Difference between revisions of "FSK Homework Assignment Questions"

From Derek
Jump to: navigation, search
(→‎Questions and Answers (Q&A))
(→‎Questions and Answers (Q&A))
 
(5 intermediate revisions by 3 users not shown)
Line 7: Line 7:
  
  
−
:'''Answer 1:'''  <blah blah>
+
:'''Answer 1:'''  :)
−
 
+
−
 
+
  
 
===Question 2===
 
===Question 2===
Line 15: Line 13:
  
 
:'''Answer 2:'''  <blah blah>
 
:'''Answer 2:'''  <blah blah>
 +
 +
===Question 3===
 +
To calculate the Noise Spectral Density in this assignment when compared to Assignment 1, we need to find the Energy per bits (Eb) correct? Was curious about this as there is no indication of Eb or Average power to calculate the Eb unless I am overthinking this aspect. Do we need Eb or average power to find the Noise Spectral Density of Assignment 2?
  
 
==Extra Advice==
 
==Extra Advice==
Line 20: Line 21:
 
* '''Do not use symbolic variables in matlab for the assignment!''' You should only use symbolic variables in Matlab when you want to simplify an algebraic mathematical expression, such as factorising a polynomial, or finding the mathematical integral or derivative. This is usually not helpful for a simulation. In a simulation you should be using arrays of numbers. These numbers can either be real or complex. All integration and differentiation should be done numerically, e.g. we approximate integration by summing. Summing should be done just as if you were programming in some other language like C, i.e. use a loop. Differentiation is approximated by taking differences. Again, this is likely to be done in a loop.
 
* '''Do not use symbolic variables in matlab for the assignment!''' You should only use symbolic variables in Matlab when you want to simplify an algebraic mathematical expression, such as factorising a polynomial, or finding the mathematical integral or derivative. This is usually not helpful for a simulation. In a simulation you should be using arrays of numbers. These numbers can either be real or complex. All integration and differentiation should be done numerically, e.g. we approximate integration by summing. Summing should be done just as if you were programming in some other language like C, i.e. use a loop. Differentiation is approximated by taking differences. Again, this is likely to be done in a loop.
  
−
* '''Plotting graphs.''' It is ok to have your signal and noise traces on the same plot, provided they are easy to see after printing in order to save paper. That is plot each trace in a different colour, or in different line styles. However, for demonstrating, at the least I would like to see 3 filter plots, 2 signal/noise plots (with no more than two traces each) and 2 SNR plots. Further to this, 4-5 exploratory plots of your own to demonstrate ownership of the assignment is sufficient.
+
* '''Plotting graphs.''' It is ok to have your signal and noise traces on the same plot, provided they are easy to see. So plot each trace in a different colour, or in different line styles. However, for demonstrating your results, I would like to see at least one time domain plot and two probability of error plots. Further to this, 4-5 exploratory plots of your own choosing to demonstrate ownership of the assignment is sufficient.
−
 
+
−
* '''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==

Latest revision as of 13:34, 29 April 2022

Introduction

Please feel free to use this page like a message board to ask any questions you like about the FSK homework assignment. Anyone can reply to a question, even other students.

Questions and Answers (Q&A)

Question 1

Answer 1:  :)

Question 2

Answer 2: <blah blah>

Question 3

To calculate the Noise Spectral Density in this assignment when compared to Assignment 1, we need to find the Energy per bits (Eb) correct? Was curious about this as there is no indication of Eb or Average power to calculate the Eb unless I am overthinking this aspect. Do we need Eb or average power to find the Noise Spectral Density of Assignment 2?

Extra Advice

  • Do not use symbolic variables in matlab for the assignment! You should only use symbolic variables in Matlab when you want to simplify an algebraic mathematical expression, such as factorising a polynomial, or finding the mathematical integral or derivative. This is usually not helpful for a simulation. In a simulation you should be using arrays of numbers. These numbers can either be real or complex. All integration and differentiation should be done numerically, e.g. we approximate integration by summing. Summing should be done just as if you were programming in some other language like C, i.e. use a loop. Differentiation is approximated by taking differences. Again, this is likely to be done in a loop.
  • Plotting graphs. It is ok to have your signal and noise traces on the same plot, provided they are easy to see. So plot each trace in a different colour, or in different line styles. However, for demonstrating your results, I would like to see at least one time domain plot and two probability of error plots. Further to this, 4-5 exploratory plots of your own choosing to demonstrate ownership of the assignment is sufficient.

See Also

Back

Retrieved from "https://www1.eleceng.adelaide.edu.au/personal/dabbott/wiki/index.php?title=FSK_Homework_Assignment_Questions&oldid=22865"