FM Homework Assignment Questions - Revision history

A1810137: /* Questions and Answers (Q&A) */

2024-03-19T13:33:25Z

Questions and Answers (Q&A)

← Older revision		Revision as of 23:03, 19 March 2024
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	Task 3 asks for vref which seems to simply be m(t) as their is no added noise.		Task 3 asks for vref which seems to simply be m(t) as their is no added noise.
	Are task 2 and task 3 identical?		Are task 2 and task 3 identical?


	===Question 27===		===Question 27===
	Hi, do you have a specific report template you want us to use to do the assignment report? Do we code the assignment in MatLab from scratch without a skeleton structure?		Hi, do you have a specific report template you want us to use to do the assignment report, or can we just freely write out the steps without any order? Do we code the assignment in MatLab from scratch without a skeleton structure?

	==Extra Advice==		==Extra Advice==

A1810137: /* Questions and Answers (Q&A) */

2024-03-19T13:31:29Z

Questions and Answers (Q&A)

← Older revision		Revision as of 23:01, 19 March 2024
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	Task 3 asks for vref which seems to simply be m(t) as their is no added noise.		Task 3 asks for vref which seems to simply be m(t) as their is no added noise.
	Are task 2 and task 3 identical?		Are task 2 and task 3 identical?


			===Question 27===
			Hi, do you have a specific report template you want us to use to do the assignment report? Do we code the assignment in MatLab from scratch without a skeleton structure?

	==Extra Advice==		==Extra Advice==

A1794134: /* Question 26 */

2024-03-12T01:07:24Z

Question 26

← Older revision		Revision as of 10:37, 12 March 2024
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	===Question 26===		===Question 26===
	~~task~~ 2 asks for signals for m(t), which i would assume are the sinewave and filtered random signal		Task 2 asks for signals for m(t), which i would assume are the sinewave and filtered random signal.
	~~task~~ asks for vref which seems to simply be m(t) as their is no added noise.		Task 3 asks for vref which seems to simply be m(t) as their is no added noise.
	Are task 2 and task 3 identical?		Are task 2 and task 3 identical?

A1794134 at 01:06, 12 March 2024

2024-03-12T01:06:53Z

← Older revision		Revision as of 10:36, 12 March 2024
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	===Question 25===		===Question 25===
	Hello all. I met a question on filter H4. When signal go through H4, it will lose power. So even the input signal doesn't contain noise part, the Lambda value cannot be 1 (what I got is 0.8782). In this case, the whole message signal cannot be filtered out completely from the output signal. Do you encounter a similar problem?		Hello all. I met a question on filter H4. When signal go through H4, it will lose power. So even the input signal doesn't contain noise part, the Lambda value cannot be 1 (what I got is 0.8782). In this case, the whole message signal cannot be filtered out completely from the output signal. Do you encounter a similar problem?

			===Question 26===
			task 2 asks for signals for m(t), which i would assume are the sinewave and filtered random signal
			task asks for vref which seems to simply be m(t) as their is no added noise.
			Are task 2 and task 3 identical?

	==Extra Advice==		==Extra Advice==

A1794134: /* Question 9 */

2024-03-12T00:52:04Z

Question 9

← Older revision		Revision as of 10:22, 12 March 2024
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	Do we use the frequency warping equation, substitute omega_d = 2 kHZ, find omega_a, substitute omega_a for omega_m in the H1(s) equation and then do the bilinear transformation on it? I ask because the frequency warping I'm doing in matlab doesn't seem to have any effect on the value of omega. Is that expected?		Do we use the frequency warping equation, substitute omega_d = 2 kHZ, find omega_a, substitute omega_a for omega_m in the H1(s) equation and then do the bilinear transformation on it? I ask because the frequency warping I'm doing in matlab doesn't seem to have any effect on the value of omega. Is that expected?

