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In a multiuser CDMA system of DSSS, all transmitters are at equal distances from the receivers. The additive white Gaussian noise density Sn(f) = 5x10^-7 W/Hz. BPSK is used by all users with bit rate = 16 kb/s. There are 16 users.
(a) Assuming that the spreading codes Ci for the users are orthogonal, find the desired user power signal Pi to achieve Bit Error Rate = 10^-5.
(b) Now assume that the spreading codes are not orthogonal, specifically: Ri,i = 1 and Ri,j = -1/16; i does not equal j. Determine the required user signal power to achieve the same BER (10^-5).
A turn contains three blue and seven white chips. A chip is selected at random. If the color of the chip selected is white, it is eplaced and two more white chips are added to the urn.
GaAs LED emitting surface size is 180 um by 180 um. The doping levels are NA = 9 E+15 cm-3 and ND = 5 E+17 cm-3. The n-layer is 70 um thick, and the p-layer is 8 um thick.
The initial voltage across the capacitor is 5V and the initial current through the inductor is 100 mA. A switch is thrown at t=0 such that the circuit is connected in parallel with a 50 mA independent current source.
The serial ports on two computers which use binary signaling are connected by a twisted pair cable. The cable has a flat frequency response up to 120KHz, with negligible group delay distortion. That is, the bandwidth of the cable is 120KHz.
In the movement of a robot arm, the arm is commanded to go from position 1 to position 5. Discuss the rise time, the overshoot, the settling time, and the steady-state error as it applies to the movement of a robot arm
A three-phase fault occurs at the generator terminals causing the angle of part (c) to increase. The fault is subsequently cleared. Find the maximum value that this angle can reach during the fault (i.e. the critical clearing angle) so that the ge..
The return current is through the outer conductor, which consists of an infinitely thin cylindrical shell of radius b. Use Ampere's law to calculate the magnetic field intensity everwhere.
Need the coding for the circuits and its a intelligent fan controller based on temperature?
What happens to the program counter (PC) when a subroutine is called. What register is used to keep track of the return point. What happens to the register that keeps track of the return point if a subroutine calls another subroutine
a) Based on your decision create a sampled signal of the sum of the two sines, and plot the magnitude of the zero centered FFT with property frequency annotation. Did it work Check with the data tip tool.
Write a program to generate a 25-Hz digital waveform with a 50 percent duty cycle on the PT0 pin as long as the voltage level on the PP7 pin is high. Your program should consist of two parts: Entry test. As long as the PP7 pin is low, it stays in t..
A voltage v(t) = 359.3 cos(wt) is applied to a load consisting of a 10 resistor in parallel with a capacitive reactance XC = 25. Calculate The instantaneous power absorbed by the resistor The instantaneous power absorbed by the capacitor
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