Explain how each signal 1 -3 can be demodulated. and Refer to Frequency Division Multiplexing, using a...
Explain how each signal 1 -3 can be demodulated. and Refer to Frequency Division Multiplexing, using a half circle to represent Signal-1 frequency spectrum, a rectangular for Signal-2 spectrum, and a triangle for Signal-3 spectrum. To show the frequency spectrum after each modulator, frequency spectrum over the channel, and frequency spectrum after each demodulator.
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Explain how each signal 1 -3 can be demodulated.
and Refer to Frequency Division Multiplexing, using a...
Problem 3: Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM) [20 points) a) Assuming you...
Problem 3: Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM) [20 points) a) Assuming you have 4 frequency bands to transmit using FDM Design a logic circuit to perform this function. You are being asked to design a logic circuit represented by the block diagram below, start with a truth table Ch1 Ch2 4:1 Mux Output Band Ch3 Ch4 The above block diagram is generic and can be used for time division multiplexing (TDM) with inputs TI, T2, T3...
a. In FM transmission circuits, explain the purpose and function of: i. Pre-emphasis and de-emphasis circuits....
a. In FM transmission circuits, explain the purpose and function of: i. Pre-emphasis and de-emphasis circuits. (CO1: PO1 - 3 Marks) ii. Limiter circuit. (CO1: P01 - 3 Marks) b. A sinusoidal carrier wave of frequency fe = 110 MHz is modulated by a modulating signal m(t). The characteristics of the modulating signal is illustrated in Figure Q2(b) and the Frequency Deviation Constant of the FM Modulator, kf = 107 Hz/volt. Determine the minimum bandwidth required for transmission of the...
Question 4 (35 points). Two message signals, ?1 (?) = 200??(100??) cos(103πt) volts and ?2 (?)...
Question 4 (35 points). Two message signals, ?1 (?) =
200??(100??) cos(103πt) volts and ?2 (?) = 900??2 (450??)
cos(103πt) volts, are required to be combined and then transmitted
over a channel around 2 MHz using amplitude double-side modulation.
We assume that the channel is ideal with no delay and no
attenuation. Design a system consisting of mixers, filters, etc. to
transmit and restore perfectly these two signals (i.e. ?1 (?) and
?2 (?)) at the receiving side after the...
Make sure you show all working and describe each step in your calculations. 1. A signum function ...
signals and communications 2
Make sure you show all working and describe each step in your calculations. 1. A signum function is defined as sgn(t) = { 1、12 0 1 t<0 Plot and express this function in terms of the unit-step function. 5 marks/ Determine and plot the even and odd parts of the signal 2. x(t) (te-3 +2)u(t). 5 marks 3. If prove that y[n-m] = x[n-m] * h[n]. 5 marks 4. Assuming α > 0, plot the signal...
Please do Part 4 and Show all work! 1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure b...
Please do Part 4 and Show all work!
1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure by using frequency discriminator. Assume no attenuation of the signal due to propagation loss (in other words assume amplifiers properly restored the amplitude of the transmitted signal at the receiver) [10 points] Find the Fourier Series (trigonometric Fourier Series) of the message signal m (t) where To...
1) Given that the frequency deviation constant &t is 5 kHz/volt, what is the required amplitude o...
1) Given that the frequency deviation constant &t is 5 kHz/volt, what is the required amplitude of the modulating signal such that Jo(β value of B for this case? Note in 2kHz. 0? What is the What are the values of the Bessel Coeficients when Jo(8-0 ? 1.e. the first five sidebands. Plot the spectrum assuming that the unmodulated carrier has an amplitude of 2V State Carson's rule for banaiwidth estimation What does it reduce to for NBFM and WBFM?...
5. (3 marks) Explain how two or more radio stations can transmit over the same airspace...
5. (3 marks) Explain how two or more radio stations can transmit over the same airspace (channel). 6. (10 marks) You are given a channel of transmission bandwidth 5 kHz, over which you must transmit a 6.25 kb/s data stream using baseband 2-ASK. For a raised-cosine pulse shape: (a) Calculate the maximum possible roll-off factor that can be used. (b) Calculate the f1 frequency. (c) Calculate the excess bandwidth. (d) Sketch and label the spectrum of the raised-cosine filter.
can someone help me do this and maybe also the picture of the scope explain how you get it. thankyou! Frequency-sh...
can someone help me do this and maybe also the picture of the
scope explain how you get it. thankyou!
Frequency-shift keying (FSK) and Phase-shift keying (PSK) Two other modulation schemes are the phase-shift keying (PSK) and the frequency-shift keying (FSK). These are illustrated in Figure 8 b and c respectively. In phase-shift keying the carrier signal changes phase by a radians when the digital signal changes values. In frequency-shift keying a 0 is transmitted at a different carrier frequency...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA FM radio broadcasting utilizes the frequency band A. 0.665 MHz-1.6 MHz B. 80 MHz - 100 MHz C. 88 MHz 108 MHz 2. The pre-emphasis is generally used A. to improve the demodulator performance in the presence of noise in the received signal B. to improve the modulator performance C. to improve the stereophonic effect 3. The intermediate frequency of FM superheterodyne receiver is...
