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Problem 1:
a. Let an be a real random sequence. The value of an is 1 or -1 of equal probability. What are E(an) and E(anam)? Briefly prove your results.
b. Let an be a real random sequence. The value of h is 1 or -1 of equal probability. What are the mean and variance of n∑n-1a. ? Briefly prove your results.
n -1
Problem 2: Walsh Code
Find 16 Walsh codes for modulating (encoding) a 4-bit data packet
Problem 3.
Design a m-seguence PN generator using 3 shift registers. Show design procedure. circuit and PN sequence.
Voltage in complex forms, An engine consumes 10kw of power and 4kvar reactive power at a current of (6+j4)Amps
purchase an inductor coil for a resonance circuit resonating at 1500 kHz; the operating bandwidth is 10 kHz. What is the quality factor Q of the coil
Using the Nth order term only of the transfer polynomial, find the Nth order relationship for the Nth order products.
How do you write Kirchhoff's voltage law equation for a circuit.
An LED is connected to a 74LS244 in an active-LOW configuration. The key parameters for the 74Ls244 are IOH=-15 mA, IOL=20 mA, VOH =2.0V and Vol=0.5V. The LED has a voltage drop of 2.0V and an operating current of 15 mA.
Mrs. Brooke owns a robot with an FSM brain. The robot walks from left to right along a paper type containing a sequence of 1's and 0's. On each clock cycle, the robot walks to the next bit.
Suppose a 12-V battery bank rated at 200 Ah under standard conditions needs to deliver 600 Wh over a 12-h period each day. If they operate at -10 Celsius, how many days of use would they be able to supply
Phosphorus atoms, at a concentration of 5*10^16 cm^-3, are added to a pure sample of intrinsic silicon. Assume the phosphorus atoms are distributed homogeneously throughout the silicon sample. What is the fraction by weight of phosphorus
A three-phase ,600MVA,13.8KV Ac generator has a synchronous reactance of 2.0 per unit. The generator is connected to a system for which specified base fare 100MVA and 345KV.
What is the bandwidth required so that the modulated signal contains atheist 90% of the power of the unmodulated carrier. A carrier signal c(t) = 10 cos(2pifct) is modulated using a message signal m(t) cos(20pit). The modulation is FM, with kf = 50.
Design a buck converter that has an output of 12 V from an input of 18 V. The output power is 10 W. The output voltage ripple must be no more than 100 mV p-p. Specify the duty ratio, switching frequency, and inductor and capacitor values.
An open-circuited 50ohm microstrip transmission line is used in a microwave amplifier circuit to provide a capacitance of 3.2 pF at 2.3 GHz. (a) Find the appropriate electrical length of the line.
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