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Suppose that you wish to offer a voice over IP wireless service. The target packet error rate (or drop rate) is 10^3 and you determine that if the signal is confined to within a coherence band, about 20% of the packets are dropped due to fading. To solve this problem, you introduce frequency diversity by spreading the signal over multiple coherence bands.
a. If each coherence band is 100 kHz and experiences independent fading, about how much bandwidth does your system require? (Hint: calculate the probability that at least one of the coherence bands will not be faded according to the slides on selection diversity.)
b. Now suppose that an error correction code is introduced into the original (narrowband) system that reduces the packet drop rate to 5%. How does this change the bandwidth your system requires?
Does the degree of difficulty change when switch from solving a two loop mesh circuit to a three loop mesh circuit Why and why not
a) By applying Kirchoff's voltage law to the output (DC) circuit loop determine the DC Load Line, i.e. an expression relating Id to Vds. Comment briefly on the significance on the result, with respect to the slope and x-axis intercept.
Why is quality a difficult term to define. how can we improve our understanding of quality?
A circuit that is made from a voltage source in series with the switch then in series with the parallel set of a resistor and a capacitor. The switch is originally open, it is then closed.
Two dc motors are compared. the first one is a 4hp dc motor which draws a current or 0.7A when the field is connected to a 150V source. the second, a 600 hp motor draws a field current of 5A when the field is connected to a 300V dc source.
Create a program using AsmIDE, which utilizes the Fox 11 68HC11 microcontroller board: Speech timer where max time is 5 minutes Use the switches for:
A pulsar lies 1000 light years from Earth. The average plasma concentration is 1 el/cc. Using the plasma dispersion relationship for group speed, what is the group delay between a pulsar pulse received at 1 GHz and at 800 MHz
The DC shunt motor is running at full load with a supply voltage of 440 V and a supply current of 70 A. The rotation speed in full load is 1000 rpm, the field resistance is 200 Ohm and the armature resistance is 0.2 Ohm.
4. Your measurement device samples data every 0.1 minute. What is the heart rate you will measure 5. How will your measurement change if the sampler period goes down to 0.01 minute 6. How will your measurement change if the sampler period goes up to ..
In a balanced three-phase wye-wye system, the load impedance is 4 + j3 . The source has phase sequence abc and Van = 120
I started writing a program and need help. I need to be able to enter up to 15 numbers and output the minimum number, maximum number and the geometric mean.
a sinusoidal voltage has a peak value of 15V, a frequency of 500Hz, and crosses zero with a positive slope at t=0.1 ms. write an expression for the voltage using a cosine function in terms of t and constant pi.
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