For the following causal difference equation,
given that y[-1] = 2, y[-2] = 3, and x[n] = 3ⁿu[n], solve using z-Transforms.
(Hint: convert to delay operator form, find the z-Transform, use PFE to find the inverse z-Transform)

y[n + 2] – 3y[n + 1] + 2y[n] = x[n + 1]

Assume a transmission line with ZL = 65 + j40 Ω and Zo = 60 Ω. If the frequency of the line is 2GHz, use the Smith Chart to find: i) the reflection coefficient; ii) the distance to the first voltage maximum; iii) the voltage standing wave ratio; iv) the admittance of the load; v) the position of the short-circuited stub on the main line for a perfect impedance matching; vi) the length of the short-circuited stub. (Show all steps on the Smith chart)

Plot -3x³+ 25sin(3.14x/4-15.5/4) + 7.43 for -2 < x < 2.5 to determine its roots . The number of roots is: using MATLAB

For the following causal difference equation,
given that y[-1] = 0, y[-2] = 1, and x[n] = u[n], solve using z-Transforms.
(Hint: convert to delay operator form, find the z-Transform, use PFE to find the inverse z-Transform)

4y[n + 2] + 4y[n + 1] + 2y[n] = x[n + 1]

design a stepper motor in 8051 microcontroller in which stepper motor moves clockwise for some time and stops , then anticlockwise for some times and motor stops. (Code in assembly language needed)

Then, answer the following questions about the System on a Chip (SOC) and Package on Package (POP) that the RPi implements:
1. The Broadcom SoC is installed in a large range of devices. Explain what the advantages are of having a System on a Chip rather than a separate CPU, GPU, and RAM components.
2. What are the disadvantages to a SOC style chip?
3. Explain using step-by-step instructions how the CPU executes a simple program such as adding two whole (integer) numbers together. You should refer to the Control Unit, RAM, cache, registers, and the Arithmetic Logic Unit in your explanation. You should also be able to name the roles of some of the registers.
4. What is the basic difference between a SOC and a POP? Which method was used to include the RAM on the R-Pi?
5. Where does one typically find SOC and POP type chips?
6. What are some of the instructions that make up the Instruction Set Architecture of the Broadcom ARM chip in your Raspberry Pi? An example we’ve used in class is ADD, list at least 5 others. Does it use a RISC or a CISC instruction set?
7. What are some of the named registers in your Broadcom ARM Chip on your Raspberry Pi?
8. How much level 1, level 2, and level 3 cache does your CPU in the Raspberry Pi have access to?

It is required to find out the day night equivalent noise levels at location. The three hourly day average values in dB are 45,58,50,61,64 and the three hourly night average values in dB are 48,42,28. compute Ldn.

Understand the principles of Quadrature Phase Shift Keying (QPSK). Measure Bit Error Rate (BER). Understand the effects of having phase errors in the received signal.

i need matlab code for qpsk modulation and demodulation both

also bit rate error using of the recived signal

i repeat i need matklab code for all task  

1) qpsk modulation

2) qpsk demodulation

3) ber bit eroor rate matlab code

Three point electric charges of magnitude Q1=2.0 μC, Q2= -1.0 μC, and Q3= 2.0 μC are situated in a straight line in air 10 cm apart (the negative charge is in the middle). Determine the of the force of each charge on the other two.

Answer in MATLAB format. 4. A telephone line hangs between two poles 14 m apart in the shape of a catenary y = 20cosh (x/20)-15, where x and y are measured in meters. a. Find the slope of this curve where it meets the right pole. b. Find the angle, θ between the line and the pole.

Please do it clearly on white A4 page. thanks

A three-phase, 4 poles, 1200Hp, 2300V, 60 Hz Delta connected synchronous motor has a synchronous reactance of 5 Ohm. At full load the line current is 265 A and lags the terminal voltage. Neglect all losses and compute the following

Torque of the motor

Ea and delta angle

Motor Power Factor

Reactive power

A current transformer rated 500/5 A, 20 VA, 50 Hz has a turns ratio of 1:99. Its
resistance aand leakage reluctance of the secondary winding are 0.4 Ω and 0.35 Ω
respectively. At rated non-inductive burden, the inphase and quadrature components of
the exciting mmf are 6 AT and 8 AT respectively. Determine the current and phase angle error.