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Consider a SISO link with received signal α = hs + n, where h is a zero-mean complex Gaussian random varaible with unit variance, where the power of the data signal s is mathbbE (IsI2) = P, and where n is a zero-mean AWGN scalar with unit variance.
Give an expression for the ergodic capacity of this channel, and show that an upper bound on the ergodic capacity is log2(1 + P) using Jensen's inequality.
A diode is connected in series with a 30-V rms source to charge a 12-V battery with an internal resistance of 0.1 ohm. Specify the series resistance necessary to limit the peak current to 2A. Estimate the time required to recharge a 10-A hr batter..
The Bandwidth of a broadband signal is 6 MHz and it's maximum frequency is 106Mhz. What is the most likely carrier frequency. WHich of the follwing is not a fundamental characteristics determines the effectiveness of a communication system.
Assuming that the scores are normally distributed and the standard deviation for the scores is 80, find the probability that a randomly selected business graduate student at this school has a GMAT score over 700.
An MFSK modulation scheme with M = 4has a carrier frequency of 250 kHz, a difference frequency of 25 kHz, and two bits per signal element. Make a frequency assignment for each of the possible data combinations.
A point charge of 16 nc is located at Q(2,3,5) in free space and a uniform line charge of 5nC/m is at the intersection of the planes x = 2 and y=4. If the potential at the origin is 100V, find V at (4,1,3).
Suppose you want to build a simple RS flip-flop that is set and reset by negativegoing pulses. All you have are two 2-input AND's and two 2-input NOR's. Show how you would build this odd circuit from the available material.
Develop a voltage-to-current converter that satisfies the requirement I = 0.0021Vin. If the op amp saturation voltage is ±12 V and the maximum current delivery is 5 mA, find the maximum load resistance.
After t = 0, the current entering the positive terminal of a flashlight bulb is given by: i(t) = 2(1 - e^ -10t) A and voltage given by: v(t) = 12e^-10t V Determine the maximum power delivered to the flashlight.
A three-phase delta connected load has a phase resistance of 15 ohms and a phase reactance of 17 ohms when connected to a 480VAC 60HZ line. What is the phase impedance, phase current power factor, and total power delivered to the load
Solve for x1 and x2 in the system of equations given by x2 -3x1 + 1.9 = 0: x2 + x12 - 1.8 = 0 by Gauss method with an initial guess of x1 = 1 and x2 = 1
Derive the dynamic model and average value circuit of a buck converter assuming the ESRs of the inductor and capacitor are not equal to zero.
Two friends A and B meet every morning at the Grand Central Station around 7 am. Suppose the actual times they arrive are independent and uniformly distributed between 6:55 am and 7:05am.
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