From tm334 at ece.msstate.edu Thu Apr 2 15:06:24 2009 From: tm334 at ece.msstate.edu (Tao Ma) Date: Thu Apr 2 15:11:18 2009 Subject: [ece3163] Recitation Tonight Canceled! Message-ID: <49D51AC0.4090503@ece.msstate.edu> For the security concern, we will cancel the recitation tonight. This week's recitation is to review exam 2. If you still have questions about it, you can come to see me in office hours or by appointment. Have a safe evening! -Tao -------- Original Message -------- Subject: Recitation Date: Thu, 2 Apr 2009 14:48:14 -0500 From: Ashley Stough To: 'Tao Ma' Tao, Are we having the recitation tonight? I wasn't sure with the weather and flooding today. There is another line coming through later this evening. -Ashley -- -Tao -------------- next part -------------- Skipped content of type multipart/related From picone at ece.msstate.edu Sun Apr 5 11:37:00 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Sun Apr 5 11:37:33 2009 Subject: [ece3163] RLC homework solutions Message-ID: <49D8DE2C.9020003@ece.msstate.edu> I have posted the solutions I received for the RLC problem in the homework directory: http://www.isip.piconepress.com/publications/courses/ece_3163/homework/current/ I have also returned comments and grades to those who turned these in. Several of these solutions are very nicely done, showing both theory and simulation results. I would encourage you to review the solutions if you are unclear about the solution to this problem. You might also review the lecture on Bode plots, which essentially provided a theoretical solution to this problem :) -Joe From picone at ece.msstate.edu Wed Apr 8 14:34:20 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Wed Apr 8 14:34:46 2009 Subject: [ece3163] exam no. 3 Message-ID: <49DCFC3C.2010603@ece.msstate.edu> We decided in class today that exam no. 3 will be held at the originally scheduled time. -Joe From picone at ece.msstate.edu Mon Apr 13 23:37:47 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Mon Apr 13 23:38:41 2009 Subject: [ece3163] mythbusters Message-ID: <49E4131B.4030005@ece.msstate.edu> This doesn't have a lot to do with Signals and Systems, but it is one pretty cool video: http://blog.wired.com/gadgets/2009/04/video-mythbuste.html Have you ever seen something move that fast on the ground? -Joe From picone at ece.msstate.edu Thu Apr 16 13:32:21 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Thu Apr 16 13:32:54 2009 Subject: [ece3163] second RLC assignment Message-ID: <49E779B5.1080602@ece.msstate.edu> I have posted the solutions students submitted for the second RLC circuit question. The solutions are in files named rlc2* in the homework directory. Enjoy! -Joe From picone at ece.msstate.edu Mon Apr 20 19:43:54 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Mon Apr 20 19:44:30 2009 Subject: [ece3163] exam no. 3 will focus on Message-ID: <49ED16CA.8010801@ece.msstate.edu> problems from Chaps. 7, 8 and 9 as I mentioned in class. Most likely there will be one problem from each chapter - at the most. I might revert to fewer problems due to time constraints. We will save Chaps. 10 and 11 for the final exam. -Joe From picone at ece.msstate.edu Tue Apr 21 10:19:29 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Tue Apr 21 10:19:54 2009 Subject: [ece3163] Test 3 and final exam (213 Simrall) In-Reply-To: <1240326963.11888.1.camel@lappy> References: <1240326963.11888.1.camel@lappy> Message-ID: <49EDE401.5060307@ece.msstate.edu> > I'm assuming that the rules for test 3 > are the same as 1&2, namely, one sheet of notes and the printed z > transform tables? > This is correct. The third exam is the same format as the previous two. As I mentioned in class, the final exam will be open books and notes and will require your laptop. You will need to email me a Word document containing your Matlab plots and code. The final exam will be held in 213 Simrall, which has ample power outlets for your laptops. -Joe From picone at ece.msstate.edu Wed Apr 22 07:06:17 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Wed Apr 22 07:06:42 2009 Subject: [ece3163] Re: HW 7.4a In-Reply-To: <1240360190.15767.1.camel@lappy> References: <1240360190.15767.1.camel@lappy> Message-ID: <49EF0839.1080302@ece.msstate.edu> > I was looking over the homework, and I'm completely puzzled by the > solution to 7.4a, specifically dealing with the cos^2. Is that some trig > identity I'm unaware of? Good observation. It appears they cited the trig identity incorrectly. They should have used: cos(x)*cos(x) = 0.5 + 0.5 * cos(2x) -Joe From picone at ece.msstate.edu Wed Apr 22 07:14:25 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Wed Apr 22 07:14:53 2009 Subject: [ece3163] Re: HW 7.26 / Sec 7.5 In-Reply-To: <1240375234.49ee9fc24e7fe@webmail.msstate.edu> References: <1240375234.49ee9fc24e7fe@webmail.msstate.edu> Message-ID: <49EF0A21.2000609@ece.msstate.edu> > I'm a little confused about something -- Is the transfer function H(z) defined > in Section 7.5 the same as other "Transfer functions," specifically