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In wireless communications, the effects of multipath significantly affect the quality of the received signal. Due to the presence of buildings, cars, etc. between the transmitter and the receiver, the sent signal does not typically go from the transmitter to the receiver in a straight path (called line of sight). Several copies of the signal, shifted in time and frequency as well as attenuated, are received-that is, the transmission is done over multiple paths each attenuating and shifting the sent signal. The sum of these versions of the signal appears quite different from the original signal given that constructive as well as destructive effects may occur. In this problem we consider the time-shift of an actual signal to illustrate the effects of attenuation and time shift. In the next problem we consider the effects of time and frequency shifting and attenuation.Assume that the MATLAB "handel.mat" signal is an analog signal x(t) that it is transmitted over three paths, so that the received signal isy(t) = x(t) + 0.8x(t -t ) + 0.5x(t - 2t ) and let t 0.5 seconds. Determine the number of samples corresponding to a delay of seconds by using the sampling rate Fs (samples per second) given when the file "handel.mat" is loaded.To simplify matters, just work with a signal of duration 1 second-that is, generate a signal from "handel.mat" with the appropriate number of samples. Plot the segment of the original "handel.mat" signal x(t) and the signal y(t) to see the effect of multipath. Use the MATLAB function sound to listen to the original and the received signals.
The LM358 op amp can be a single or dual supply op-amp. This mean that it can operate with just a single supply i.e. + 5 volt or with dual supplies i.e. (+ and -) 5 volt supplies. With a inverting configuration with dual supplies (+5v and -5v) bei..
(a)find the work done in moving a point charge +2C from (2,0,0) to (0,2,0) and then from (0,0,0) to (0,2,0). (b)find the work done in moving a point charge +2C from (2,0,0) to (0,2,0) along the straight-line path joining the two points.
1) 70 lbs/hr of steam at 300 psia, 500oF passes through a turbine which expands it to a pressure of 30 psia. If the turbine operates with an efficiency of 70%: a) What is the temperature of the steam leaving the turbine
A total of 3.00 106 electrons are placed on an initially uncharged wire of length 1.44 m. (a) What is the magnitude of the electric field a perpendicular distance of 0.412 m away from the midpoint of the wire
two resistors with nominal values of 4.7K ohm and 10K ohm, are used in a voltage divider with a +15V supply to create a nominal +10V output. Assuming the resistor values to be exact, what is the actual output voltage produced
A 460-V, three-phase,60-Hz system supplies power to a 10-kVA, delta-connected resistor load; a 50-kVA, 0.86 power factor induction motor, and a wye-connected synchronous motor that is operating at 0.62 power factor leading
A pinecone falls straight down from a pine tree growing on a 20 degree slope. The pinecone hits the ground with a speed of 10 m/s. What are the components of the pinecone's impact velocity: a. parallel and b. perpendicular to the ground
How much stator referred „external? resistance per phase should be connected in the rotor
The required exposure energy for a positive photoresist is 140 mJ/cm2 and for a negative photoresist is 9 mJ/cm2. Assuming negligible times for loading and unloading wafers, compare the wafer throughput for positive photoresist and negative photor..
Discuss why the primary of a power transformer would have excessive current if the secondary were short-circuited. Why would there be no voltage across the secondary if the primary is open. Explain how a transformer with a 1:1 turns ratio.
Give a single intensity transformation function for spreading the intensities of an image so the lowest intensity is 0 and the highest is L-1.
A transmission line is specified by the following, while operated at omega w=6*10^8 rad/s, L'= 0.4*10^-6 H/m, C'=40*10^-12 F/m, G'=80*10^-6 S/m, and R'=20 ohms/m. Find the attenuation rate after a wave propagates 10 meters on this line.
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