Consider a message signal m(t) with bandwidth W = 5.86 kHz. This signal is applied to...

Consider a message signal m(t) with bandwidth W = 5.86 kHz. This signal is applied to a product modulator, together with a carrier wave c _t = cos(210000πt) producing the DSB-SC modulated wave s(t). This modulated wave is next applied to a coherent detector producing an output signal y(t). The coherent detector consists of a product modulator that multiplies s(t) by c _r = 2cos(222000πt) and a low pass filter which has a cut off frequency 21 kHz. The output of the coherent detector y(t) would be

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Manojponduru answered 2 years ago

A normalized message signal has a bandwidth of W = 10 KHz and a power of...

A normalized message signal has a bandwidth of W = 10 KHz and a power of Pm= 0.75 . It is required to transmit this signal via a channel with an available bandwidth of 80 KHz and attenuation of 50 dB. The channel noise is additive and white with a power-spectral density of N0/2 = 10^(-10) watts/Hz. A frequency-modulation scheme, with no pre-emphasis/de-emphasis filtering, has been proposed for this purpose. 1. If it is desirable to have an SNR of...

Consider an AM modulator with the followings: the message signal is m(t)= 0.5 cos (2πfmt), the...

Consider an AM modulator with the followings: the message signal is m(t)= 0.5 cos (2πfmt), the carrier signal frequency is 200kHz, the carrier signal amplitude is unity, the amplitude sensitivity is 1.6. Which one is the power of the lower side-band ?

A communication network has a bandwidth of 10 kHz. Calculate the signal-to-noise ratio in dB if...

A communication network has a bandwidth of 10 kHz. Calculate the signal-to-noise ratio in dB if the capacity of the channel for a 100Kbps [2 Marks] ii. A communications channel with a bandwidth of 4kHz has a signal power to noise ratio of 7. Determine the Channel Capacity. [2 Marks] ii. The bandwidth in b above is reduced by 25%. How much should the signal power be increased to maintain the same channel capacity?

Generate a baseband message signal m(t) to be a square waveform of duration 120 msec and...

Generate a baseband message signal m(t) to be a square waveform of duration 120 msec and amplitude 1 V. The sampling frequency is - = 10 . Use a carrier of amplitude 1 and frequency 600 Hz and perform the following modulation/demodulation operations: 1. DSB-SC a. modulation of the message signal m(t) b. coherent demodulation, assuming that the local carrier @ the receive-side is perfectly synchronized in frequency and phase with the transmit-side carrier. c. lowpass filtering of the demodulated...

m = 3sin(5pit)-sin(40pit)+5cos(10pit) a)What is the bandwidth of the message? b)What should be the minimum cut-off...

m = 3sin(5*pi*t)-sin(40*pi*t)+5cos(10*pi*t) a)What is the bandwidth of the message? b)What should be the minimum cut-off frequency of the LPF (BWmin)? Why? What will you observe, when you choose value of BW smaller than BWmin? c)What should be the maximum cut-off frequency of the LPF (BWmax)? Why? What will you observe, when you choose value of BW higher than BWmax? d)What is the ideal sampling rate? Why? e)What is the ideal cut-off frequency of the LPF(Low Pass Filter)? Why?

DSB: Write the code for an m-file (script) to generate a DSB signal. The modulating (message)...

DSB: Write the code for an m-file (script) to generate a DSB signal. The modulating (message) signal is a single tone signal with frequency 1kHz and the carrier frequency is 30kHz. Time Vector: 3001 points over range from 0 to 3ms (3 cycles of the modulating signal). Plot your original message signal both in time and its spectrum. (Note: use the cosine functions for your signals). In your report you should include the plots for the modulated signal in time...

consider the subspace W=span[(4,-2,1)^T,(2,0,3)^T,(2,-4,-7)^T] Find A) basis of W B) Dimension of W C) is vector...

consider the subspace W=span[(4,-2,1)^T,(2,0,3)^T,(2,-4,-7)^T] Find A) basis of W B) Dimension of W C) is vector v=[0,-2,-5]^T contained in W? if yes espress as linear combantion

7 If a carrier signal vc(t) = 10 sin (20000πt+π/2) volts is amplitude modulated by message...

7 If a carrier signal vc(t) = 10 sin (20000πt+π/2) volts is amplitude modulated by message vm(t) = 8sin(450πt+π/2), sketch the frequency plot for the resulting AM signal and calculate the transmission bandwidth. Write the expression for the AM signal. If the resulting AM signal is viewed on a CRO, what will be the values of Vmax and Vmin? Also sketch the AM signal in CRO and state whether the signal is under modulated / critically modulated / over modulated;...

Problem 3: The carrier c(t) = 100cos(2p fct) is frequency modulated by the signal m(t) =...

Problem 3: The carrier c(t) = 100cos(2p fct) is frequency modulated by the signal m(t) = 5cos(20000pt) , where fc = 108 Hz. The peak frequency deviation is 20 kHz. Determine the amplitude and frequency of all the signal components that have a power level of at least 10% of the power of the un-modulated carrier component. Hint: The wide-band FM has frequency components, fc, fc+ fm, fc? fm, fc+2 fm, fc?2 fm, and so on. The amplitude of the...

Please solve on MATLAB: Consider the signal x(t) = 2−tu(t), where u(t) is the unit step...

***Please solve on MATLAB:*** Consider the signal x(t) = 2−tu(t), where u(t) is the unit step function. a) Plot x(t) over (−1 ≤ t ≤ 1). b) Plot 0.5x(1 − 2t) over (−1 ≤ t ≤ 1).

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