2) Two baseband signals m, (t) and m2(t) aré tó bé trânsmitted leously over a channel by multiplexing scheme shown below. (a) Sketch signal spectra at points Q R, S, T, U, V, Y. (b) How much the minimum bandwidth of the channel must be set to handle Y without distortion? (c) Design the required receivers to restore m, (t) and m2(t). M1(f) HPF R. f 5k m(t) fx=15kHz -5k 0 HPF Y 2 cos 2n15000t f=20kHz M2(f) LPF m,(t)- fx=15kHz T. -20k f 20k 2 cos 2n20000t

2) Two baseband signals m, (t) and m2(t) aré tó bé trânsmitted leously over a channel by multiplexing scheme shown below. (a) Sketch signal spectra at points Q R, S, T, U, V, Y. (b) How much the minimum bandwidth of the channel must be set to handle Y without distortion? (c) Design the required receivers to restore m, (t) and m2(t). M1(f) HPF R. f 5k m(t) fx=15kHz -5k 0 HPF Y 2 cos 2n15000t f=20kHz M2(f) LPF m,(t)- fx=15kHz T. -20k f 20k 2 cos 2n20000t

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...

See similar textbooks

Similar questions

A cellular service provider decides to use a digital TDMA scheme which can tolerate a signal- to-interference ratio of 15 dB in the worst case.i. Find the optimal value of N for the following scenarios:a) Omnidirectional antennas,b) 120° sectoring,c) 60° sectoring.ii. Should sectoring be used? If so, which case (60° or 120°) should be used? (Assume a path loss exponent of n = 4 and consider trunking efficiency.)
A cellular service provider decides to use a digital TDMA scheme which can tolerate a signal- to-interference ratio of 15 dB in the worst case. Find the optimal value of N for(a) omnidirectional antennas, (b) 120° sectoring, and (c) 60° sectoring. Should sectoring beused? If so, which case (60° or 120°) should be used? (Assume a path loss exponent of n=4and consider trunking efficiency.)
For an Armstrong indirect FM transmitter with the crystal carrier oscillating at 210 kHz, the crystal reference oscillating at 10.2 MHz, the sideband voltage is 0.018 V, the carrier input voltage to the combiner is 5V, the first and second multipliers are both 40, and the modulating signal frequency is 2 kHz, determine: a.) modulation index at the output of the combining network and the power amplifier; b.) frequency deviation at the same two points; and c.) the transmit carrier frequency.
Q1 ] A carrier signal ( peak amplitude = 39V , frequency = 100MHz ) frequency modulated by the baseband signal ( peak amplitude = 5V , bandwidth = 12.02kHz ) . The frequency deviation is 77.53kHz , and the load is 5112. Determine ( a ) the load power , ( b ) the bandwidth of the transmitted signal . ( consider only IJn ( $ ) > 0.1 ) .
Consider an AWGN channel with bandwidth 50 MHz, received signal power 10 mW, and noise density No (Noise Power/Bandwidth) = 10−9 W/Hz. (a) What is the information capacity (Mbps) in the system? (3 points, 2 decimal places); (b) By doubling the received power, What is the information capacity (Mbps) in the system? (3 points, 2 decimal places) (c) How much does the capacity (Mbps) by doubling the channel bandwidth? (3 points, 2 decimal places)
For an AM transmitter with an unmodulated carrier power of 100 W that is modulated that is modulated simultaneously by three modulating signals with coefficients of modulation of 0.2, 0.4 and 0.5. What is effective modulation index
A signal is transmitted separately with the same carrier and modulation index, respectively 1-width, 2-frequency and 3-phase modulation. In this case, which of the following is the relationship between the transmitted signals bandwidths correct?
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
1.Select the correct statement(s) regarding frequency modulation (FM) bandwidth. a. the more the carrier frequency is allowed to change frequencies (Δf), the smaller the modulated signal bandwidth b. the larger the FM index, β, the larger the modulated signal bandwidth c. as you increase kvco, you decrease modulated signal bandwidth d. all statements are correct 2. Select the correct statement(s) regarding baseband signal modulation. a. with modulation, a baseband signal can be moved to a higher frequency thus preventing baseband signal interference b. modulation techniques are only required for analog information signals, since digital signals are represented by discrete logical values of “1” and “0” c. modulation eliminates the baseband signal’s frequency bandwidth, thus enabling greater efficiencies when transmitting a modulated carrier signal d. all statements are correct 3. A…
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)…
Applying Amplitude Modulation Double Sideband Large Carrier (AM DSB-LC) results in a modulated carrier signal bandwidth approximately two times greater than the baseband signal bandwidth (fm). True False
(a) A certain city with a population of 1.2 million residents has an area of 1,800 km² and is covered by a cellular system using a 7-cell re-use pattern. Each cell has a radius of 4.5 km and the city is allocated 36 MHz of spectrum with full duplex channel bandwidth of 60 kHz. Assume a grade of service (GOS) or probability of blocking of 2 % for this system. If the offered traffic per user is 0.03 Erlangs, determine: (i)The total number of cells; (ii) the maximum carried traffic; (iii) the total number of users that can be served for 2% GOS; (iv) the market penetration of this cellular system. (v) the theoretical maximum number of users that could be served at one time by the system. What percentage of the subscribers is this value?