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(Carrierless amplitude-phase modulation (CAP)) We have seen how to modulate a baseband QAM waveform up to passband and then demodulate it by shifting down to baseband, followed by filtering and sampling. This exercise explores the interesting concept of eliminating the baseband operations by modulating and demodulating directly at passband. This approach is used in one of the North American standards for asymmetrical digital subscriber loop (ADSL).
(c) Suppose that is now sent over a communication channel. Suppose that the received waveform is filtered by a Hilbert filter before going through the demodulation procedure above. Does the scheme still work?
Using the solubility data of a solid in a specified liquid, explain how you would determine the mole fraction of the solid in the liquid at the interface at a specified temperature.
A venturi water meter with a throatof 6 in registers a presssure head difference of 128 in of water between the inlet and throat. calculate the quantity of flowthrough the meter using a discharge coefficient of.93.
A piston-cylinder device initially contains 1.4 kg saturatedliquid water at 200 C. Now heat is transferred to the wateruntil the volume quadruples, and the cylinder contains saturatedvapor only
1.a college student borrows 1500 during his senior year. the loan is to be repaid in 20 equal quarterly installments.
Reconsider Prob. 12-16. Using EES (or other) software, verify the validity of the last Maxwell relation for refrigerant-134a at the specified state.
A steel cylinder tank is 10 ft in diameter, 15 ft high, and is filled with a brine solution. Brine weighs 10 lbf/gal. The thickness of the steel shell is 1/2 in. The cylinder sits on a concrete pad 12ft x 12ft .
Estimate the factor of safety of the slope against sliding. Use the table on page 2 as a design guide.
Calculate expected error L if a theodolite has direct angular accuracy of 10" and a distance of 1500m was measured.
Viscous flow in a pipe is to be tested in the laboratory using both air and water. Assume that the velocities (Vair and Vwater) are such that the air flow is dynamically similar to the water flow. Determine the ratio of the velocities, Vair/Vwater, i..
The basic barometer can be used to measure the height of abuilding. If the barometric readings at the top and at the bottomof a building are 28.7 and 29.7 in Hg, respectively, determine the height of the building in feet.
A three-point bending test is performed on a glass specimen having a rectangular cross section of height d=5mm and width b=10mm; the distance between support points is 45mm.
1. why the prediction are less than the observed result of connection in tension experiment?2. what difference does the
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