	:'''Answer 9:''' <blah blah> (i'm not sure why he said blah, blah this is quite a clear question, yes solve the frequency warping first, then use the new value of omega_d and apply the first order buttersworth filter)		:'''Answer 9:''' <blah blah> student awnser:(i'm not sure why he said blah, blah this is quite a clear question, yes solve the frequency warping first, then use the new value of omega_d and apply the first order buttersworth filter)

	===Question 10===		===Question 10===

A1794134: /* Question 9 */

2024-03-12T00:51:39Z

Question 9

← Older revision		Revision as of 10:21, 12 March 2024
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	Do we use the frequency warping equation, substitute omega_d = 2 kHZ, find omega_a, substitute omega_a for omega_m in the H1(s) equation and then do the bilinear transformation on it? I ask because the frequency warping I'm doing in matlab doesn't seem to have any effect on the value of omega. Is that expected?		Do we use the frequency warping equation, substitute omega_d = 2 kHZ, find omega_a, substitute omega_a for omega_m in the H1(s) equation and then do the bilinear transformation on it? I ask because the frequency warping I'm doing in matlab doesn't seem to have any effect on the value of omega. Is that expected?

	:'''Answer 9:''' <blah blah>		:'''Answer 9:''' <blah blah> (i'm not sure why he said blah, blah this is quite a clear question, yes solve the frequency warping first, then use the new value of omega_d and apply the first order buttersworth filter)

	===Question 10===		===Question 10===

A1697443 at 11:02, 6 April 2021

2021-04-06T11:02:32Z

← Older revision		Revision as of 20:32, 6 April 2021
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	===Question 24===		===Question 24===
	How do I generate log files on Matlab?		How do I generate log files on Matlab?

			===Question 25===
			Hello all. I met a question on filter H4. When signal go through H4, it will lose power. So even the input signal doesn't contain noise part, the Lambda value cannot be 1 (what I got is 0.8782). In this case, the whole message signal cannot be filtered out completely from the output signal. Do you encounter a similar problem?

	==Extra Advice==		==Extra Advice==
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	* '''Using unwrap in Matlab.''' Make sure you are using unwrap correctly. Unwrap is designed to be used on an entire array at once, rather than inside a loop on a single value at a time. This is because the kth output of unwrap for the kth input value depends on the (k-1)th input etc. Note that most functions in mMtlab are designed so they have array inputs and array outputs. In many cases it makes no difference if you call a function one value at a time, or a whole array at once, e.g. the cos function. If you use unwrap within your demodulation loop on a single value at a time, the phase conversion will not work properly. So, you should have a line prior to your demodulation loop: Y = unwrap(angle(X)); %Y will be an array of the same size as X		* '''Using unwrap in Matlab.''' Make sure you are using unwrap correctly. Unwrap is designed to be used on an entire array at once, rather than inside a loop on a single value at a time. This is because the kth output of unwrap for the kth input value depends on the (k-1)th input etc. Note that most functions in mMtlab are designed so they have array inputs and array outputs. In many cases it makes no difference if you call a function one value at a time, or a whole array at once, e.g. the cos function. If you use unwrap within your demodulation loop on a single value at a time, the phase conversion will not work properly. So, you should have a line prior to your demodulation loop: Y = unwrap(angle(X)); %Y will be an array of the same size as X




	==See Also==		==See Also==

A1065010 at 06:35, 1 April 2021

2021-04-01T06:35:14Z

← Older revision		Revision as of 16:05, 1 April 2021
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	==Introduction==		==Introduction==
	Please feel free to use this page like a message board to ask any questions you like about the FM [[Comms IV Assignment\|homework assignment]]. Anyone can reply to a question, even ~~pther~~ students.		Please feel free to use this page like a message board to ask any questions you like about the FM [[Comms IV Assignment\|homework assignment]]. Anyone can reply to a question, even other students.

	==Questions and Answers (Q&A)==		==Questions and Answers (Q&A)==

A1779565 at 09:11, 5 May 2020

2020-05-05T09:11:24Z

← Older revision		Revision as of 18:41, 5 May 2020
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	How do I generate log files on Matlab?		How do I generate log files on Matlab?

	~~===Question 25===~~
	~~In section 6, what is the formula for theoretical output SNR?~~

	==Extra Advice==		==Extra Advice==

A1779565 at 08:44, 29 April 2020

2020-04-29T08:44:08Z

← Older revision		Revision as of 18:14, 29 April 2020
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	How do I generate log files on Matlab?		How do I generate log files on Matlab?

			===Question 25===
			In section 6, what is the formula for theoretical output SNR?

	==Extra Advice==		==Extra Advice==