is H(z) > defined as Y(z)/X(z) ? It only defines the system in terms of a ratio of > polynomials A(z) and B(z). Perhaps I don't quite understand the question, but the transfer function in 7.5 is Y(z) / X(z). It is written as a ratio of polynomials because that is the most convenient/useful form for us to work with (much like we looked specifically at Laplace transforms that were the ratio of polynomials). > Also, if that is the case, could one solve problem 7.26 simply by taking the > z-transform of y(t) and x(t) and dividing? I'm not exactly sure where the form > of the result came from in the HW solution, especially the C(z)/A(z) term. The > B(z)/A(z) seems natural, but not the first term. I chose this problem to show you the influence of initial conditions. Remember we define the transfer function as the ratio of output to input for ZERO initial conditions. In this problem you are given the input, the output for that input, and knowledge of the initial conditions for y[n] (x[n] is zero for n < 0). Hence, in computing the transfer function, you must remove the component of the response that is due to the initial condition, and then you can take Y[z]/X[z] for what remains. The solution in the homework solutions does this using an approach where they try to decouple the z-transform into its two components so that the component due to the initial condition can be removed. -Joe From tm334 at ece.msstate.edu Wed Apr 22 11:30:54 2009 From: tm334 at ece.msstate.edu (Tao Ma) Date: Wed Apr 22 11:30:45 2009 Subject: [ece3163] Recitation on next Monday Message-ID: <49EF463E.1090401@ece.msstate.edu> Guys, We will still have recitation on next Monday. Chapter 11 will be covered quickly and we can discuss your questions after that. I hope to see you there. -- -Tao From picone at ece.msstate.edu Fri Apr 24 06:38:47 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Fri Apr 24 06:39:09 2009 Subject: [ece3163] exam no. 3 Message-ID: <49F1A4C7.6010504@ece.msstate.edu> (I am resending this to make sure everyone got it.) Grades were much better on this exam. The results are below. If you send me an email, I'll send you your grade. -Joe ========================== E1 E2 E3 Avg 68 67 75 Median 69 78 83 Stdev 20 27 21 Min 23 3 15 Max 100 99 100 Histogram: < 10 0 2 0 10-19 0 1 1 20-29 2 0 0 30-39 2 2 1 40-49 0 2 2 50-59 3 0 1 60-69 6 2 1 70-79 5 7 3 80-89 4 7 12 > 90 4 3 4 Total: 26 26 25 From picone at ece.msstate.edu Fri Apr 24 13:23:55 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Fri Apr 24 13:24:22 2009 Subject: [ece3163] final exam Message-ID: <49F203BB.5050002@ece.msstate.edu> I know a number of you have a heavy final exam schedule in the first part of the week. I am going to be giving an exam on Thurs. from noon to 3 PM for at least one student. I thought I would offer this opportunity to other students as well. If you have a need to take the exam at this time, let me know ASAP. In your request, tell me what your current exam schedule looks like. Thanks, -Joe From picone at ece.msstate.edu Mon Apr 27 10:41:49 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Mon Apr 27 10:41:56 2009 Subject: [ece3163] nice article on the Netflix challenge... Message-ID: <49F5D23D.4050005@ece.msstate.edu> Here is a nice article about the Netflix challenge that we discussed in class: http://www.nytimes.com/2008/11/23/magazine/23Netflix-t.html?pagewanted=1&_r=1&ref=magazine If you aren't familiar with this competition, information about the Netflix prize can be found at: http://www.netflixprize.com/index Enjoy, -Joe From picone at ece.msstate.edu Tue Apr 28 13:38:32 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Tue Apr 28 13:38:39 2009 Subject: [ece3163] final exam converted to a take-home exam Message-ID: <49F74D28.5030805@ece.msstate.edu> Due to the MATLAB licensing issue we faced today (students were having trouble getting MATLAB licenses), we decided to convert the final exam to a take-home exam. The source document for the exam is located at: http://www.isip.piconepress.com/publications/courses/ece_3163/exams/2009_spring/exam_04_v0.docx There is a pdf available as well. The exam is due by 11:59 PM on Thursday, April 30. You can email me an electronic copy, or drop a hardcopy off in my department mailbox. I would prefer electronic copies. Note the ECE Office closes around 5 PM on Thursday, so if you are going to turn in hardcopy, please drop it off before the office closes. I will give 5 pts. extra credit on problem no. 1 for a solution in PSPICE in addition to your solution in MATLAB (not as a substitute). Please note that your solutions might be logical and well-organized. Random disconnected thoughts will receive a very predictable grade :) Also, I expect you to use MATLAB to solve these problems where indicated, though you can use other tools, such as calculators and PSPICE, to verify your solutions. Show all your work, including plots and MATLAB code with comments. You are expected to work the exam alone. We will use the honor system. You