Homework Answers
In order to prevent interference, 7 guard bands are required for 8 channels.
Bandwidth required to support 8 channels = 8*25+ 7*5 = 200+35 = 235 kHz
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Q2. (2 marks) 8 channels each with 25 kHz bandwidth are to be multiplexed together. In...
4) Five audio channels each with a bandwidth of 20 kHz, are sampled at a 10% higher than the Nyqu...
4) Five audio channels each with a bandwidth of 20 kHz, are sampled at a 10% higher than the Nyquist rate and quantized using a 16 bit quantizer. These five channels are then time multiplexed. a. Find the overall bit rate of the output of multiplexer (4 Marks) and b. Find the minimum bandwidth required to transmit the output of the multiplexer when using 16-QAM with a raised cosine filter with a rolloff factor of 0.25 (2 Marks)
4) Five...
A TDMA system has a 2.5 MHz bandwidth with single channels of 25 kHz bandwidth each,...
A TDMA system has a 2.5 MHz bandwidth with single channels of 25 kHz bandwidth each, with each frequency channel containing 4 TDMA conversation channels. If each user is assigned 1 transmit and 1 receive slot within each frequency channel, how many users can this system support?
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
3. a. If 30 MHz of total spectrum is allocated for a duplex wireless cellular system...
3. a. If 30 MHz of total spectrum is allocated for a duplex wireless cellular system and each simplex channel has 25 kHz RF bandwidth, calculate the total number of channels per cell site, if the frequency reuse factor N = 4 cell is used. (5 marks) MEC_AMO_TEM_034_01 Page 2 of 8 Telecommunications Engineering (ELEC 30002) - Spring -20 - CW (Assignment 2) - A,AA&B - QP b. A cellular service provider decides to use a digital TDMA scheme which...
Question 2. (25 marks) Design a discrete time low-pass IIR filter operating at a sampling rate of 8 kHz such that its magnitude response is monotonic (i.e., smooth with no ripples) and satisfies the...
Question 2. (25 marks) Design a discrete time low-pass IIR filter operating at a sampling rate of 8 kHz such that its magnitude response is monotonic (i.e., smooth with no ripples) and satisfies the following conditions (i) The magnitude response has an attenuation of at least 20dB at 2000 Hz (ii) The magnitude response has an attenuation of at most 2dB at 1000 Hz Determine the transfer function, H(z) A. 120 Marks] sketch the Direct Form II structure of the...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA FM radio broadcasting utilizes the frequency band A. 0.665 MHz-1.6 MHz B. 80 MHz - 100 MHz C. 88 MHz 108 MHz 2. The pre-emphasis is generally used A. to improve the demodulator performance in the presence of noise in the received signal B. to improve the modulator performance C. to improve the stereophonic effect 3. The intermediate frequency of FM superheterodyne receiver is...
QUESTION 2 (25 MARKS) A chemical company is considering two processes for isolating DNA material. The...
QUESTION 2 (25 MARKS) A chemical company is considering two processes for isolating DNA material. The incremental cash flows between the two alternatives, J and S, have an incremental internal rate of return that is less than 40%, which is the MARR of the company. However, the company CEO prefers the more expensive process S. She believes the company can implement cost controls to reduce the annual cost of the more expensive process. By how much would she have to...
Question 2 ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the...
Question 2 ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the end of this paper. (5 marks) Explain the difference between eor and eors instruction. Use an example to show why both forms are useful. а. b. (5 marks) Explain using an example what the "Idr r3, [r7,#4]" instruction does. c. (10 marks) The following is the assembly language generated by a C compile type mystery, %function mystery: args 0, pretend = 0, frame =...
QUESTION 2 (25 MARKS) i. Identify and explain each of the below situations whether it is...
QUESTION 2 (25 MARKS) i. Identify and explain each of the below situations whether it is a change in policy, or a change in estimate or an error: The chief financial controller had announced that one line product has lost its customer appeal and will be phased out over the next 2 years. Due to this situation, a decision has been made to lower the estimates lives on related production equipment from the remaining 4 years to 2 years. (CLO2:PLO2:C1)(2...
