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Consider the uplink of a CDMA system. Suppose there is only a single cell with just two users communicating to the base-station in the cell.
1. Express mathematically the set of all feasible power vectors to support given cb/I0 requirements (assumed to be both equal to /3).
2. Sketch examples of sets of feasible power vectors. Give one example where the feasible set is non-empty and give one example where the feasible set is empty. For the case where the feasible set is non-empty, identify the component-wise minimum power vector.
3. Now suppose there are two cells with two base-stations and each of the two users can be connected to either one of them, i.e. the users are in soft handoff. Extend parts (1) and (2) to this scenario.
4. For a general number of users, do you think that it is always true that, in the optimal solution, each user is always connected to the base-station to which it has the strongest channel gain? Explain.
A parallel-plate capacitor has plates of very large extent such that the electric field is perpendicular to the plates. The plates are separated by a distance of 1mm, and a voltage of 100 V is applied to them.
Obtain a primitive flow table for an asynchronous circuit with two inputs, x1 and x2, and two outputs z1,z2 that operates according to the following specs: a) when x1x2 = 00, the output z1z2 = 00
In a feedback system, the forward path has a transfer function of the form G(s)=k/(1+s/Omega_p) and the feedback path has a gain of k_fb which is less than unity. Calculate the bandwidth of the closed-loop transfer function
The nameplate on a 460-V 50 hp 60 Hz four pole motor indicatesthat the speed at rated load is 1760 r/min. assume the motor to beat operating load. a) What is the slip of the rotor b)what is the frequency of the rotor currents
Discuss the differences between, advantages and disadvantages of the following types of grounding systems: ungrounded, solidly grounded and high resistance grounded systems.
Several of the voltages associated with certain circuit are given by V12 = 9 phase angle 30 degrees V, V32 = 3 angle 130 degrees V, and V14 - 2 angle 10 degrees V. Determine V21, V13,, V34 and V24
1. Consider the following voltage wave V(t) = 170 + cos(377)t volts what's the RMS value of this wave 2. What voltage will a DC voltmeter read if connected to an ideal voltage generator with the voltage of V(t) = 170 + cos(377)t.
Solve the equation z^2+z+1=0 using z=(x,y) and the basic definitions. (Hint: Note that y does not equal 0 because the equation X^2+X+1 does not equal 0 for any real number x.)
A platinum resistance coil has a resistance at O0 C of 100 . Determine the change in resistance that will occur when the temperature rises to 30°C if the temperature coefficient of resistance is 0.0039 K-1.
Signal generator‘s internal impedance is purely resistive andhas an open-circuit voltage of 3.5 V. When the generator is loaded with 22 ohms of resistance, its terminalvoltage drops to 2.8 V. What is the generator's output impedance (pure resistanc..
What is the largest peak value of impulse voltage that can be applied to a test object of 10nF - Find the output terminal voltage and the peak-to-peak ripple - What will be the multiplication factor for each of the low voltage voltmeter readings.
An FM receiver is modulated with a signal having a baseband bandwidth of 15 kHz and the maximum frequency deviation is 45 kHz. Assume that preemphasis is added with a 3-dB boost frequency of 5 kHz.
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