can consult with your friends on general MATLAB issues, but your solutions must be your own work. Hopefully, this will work to your advantage and make the exam much easier for you. Let me know if you have questions. Good luck, -Joe P.S. The make-up exam is obviously canceled. From picone at ece.msstate.edu Tue Apr 28 15:44:14 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Tue Apr 28 15:44:21 2009 Subject: [ece3163] [Fwd: final exam converted to a take-home exam] Message-ID: <49F76A9E.9010702@ece.msstate.edu> One more thing: I will also give an extra 10 pts to anyone who can use state variables in MATLAB to derive a solution that matches their conventional solution to prob. 1. This would be a nice demonstration of your ability to learn new concepts quickly. MATLAB has some nice support for state variables. -Joe -------- Original Message -------- Subject: final exam converted to a take-home exam Date: Tue, 28 Apr 2009 13:38:32 -0500 From: Joseph Picone Reply-To: joseph.picone@gmail.com To: ece3163@ece.msstate.edu Due to the MATLAB licensing issue we faced today (students were having trouble getting MATLAB licenses), we decided to convert the final exam to a take-home exam. The source document for the exam is located at: http://www.isip.piconepress.com/publications/courses/ece_3163/exams/2009_spring/exam_04_v0.docx There is a pdf available as well. The exam is due by 11:59 PM on Thursday, April 30. You can email me an electronic copy, or drop a hardcopy off in my department mailbox. I would prefer electronic copies. Note the ECE Office closes around 5 PM on Thursday, so if you are going to turn in hardcopy, please drop it off before the office closes. I will give 5 pts. extra credit on problem no. 1 for a solution in PSPICE in addition to your solution in MATLAB (not as a substitute). Please note that your solutions might be logical and well-organized. Random disconnected thoughts will receive a very predictable grade :) Also, I expect you to use MATLAB to solve these problems where indicated, though you can use other tools, such as calculators and PSPICE, to verify your solutions. Show all your work, including plots and MATLAB code with comments. You are expected to work the exam alone. We will use the honor system. You can consult with your friends on general MATLAB issues, but your solutions must be your own work. Hopefully, this will work to your advantage and make the exam much easier for you. Let me know if you have questions. Good luck, -Joe P.S. The make-up exam is obviously canceled. From picone at ece.msstate.edu Wed Apr 29 11:29:02 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Wed Apr 29 11:29:25 2009 Subject: [ece3163] Re: Exam Question Question In-Reply-To: References: Message-ID: <49F8804E.4090603@ece.msstate.edu> > The wording for problem 1, part d is giving me trouble. "Plot the > frequency response of the impulse response," it says. Do you mean the > frequency /spectrum/ of the impulse response? The reason this is > bothering me is because it sounds redundant - the impulse response is > the frequency response/transfer function of the system. So, are you > looking for the frequency response of the frequency response (if so, > what does this mean?), or just the frequency response? I would like you to compute the frequency response of the impulse response you generated and show me: (1) it matches with what you would expect from the circuit. (2) it matches what you would get using other methods. (3) it matches what you would get if evaluated the transfer function (s=jw). Does that help? -Joe From picone at ece.msstate.edu Thu Apr 30 09:33:25 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Thu Apr 30 09:33:33 2009 Subject: [ece3163] final exam prob. no. 1 In-Reply-To: <58a14e7f0904292228ja79172bmbc65365ebb4710e5@mail.gmail.com> References: <58a14e7f0904292228ja79172bmbc65365ebb4710e5@mail.gmail.com> Message-ID: <49F9B6B5.4050403@ece.msstate.edu> > I managed to do number 1 part b without MATLAB. Do I still need to do > the problem with MATLAB without any penalty? > Yes, you need to use MATLAB on this problem to get credit. You can verify your answer with hand calculations. However, the point of the problem was to make sure you knew how to work circuits problems in MATLAB. So I want to see the MATLAB solution. -Joe From picone at ece.msstate.edu Thu Apr 30 11:33:33 2009 From: picone at ece.msstate.edu (Joseph Picone) Date: Thu Apr 30 11:33:40 2009 Subject: [ece3163] final exam: problem no. 2 In-Reply-To: <1241108903.49f9d1a7ea5b8@webmail.msstate.edu> References: <1241108903.49f9d1a7ea5b8@webmail.msstate.edu> Message-ID: <49F9D2DD.3030301@ece.msstate.edu> > Is the signal in problem 2 a continuous or discrete signal? It is continuous. > but you ask for the > convolution with the unit pulse(delta[n]), What I meant by that is the unit pulse for a CT system. This is the signal defined as: x(t) = 1 0 <= t <= 1 = 0 elsewhere I am about to go offline for the next 8 hours. Call me at 662-312-4209 if you need anything. -Joe