1-3(l mark) Explain the operation of the multi channel analyser (MCA). 1-4 mark) How can an...
1-3(l mark) Explain the operation of the multi channel analyser (MCA). 1-4 mark) How can an SCA be used to produce a spectrum and what advantage docs an SCA have over an MCA for direct counting? advantage for dircet counting?a
Problem 3: Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM) [20 points) a) Assuming you have 4 frequency bands to transmit using FDM Design a logic circuit to perform this function. You are being asked to design a logic circuit represented by the block diagram below, start with a truth table Ch1 Ch2 4:1 Mux Output Band Ch3 Ch4 The above block diagram is generic and can be used for time division multiplexing (TDM) with inputs TI, T2, T3...
a. In FM transmission circuits, explain the purpose and function of: i. Pre-emphasis and de-emphasis circuits. (CO1: PO1 - 3 Marks) ii. Limiter circuit. (CO1: P01 - 3 Marks) b. A sinusoidal carrier wave of frequency fe = 110 MHz is modulated by a modulating signal m(t). The characteristics of the modulating signal is illustrated in Figure Q2(b) and the Frequency Deviation Constant of the FM Modulator, kf = 107 Hz/volt. Determine the minimum bandwidth required for transmission of the...
Question 4 (35 points). Two message signals, ?1 (?) =
200??(100??) cos(103πt) volts and ?2 (?) = 900??2 (450??)
cos(103πt) volts, are required to be combined and then transmitted
over a channel around 2 MHz using amplitude double-side modulation.
We assume that the channel is ideal with no delay and no
attenuation. Design a system consisting of mixers, filters, etc. to
transmit and restore perfectly these two signals (i.e. ?1 (?) and
?2 (?)) at the receiving side after the...
signals and communications 2
Make sure you show all working and describe each step in your calculations. 1. A signum function is defined as sgn(t) = { 1、12 0 1 t<0 Plot and express this function in terms of the unit-step function. 5 marks/ Determine and plot the even and odd parts of the signal 2. x(t) (te-3 +2)u(t). 5 marks 3. If prove that y[n-m] = x[n-m] * h[n]. 5 marks 4. Assuming α > 0, plot the signal...
Please do Part 4 and Show all work!
1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure by using frequency discriminator. Assume no attenuation of the signal due to propagation loss (in other words assume amplifiers properly restored the amplitude of the transmitted signal at the receiver) [10 points] Find the Fourier Series (trigonometric Fourier Series) of the message signal m (t) where To...
1) Given that the frequency deviation constant &t is 5 kHz/volt, what is the required amplitude of the modulating signal such that Jo(β value of B for this case? Note in 2kHz. 0? What is the What are the values of the Bessel Coeficients when Jo(8-0 ? 1.e. the first five sidebands. Plot the spectrum assuming that the unmodulated carrier has an amplitude of 2V State Carson's rule for banaiwidth estimation What does it reduce to for NBFM and WBFM?...
5. (3 marks) Explain how two or more radio stations can transmit over the same airspace (channel). 6. (10 marks) You are given a channel of transmission bandwidth 5 kHz, over which you must transmit a 6.25 kb/s data stream using baseband 2-ASK. For a raised-cosine pulse shape: (a) Calculate the maximum possible roll-off factor that can be used. (b) Calculate the f1 frequency. (c) Calculate the excess bandwidth. (d) Sketch and label the spectrum of the raised-cosine filter.
can someone help me do this and maybe also the picture of the
scope explain how you get it. thankyou!
Frequency-shift keying (FSK) and Phase-shift keying (PSK) Two other modulation schemes are the phase-shift keying (PSK) and the frequency-shift keying (FSK). These are illustrated in Figure 8 b and c respectively. In phase-shift keying the carrier signal changes phase by a radians when the digital signal changes values. In frequency-shift keying a 0 is transmitted at a different carrier frequency...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA FM radio broadcasting utilizes the frequency band A. 0.665 MHz-1.6 MHz B. 80 MHz - 100 MHz C. 88 MHz 108 MHz 2. The pre-emphasis is generally used A. to improve the demodulator performance in the presence of noise in the received signal B. to improve the modulator performance C. to improve the stereophonic effect 3. The intermediate frequency of FM superheterodyne receiver is...
1-3(l mark) Explain the operation of the multi channel analyser (MCA). 1-4 mark) How can an SCA be used to produce a spectrum and what advantage docs an SCA have over an MCA for direct counting? advantage for dircet counting?a
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