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Electrical Engineering

Fourier Series for Sawtooth Waveform

Please show as much working as possible and comment where possible. Obtain a Fourier series for the sawtooth waveform in attachment. Please base your answer on the integrals mentioned in the attachment. See the attached file.

Fourier Series: Even and Odd Functions

Please show as much working as possible and comment where possible. Compare the values of f(x) and f(-x) to show which of the following are odd, even or neither. Give a reason for each. Please see the attachment for complete question.

Insertion Loss of T-Network

Given the transmission matrix, calculate the insertion loss of the T-network. Please refer to the attachment for the matrix and the network diagram. I have provided the formula I am working from but I normally prefer a completely different set of workings to provide a good base for comparison/improvement to my own methods.

Phase change down the transmission line and the input impedance to the line

Please show as much working as possible and comment where possible. (a) A transmission line has a length, l, of 0.4 lambda. Determine the phase change that occurs down the line. (b) A 50 Ohm lossless transmission line of length 0.4 lambda is terminated in a load of (40 + 30j) Ohm. Determine, using the equation given below

Two-Port Network, Z-Parameter Matrix

Please see the attachment for mentioned network and circuit diagrams. 1. Find the z-parameters of the two-port network below. 2. In the circuit below, the two-port network TPN can be represented by the z-parameters shown. a. Represent the complete circuit by a z-parameter matrix. b. State if the complete circuit is rec

Mesh currents

Please see attachment for questions with mentioned figures. Please show good process of solving mesh current in circuits. Consider the circuit shown in Figure P1-14. Find the unknown currents I1, I2 and the voltage across the resistance R. Refer to the circuit shown in Figure P2-14. What are the currents I2 and I3?

Delta to Wye Conversion

Please show as much working as possible and comment where possible. By applying a star-to-delta conversion on Z3, Z4 and Z5, determine the input impedance, Z_IN, to the circuit. Use the impedance values given in the table. Please see the attachment for complete question.

Design a Variable Frequency Divider, and a Mod-31 LFSR Counter using AHDL.

Activity 3: (Problem 14A.6) Design a variable frequency divider using AHDL. The frequency divider should divide the input frequency by one of four different factors. The divide-by-factor is controlled by two mode controls, as described by the following function table. The mode controls are used to change the modulus of the

Digital Communications

Order the following modulation types in terms of spectral efficiency (best to worse) and explain why (be specific, show a number and how you got it): 64-QAM, QPSK, 8-PSK, and BPSK. Assume that the r=0, perfect filtering.

Outgoing traffic intensity and the number of channels.

A telephone switching board can handle 120 phones. Assuming the following, and determine the outgoing traffic intensity and the number of channels. * On average 5 calls/hour per phone * 60% of all calls made are external * Average call duration time is 4 minutes * GoS = 0.9%

Erlang B chart find the traffic intensity

A single GSM service provider supports 10 digital speech channels. Assume the probability of blocking is 1.0%. From the Erlang B chart find the traffic intensity and determine how many 3 minute calls this represents: a) 20 calls b) 100 calls c) 50 calls d) 240 calls

Cantilever and Strain Gauge

Please refer to the attached pdf file for complete question with mentioned figures and tables. 1. The cantilever and strain gauge act as the transducer in a force-measuring instrumentation system as shown in FIGURE 2. An applied force FT (the true force) is the input to the system and the output is FM (the measured force). Id

Modern Communications

1. Explain in your own words why standards are so important. 2. List 3 standards used in IT and briefly describe them and what they regulate. 3. Describe in you own words how a modem works and what steps the data goes through to be sent from one terminal to another via modem. 4. What can affect /deter modem communicatio

Electrical signal feedback, Public Address system, Howling

Please answer the following questions. (a) It is found that if a microphone is brought into the proximity of a loudspeaker on a public address (P.A.) system, the system will `howl'. Carefully explain, making reference to feedback theory, why this is so. (b) Suggest two actions that could be adopted to remedy the howling. (c

Example of Infared PLCP Frame

The diffused infrared PHY layer convergence procedure standards (PLCP) reformats the data received from the MAC layer into a frame that the physical medium dependent sublayer can transmit. Give an example of an infrared PLCP frame illustrating its component parts and the function of each part.

A C++ Example of Classes and Inheritance

Write a C++ program that uses 7 classes following a tree inheritance structure. The base class must also have a virtual print() function that displays the class name. Randomly assign print functions in three other classes that display the class name. Create 7 pointers of the base class and have them point to all the cla

Compute the gain in energy for the charge.

A region in space has an Electric field given by E = x(x^) - y(y^) + xy(z^) where (x^), (y^), (z^) indicate corresponding letter with caret on top of it. A charge of 1 uC moves along a straight line with constant velocity from (0,0,0) to (1m,1m,1m). What is the gain in energy for the charge? Please provide a step by step s

Linear time-invariant continuous-time system

1. Is the linear time-invariant continuous-time system with the impulse response h(t) = sin 2t for t ≥ 0 BIBO is stable? Explain. 2. Determine if the linear time-invariant continuous-time system defined by: is stable, marginally stable, unstable, or marginally unstable. Show work. 3. Compute the steady-state

Z-Transform for Discrete-Time Signal

1. A linear time-invariant discrete-time system is excited by the input x[n] = d[n] + 2u[n-1] (d represents δ(delta)). The resulting output response with zero initial conditions is y[n] = ((0.5)^n * u[n]). Determine the transfer function of the system. 2. For a discrete-time signal x[n] with the z-Transform: X(z) = z /

Multiple access technologies FDMA, FDMA and CDMA.

In design of radio systems that incorporate wireless networks, considerations must be taken such as user access, transmission direction, switching and signal strength. Explain multiple access technologies FDMA, FDMA and CDMA regarding: a. How they are used. b. Address their strength and weakness. c. Which technology, in yo

Laplace Transform, Differential Equation and Inverse

Use Laplace transforms to compute the solution to the given differential equation. Please look at the attachment for further details. Use Laplace transforms to compute the solution to the differential equation given below. (d^2 y(t))/(dt^2 )+6 dt/dt+8y=u(t) where y(0)=0;y ̇(0)=1 Compute the inverse Laplace transform of:

Computing a Discrete Time Fourier Transform

1. For a discrete-time signal x[n] with the DTFT where b is an arbitrary constant compute the DTFT V(Ω) of v[n] = x[n] - x[n-1]. 2. Compute the rectangular form of the four-point DFT of the following signal, which is zero for n<0 and n>=4. 3. Compute the inverse DTFT of: X(ω)=sinΩ cosΩ 4. Compute the inverse DTFT of