Q1: Choose one of the different choices indicated in the parenthesis such that the following sentences have correct meaning. a) The preemphasis and deemphasis used with FM modulated systems improves the (Transmission Bandwidth, Signal bandwidth reduction, Noise performance, Interference, Modulation index). b) A speech signal having a baseband bandwidth of 5 KHz is modulated and transmitted so that the transmission bandwidth required is 7 KHz. The type of modulation used is (DSB-SC, VSB, AM, FM, SSB). c) The modulation which needs the largest transmission bandwidth is (DSB-SC, SSB, AM, NBFM, WBFM).

Q1: Choose one of the different choices indicated in the parenthesis such that the following sentences have correct meaning. a) The preemphasis and deemphasis used with FM modulated systems improves the (Transmission Bandwidth, Signal bandwidth reduction, Noise performance, Interference, Modulation index). b) A speech signal having a baseband bandwidth of 5 KHz is modulated and transmitted so that the transmission bandwidth required is 7 KHz. The type of modulation used is (DSB-SC, VSB, AM, FM, SSB). c) The modulation which needs the largest transmission bandwidth is (DSB-SC, SSB, AM, NBFM, WBFM).

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

01: (A): What are the functional elements of the communication system, draw the block diagram and explain each sub-block. 01: (B): Calculate the power in one of the side band in SSB-SC modulation when the carrier power is 124W and there is 80% modulation depth in the amplitude modulated signal?
I need step-by-step solution. Thanks
23
In an AM modulator the message signal is m(t) = coswmit+2coswm2t, and the carrier wave is c(t) = Acosw.t. The modulation index is m = 0.5. a) Determine the amplitude of the carrier wave A. b) Determine the expression of the modulated signal with the AM modulation scheme. c) Determine the expression of the frequency spectrum of the AM modulated signal and then plot the frequency spectrum.
The figure shows the AM modulated signal. What is modulation index?
Example 1 20M₂ Amplitude of carrier signal is given 10 V, and freq? This carrier is modulated by 16 kHz signal and modulation index is 0.6. Devive the DSB-LC (Full AM) 2 terms And Sketch freq domain single Sided DSB -SC SSB (USB) SSB (LSB) - 3 terms
5-If the FM modulating signal is 300 kHz, and the carrier swing is 300 kHz. Therefore, the value and the type of the modulation index are, a) 0.5 NBFM b) 0.5 WBFM c) 1 NBFM d) 1 WBFM 6- IF the modulation index of FM signal is 2, the number of significant sidebands which greater than 1% of unmodulated carrier is? (Follow the table in the last page) a) 4 sidebands b) 6 sidebands c) 8 sidebands d) 10 sidebands 7- Let the carrier given 10cos(2nd) and the message signal be 5cos(10mt). Assume the message is used to frequency modulate the carrier with ky-10, the modulation index is, a) 1 b) 5 c) 10 d) 15
B. FM modulated signal is transmitted over a noisy transmitter modulator, with the power spectral density of noise being as shown in Figure 1 (W is the information frequency with 1 KHz, Sn (f) is the power spectral density for the noise). The FM equation and transmitter is shown in figure 2. 1. Derive the FM modulated signal for narrowband modulation 2. Determine the power of the narrowband FM modulation 3. Determine the signal to noise ratio for the narrowband FM modulation s4) - A, co 2f1 + 2n, mr dr 2 mk, Baseband signal Narrowband Integrator phase modulator Frequency maltiplier FM signal N4. Crystal- contralled oscillator Figure 1 Figure 2
For single sideband (SSB) modulation d) Explain with drawing the demodulation process of SSB signal.e) How many single sideband (SSB) stations can be accommodated in a 180 KHz bandwidth if the highest modulating signal frequency fmax is 9 KHz?f) What are the main advantages and disadvantages of single sideband (SSB) modulation compared with ordinary amplitude modulation (AM).
C- Put TRUE or FALSE for only TWO of the following and say why: 1. PCM modulation is very complex technique compared to DM. 2. Envelope detection for PSK signal is possible via using DPSK. 3. A frequency reuse factor can be reached to "1" as a maximum value.
.