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Electrical Engineering

Calculating Path Loss, RF Power and Bit Rates

A microwave line of sight link transmits a 10.0 GHz signal a distance of 25 km across a river estuary. The transmitter delivers 2 W to the transmitting antenna. The antennas at each end of the link have a gain of 36 dB. The receiver has a noise bandwidth of 20 MHz with rms noise power of -120.0 dBW. The transmitter and receiver

Speech/Video Compression techniques.

1. Name two techniques that are used to compress digital speech, and the resulting compressed speech bit rates. 2. Name two techniques used to compress digital video. Why is compression particularly important for the transmission of digital video signals? 3. What is the modulation used to transmit HDTV signals over the ai

Improving Memory Systems Reductions

Please provide a detailed step by step solution. An embedded application requires a certain level of overall performance and after the first design phase is completed, it is evident that the chosen processing system is inadequate and needed to achieve an overall improvement in speed of at least 20%. The designers then looked

Op-Amp THS4021

FIGURE 2(a) shows the Bode plot of op-amp THS4021. The manufacturer describes this device as a ââ?¬Ë?decompensated op-ampââ?¬â?¢, by which is meant that the frequency compensation is partial as opposed to ââ?¬Ë?uncompensatedââ?¬â?¢ where no compensation is used at all. The advantages of ââ?¬Ë?decompensa

TDMA operation and analysis of given system

This question uses part of the FDMA question that has also been assigned (#434455). The earth station in Question #1 transmits a digital data signal with a bit rate of 10 Mbps into a TDMA frame in a second transponder on the same GEO satellite. The transponder has a bandwidth of 36 MHz. The earth station modulation is

Why is a spreading code used in a CDMA radio system?

A terrestrial radio link transmits a CDMA signal from a base station using a spreading code with a chip rate of 1.0 Mchips per seconds. The message data rate of the signal is 10 kbps. a. Why is a spreading code used in a CDMA radio system? b. What is the coding gain of the correlator in a CDMA receiver when it is synchroni

Frequency Modulation

Double sideband suppressed carrier AM (DSB-SC AM) is used in the transmission of stereo signals in sound broadcasting using frequency modulation. The transmitted stereo signal is a voltage proportional to L-R, where L and R are the left and right audio signals. a. A DSB-SC AM waveform is generated by modulating a 38 kHz carr

Modulation of the NTSC TV signal and questions around DSB-LC FM

The NTSC television signal format uses frequency modulation of a 4.5 MHz sub carrier to attach the TV audio signal to the baseband video signal which extends from 0 Hz to 4.2 MHz. The maximum frequency of the baseband audio signal is 10 KHz and the bandwidth allocated to the FM audio signal is 100 kHz. a. What is the peak fr

Analysis of bandwidth of an amplifier and output power signal

An audio amplifier has the following frequency response (transfer function): At 20 Hz, gain = 30 dB. At 60 Hz, gain = 37 dB. At 120 Hz, gain = 40 dB. At 10,000 Hz, gain = 40 dB. At 12,000 Hz, gain = 37 dB. At 16,000 Hz, gain = 30 dB. The gain of the amplifier is constant from 120 Hz to 10 kHz at 40 dB. a. Wh

PLC interface question

5 (d) The circuit shown in FIGURE 3 is part of the interface of a relay output module. Ib is 1 mA and Vcc is 9 V. The relay requires a minimum of 50 mA to energise. Complete the values of the assumptions listed below in order to calculate: • Voltage across R1 • value of Ri • voltage across the relay coil • voltag

Convert the following numbers to dB with the correct dB units

Convert the following numbers to dB with the correct dB units a. A transmitter power of 250 watts b. A received power of 2 x 10^6 watts c. A noise temperature of 100 K d. A bandwidth of 4.0 MHz e. A radio receiver has a noise power N = kTB watts, with T = 100 K and B = 1.0 MHz. The value of k is 1.38 x 10^

Moore sequential circuit

A Moore sequential circuit has one input and one output.The output goes to 1 when the input sequence 111 has occurred and the output goes to 0 if the input sequence 000 occurs. At all other times, the output holds its value. Example: X 0 1 0 1 1 1 0 1 0 0 0 1 1 1 0 0 1 0 0 0 Z 0 0 0 0 0 0 1 1 1 1 1 0 0 0 1 1 1

From a given z transform X(z) = {1- z^-10}/{1 - z^-1} the discrete time domain form x(n) is deduced using complex manipulation and inverse transforms to arrive at x(n) = x(n-1) + u(n) - u(n-10) The second part shows how to convert the given X(z) into a polynomial in z as X(z) = 1 + z^-1 + z^-2 + .... + z^-9 Finally the third part goes on to show the poles and zeros of X(z) and plot these in the complex z plane as zeros , z(n) = 0.2n*pi, magnitude 1, Poles at 0

From a given z transform X(z) = {1- z^-10}/{1 - z^-1} the discrete time domain form x(n) is deduced using complex manipulation and inverse transforms to arrive at x(n) = x(n-1) + u(n) - u(n-10) The second part shows how to convert the given X(z) into a polynomial in z as X(z) = 1 + z^-1 + z^-2 + .... + z^-9 Finally the th

Safety, and Reliability Concerns and Risk

1(a) Are safety and reliability concerns more or less important in an embedded application when compared to a non-embedded system? Why or why not? 1(b) What is risk? Give several examples of low and high risk embedded applications. Identify several embedded applications that may either be high or low risk depending on their o

Pseudo Code

Write the pseudocode for a program that does the following: The user is prompted to enter an integer between 1 and 1000. When the user enters the integer, the program uses a repetition control structure to validate whether the integer is within the proper range; otherwise, the prompt is continuously redisplayed to the user un

Sampling rate, Systems function, Region of convergence

** Please see the attached file for the complete problem description ** 1. If the -3dB cut-off point for the filter shown (in the attachment) occurs for a real frequency of 200Hz then what should be the sampling rate (samples per sec)? 2. The difference equation for a digital filter is given by: y(n) = 2y(n-1) + y(n-2) + x

Methods used to eliminate noise from a spatio-temporal signal

Name and describe, in detail, 2 methods used to eliminate noise from a (spatio-temporal) signal. This question requires a clear, detailed explanation of the methods. Mathematical equations can/should be minimized. The application under consideration are signals from an EEG or MEG reading.

S-R flipflops have a forbidden state that makes them hard to use.

S-R flipflops have a forbidden state that makes them hard to use. Some designers switched to the following flipflop instead. Fill in the timing diagram shown. Then, describe what the flipflop does in each of the cases of M and N (i.e explain what the output does for each combination of the inputs). Note that filling in this timi

This is a Java application that prints out numbers.

Write a Java application that prints out numbers 2, 4 and 6 in row 1, numbers 3, 5 and 7 in row 2, numbers 8, 10 and 12 in row 3 and numbers 9, 11 and 13 in row 4. There should be an underline followed by a row of numbers that adds the numbers in the respective columns. The program should print out the information as follows:

System analysis and design

Elmwood College Situation: The school is considering a new system that will speed up the registration process. As a systems analyst, you are asked to develop a plan for fact-finding. a. List all the possible techniques that you might use. b. Describe an advantage for each technique. c. Suppose the development budget is t