Q1. An analog signal has a 4 kHz bandwidth. The signal is sampled at 2.5 times the Nyquistrate and each sample is quantized into one of 256 levels. The quantized samples are thenencoded and sent over a baseband AWGN channel.(a) Find the data rate of the transmitted PCM signal.(b) Can the data be transmitted without errors over the communication channel if thechannel bandwidth is 40 kHz and its SNR is 23 dB?(c) What will be the bandwidth requirements of the channel for transmitting the output ofthe PCM system without errors if the SNR is 10 dB?

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Answered: Q1. An analog signal has a 4 kHz…

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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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…
In FM modulation, the magnitude and direction of the frequency shift  is proportional to the amplitude and polarity of the modulating signal.Thus, the general expression of any base-band signal frequency modulated onto a carrier
A 450 kHz carrier signal is modulated with a 15 kHz modulating signal. What are its sideband frequencies?
What is the period and frequency of this signal? Is the frequency constant?What is the bit rate of a given signal?What is the baud rate of a given signal?
After an analog signal is sampled at 15 kHz, it is converted into digital form by quantitating at 64 levels. Since unipolar rectangular pulses with 50% occupancy-void ratio are used to transmit the signal from the baseband, what is the required bandwidth for transmission?
sketch two waveforms of an FM signal showing the effect of different modulation index.
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 ) .
In AM modulation, the equation of the modulating signal is given by f(t) = Am cos ωm t. If the amplitude of the carrier wave is A and there is no over–modulation, then what will be the modulation efficiency?
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)…
An Amplitude Modulation (AM DSBFC) radio broadcasting station with its carrier frequency of 750 kHz is amplitude-modulated by a 4 kHz audio signal to produce an AM envelope. The maximum and minimum peaks voltages of the envelope are 180Vp and 70Vp respectively. The equivalent resistance of the transmitting antenna is 60 Ω. Determine: (i) The peak amplitudes of the audio, carrier sideband voltages and modulation index. (ii) Using the above results, write the complete AM mathematical representation to express the waveform, showing its carrier, lower sideband and upper sideband parameters. (iii) The power of the carrier signal, total sidebands power and the bandwidth of the modulated signal. Then sketch and label the power spectrum of the modulated ( i v ) If the transmission is changed to Single-Side Band Suppressed Carrier (SSBSC), calculate the percentage power saving in comparison to the original AM DSBFC
An analog signal is given as?(?) = 5 + 2 cos(20??) + 3 cos(400??)a) What is the bandwidth of ?(?)? Determine the Nyquist sampling frequency for ?(?), both in radian/sec (?? ), and in Hz (?? ).b) Formulate ?? (??), the signal sampled with the Nyquist frequency.c) Plot frequency spectrum of the sampled signal, ?? (??).d) Determine the filter to reconstruct the signal ?(?).e) Is it possible to reconstruct the signal ?(?) for ?? = 0.004 [s]? State that if aliasing error occurs or not.
In Amplitude modulation, Vestigal Side Band (VSB) is one of the technique used to overcome its limitations in terms of power and bandwidth. With this in mind; a. Explain how a VSB signal is generated in the transmitter. b. Draw and compare the frequency spectrum of the original message signal and the spectrum of the VSB signal in a frequency domain. c. Show how the bandwidth of VSB is calculated by writing the equation. d. Give one application of VSB in broadcasting.

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