Q1- Answer shortly the following questions (1 marks each, Max 2 to 3 lines) (8) 1-...
Q1- Answer shortly the following questions (1 marks each, Max 2 to 3 lines) (8) 1- During the reaction: aCH4 b 02cCO2 dH20, the carbon in CH is said to be oxidized. Why? 2- Define Z-scheme in photosynthesis and name the stages involved in the reaction. 3 What are the two main function of electron and proton transfer in photosynthesis? 4- The half-cell reaction of a metal M is: 5- 6- 7- 8- The standard cell potential is highly negative,...
4) Five audio channels each with a bandwidth of 20 kHz, are sampled at a 10% higher than the Nyquist rate and quantized using a 16 bit quantizer. These five channels are then time multiplexed. a. Find the overall bit rate of the output of multiplexer (4 Marks) and b. Find the minimum bandwidth required to transmit the output of the multiplexer when using 16-QAM with a raised cosine filter with a rolloff factor of 0.25 (2 Marks)
4) Five...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
3. a. If 30 MHz of total spectrum is allocated for a duplex wireless cellular system and each simplex channel has 25 kHz RF bandwidth, calculate the total number of channels per cell site, if the frequency reuse factor N = 4 cell is used. (5 marks) MEC_AMO_TEM_034_01 Page 2 of 8 Telecommunications Engineering (ELEC 30002) - Spring -20 - CW (Assignment 2) - A,AA&B - QP b. A cellular service provider decides to use a digital TDMA scheme which...
Question 2. (25 marks) Design a discrete time low-pass IIR filter operating at a sampling rate of 8 kHz such that its magnitude response is monotonic (i.e., smooth with no ripples) and satisfies the following conditions (i) The magnitude response has an attenuation of at least 20dB at 2000 Hz (ii) The magnitude response has an attenuation of at most 2dB at 1000 Hz Determine the transfer function, H(z) A. 120 Marks] sketch the Direct Form II structure of the...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA FM radio broadcasting utilizes the frequency band A. 0.665 MHz-1.6 MHz B. 80 MHz - 100 MHz C. 88 MHz 108 MHz 2. The pre-emphasis is generally used A. to improve the demodulator performance in the presence of noise in the received signal B. to improve the modulator performance C. to improve the stereophonic effect 3. The intermediate frequency of FM superheterodyne receiver is...
QUESTION 2 (25 MARKS) A chemical company is considering two processes for isolating DNA material. The incremental cash flows between the two alternatives, J and S, have an incremental internal rate of return that is less than 40%, which is the MARR of the company. However, the company CEO prefers the more expensive process S. She believes the company can implement cost controls to reduce the annual cost of the more expensive process. By how much would she have to...
Question 2 ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the end of this paper. (5 marks) Explain the difference between eor and eors instruction. Use an example to show why both forms are useful. а. b. (5 marks) Explain using an example what the "Idr r3, [r7,#4]" instruction does. c. (10 marks) The following is the assembly language generated by a C compile type mystery, %function mystery: args 0, pretend = 0, frame =...
QUESTION 2 (25 MARKS) i. Identify and explain each of the below situations whether it is a change in policy, or a change in estimate or an error: The chief financial controller had announced that one line product has lost its customer appeal and will be phased out over the next 2 years. Due to this situation, a decision has been made to lower the estimates lives on related production equipment from the remaining 4 years to 2 years. (CLO2:PLO2:C1)(2...
Q1- Answer shortly the following questions (1 marks each, Max 2 to 3 lines) (8) 1- During the reaction: aCH4 b 02cCO2 dH20, the carbon in CH is said to be oxidized. Why? 2- Define Z-scheme in photosynthesis and name the stages involved in the reaction. 3 What are the two main function of electron and proton transfer in photosynthesis? 4- The half-cell reaction of a metal M is: 5- 6- 7- 8- The standard cell potential is highly negative,...
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