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In a certain wireless channel, the delay spread TD =10 µsec and the maximum Doppler spread fd=0.2 kHz. The maximum propagation attenuation is 40dB.
The total power available at the transmitter is 1.08Watt. (Hint: i.e., the minimum received signal power is 0.108 mWatt.) The total bandwidth is 2 MHz
For the OFDM receiver, the received noise power density is 0.1µWatts/MHz. The total intercarrier interference power (for all subcarriers combined) is (fdT) 2mWatts where T is the OFDM symbol duration.
a.) what is the minimum guard time interval for preventing intersymbol interference?
b.) what is the maximum data rate (BPSK signaling) where minimum SINR is 40 (in linear scale)?
A 1.12 kg block is attached to a horizontal spring with spring constant 3500 N/m. The block is at rest on a frictionless surface. A 10 g bullet is fired into the block, in the face opposite the spring, and sticks.
Determine the fundamental frequency w0, the period t0, and the coefficients in the representation X(t) = x0 + Re{k=1N Xkejkwot} for the above input. Remember, you can do this problem without evaluating any integrals.
Perform the calculation from t = 0 to 20 s with step size of 1 s. Use an initial condition that the parachutist has an upward velocity of 20 m/s at t = 0. At t = 10 s, assume that the chute is instantaneously deployed so that the drag coefficient ..
Which is the best alternative to buying a machine assuming an interest rate of 4% and a time span of 6 years. Compare using Present Values. A: Buy new machines for $25k. They earn $5k per year and their maintenance costs are $125 per year.
The system uses a 7-cell reuse pattern. If the offered traffic per user is 0.03 Erlangs and the average number of calls per hour per user is 1.5, for an Erlang-C system with a probability of delaying a call being 5%, calculate the traffic load per..
At the receiver, demodulate the double side band signal S(t) = [cos(90*pi*t) + cos(120*pi*t)] * [cos(400*pi*t)], with the local carrier cos(400*pi*t). Design a low pass filter to suppress the carrier and plot the amplitude spectrum of S(t)
An automatic automotive spray painting system consists of conveyors, spraying, dust and overspray extraction fans with electrostatic and water walls, finishing with baking ovens. This system is connected to a 415V, 50 Hz three phase and has been divi..
Design a logic circuit, LOGARITHM that converts an input number X to its logarithm, log(X). Input X is given as an unsigned real number such that, 1.00
An infinite grounded conducting tube of radius 10cm is centered on the z axis. A concentric charged tube of radius 6 cm has a surface charge density of 24 uC/m2. A 1m long section of the charged tube is compressed to change its radius to 3 cm.
Hooke's law describes a certain light spring of unstretched length 33.6 cm. When one end is attached to the top of a doorframe and a 7.31 kg object is hung from the other end, the length of the spring is 42.4 cm.
For an ideal Zener, is the Zener voltage is 15v and the power rating is 750mW, what is the maximum zener current allowed What is the relationship between base current and collector current called
Develop the VHDL text file for a binary down-counter to divide a frequency by 32. Use Q as the outputs and CLK as the falling edge clock input.
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