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When the additive noise at the input to the demodulator is colored, the filter matched to the signal no longer maximizes the output SNR. In such a case, we may consider the use of a prefilter that "whitens" the colored noise. The prefilter is followed by a filter matched to the prefiltered signal. Toward this end, consider the configuration shown in Figure P-10.10.
1. Determine the frequency-response characteristic of the prefilter that whitens the noise.
2. Determine the frequency-response characteristic of the filter matched to s(t).
3. Consider the prefilter and the matched filter as a single "generalized matched filter." What is the frequency-response characteristic of this filter?
4. Determine the SNR at the input to the detector.
A consumer products company is formulating a new shampoo and is interested in foam height (in mm). Foam height is approximately normally distributed and has a standard deviation of 20 mm. The company wishes to test H0 : l = 175 mm
A three-phase load is Y-connected. The load has a phase voltage of 139 V and a phase current of 49 A. Each phase of the load consumes 5.1 kW of power. (A) Sketch and label the load. Find (b) the line voltage, (c) the line current, and
digital communication techniques a video signal contains light variations that change at a frequency as high as 3.5
The internal operation of the ADC is such that all code widths are equal. Also, the input digital signal is formatted using a unsigned binary number representation. List all possible ideal output levels. What is the LSB step size?
Assuming a third-order nonlinearity for the envelope detector in Figure, prove that the output spectrum of the system exhibits growth in the adjacent channels.
State at least two conditions necessary to guarantee that a stochastic process is wide sense stationary.
Determine the Values of Resistors R1 and R2 - Determine the Minimum Acceptable value for the coupling capacitor C if the lowest frequency of the incoming signal is 1.2kHz.
A communication system must transmit the following real valued signal: v(t) = 4cos(2pi*10MHz*t) + 2cos(2pi*20MHz*t)+cos(2pi*30MHz*t)V For this signal, sketch the positive-frequency power specturm P(f>0)
A 0.51-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples.
Let A be a Mealy machine. Which of the following transformations, if any, yield a Moore machine? Explain. 1) Adding a D flip-flop to each output (the outputs of the new flip-flops will be the new outputs of the machine).
A 1(lambda) wavelength long line has parameter R=0.2 Ohm/m, G=0.002 mho/m, L=15 muH/m and C=2.31pF/m. The line is operated at a frequency f=2.5 GHz. It is terminated with a load impedance of 100 Ohms.
Design a series RLC circuit that will have an impedance of 10 Ω at the resonant frequency of ω0 = 50 rad/s and a quality factor of 80. Find the bandwidth.
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