Mastering Signal Functions: Expert Answers to Your Questions

  • Context: Undergrad 
  • Thread starter Thread starter kevin_obl
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Discussion Overview

The discussion revolves around questions related to signal functions, specifically focusing on their representation in both time and frequency domains. Participants are exploring the correctness of their answers to specific signal function questions and seeking clarification on operations involving these functions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant presents questions regarding the representation of signal functions and seeks validation for their answers.
  • Another participant explains that a sine wave in the time domain corresponds to a delta function in the frequency domain, noting the relationship between amplitude, frequency, and period.
  • There is a request for visual aids to better understand the concepts discussed, indicating a need for clarification on the representation of signals.
  • A separate participant inquires about the addition and multiplication of two functions, indicating further exploration of operations involving signal functions.

Areas of Agreement / Disagreement

Some participants appear to agree on the correctness of the answers to question 2, while there is uncertainty expressed regarding the overall understanding and representation of the signal functions. The discussion remains unresolved on several points, particularly regarding the operations on functions.

Contextual Notes

Participants have not fully clarified assumptions regarding the definitions of the signal functions or the specific context of their questions. There are also unresolved mathematical steps related to the operations on the functions.

kevin_obl
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Hi, Just got some question with some function.. which I'm not really sure about the answer!

Question as below

1-1.jpg


My answer for Question 1
3-2.jpg

Is that the right way to present the signal?


My answer for Question 2

For f(t-2)
ft-2.jpg


For f(2-t)
f2-t.jpg


For f(-t)
f-t.jpg


For -f(t) [Not really sure about this] Am I do it correctly?
-ft.jpg
 
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A sine wave in the time domain has a delta function representation in the frequency domain. The height of the delta function is related to the amplitude of the sine wave; the position along the frequency axis is related to the frequency of the sine wave. Obviously, smaller period implies higher frequency.

The answers to question 2 appear to be correct.

- Warren
 
chroot said:
A sine wave in the time domain has a delta function representation in the frequency domain. The height of the delta function is related to the amplitude of the sine wave; the position along the frequency axis is related to the frequency of the sine wave. Obviously, smaller period implies higher frequency.

The answers to question 2 appear to be correct.

- Warren


Am I doing it wrongly?? Since the amplitudes are given as 0.5 for part a) and part c) and 1 for part b).. That's why I just wrote them on the frequency domain.
Is that any possible way for you to show me something in picture?? Thank a lot for your help.. Appreciated
 
Anyone here know how to add and multiply two function together??

Question Part1
1-1.jpg

Question Part2
2-1.jpg
 

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