of the modulating signal? d) What is the maximum amplitude of the envelope of the modulated signal? e) What is the minimum amplitude of the envelope of the modulated signal? f) What is the bandwidth of the modulated wave? g) Write an expression for the modulated wave
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4. short answers a. What is the effective antenna area of an antenna at 2500 MHz, if the gain is 13 dBi. b. For a WCDMA handset with 7 dB noise figure and 5 MHz effective noise bandwidth, calculate the noise floor in dBm. c. An NBA basketball player is close to 2 meters tall, and an “Umpa-Lumpa” from the movie “Willie Wonka” is 0.5 meters tall. Assuming 2-ray propagation model, what is the ratio of the signal strength received by the two people? d. Consider a 12-km microwave link with 15 meter towers at both ends, calculate the minimum frequency in GHz, such the first Fresnel zone does not intersect the ground? Assume that the ground is flat between the towers.
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A given FM transmitter is modulated with a single sinusoid, the output for no load power is 100W into50Ω resistive load. Then, the frequency of the modulating signal is carefully adjusted from zero untilthe modulated carrier encountered its zero amplitude as observed in spectrum analyzer. Under theseconditions, determine the: (Use the provided Bessel table)a. the modulation index and the number of significant sideband. b. total power on its significant sidebands. c. relative total power of the carrier and each of sideband. Ans. (a) Mf =2.4, N=5; (b) 99.86 W; b Pc=0W, P1=27.04W, P2=18.49W, P3=4W,
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