From fowler at ece.msstate.edu Fri Sep 7 14:53:19 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Fri Sep 7 15:55:02 2007 Subject: [ece8453] Re: ECE 8453 - HW#2 In-Reply-To: <4382539.1189177394143.JavaMail.ltb24@msstate.edu> References: <4382539.1189177394143.JavaMail.ltb24@msstate.edu> Message-ID: <46E1AC2F.1070506@ece.msstate.edu> > I am working on the homework and had a question. In part 3, what do > you mean by "Gaussian window?" Is that just asking me to collect N > samples from the Gaussian curve (gaussmf)? How do I determine the > range of the values to fill the g vector? Thanks for your time. I gave the formula for the Gaussian window in class. It is not gaussmf() or the Gaussian pdf, which has a different normalization. The window function is sampled at the same sampling rate as the original signal. -- ======================================================================= | Dr. James E. Fowler | | Professor | | Department of Electrical & Computer Engineering | | GeoResources Institute (GRI) | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 406 Hardy Rd. | HPC2: Rm. 208, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | ======================================================================= From fowler at ece.msstate.edu Mon Sep 10 21:40:01 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Mon Sep 10 21:40:11 2007 Subject: [ece8453] Re: HW#2 In-Reply-To: <8225728.1189457955960.JavaMail.hy58@msstate.edu> References: <8225728.1189457955960.JavaMail.hy58@msstate.edu> Message-ID: <46E60001.1050108@ece.msstate.edu> > Can I use the Matlab function "gausswin(L,alpha)" with L=N and > alpha= 1/sigma to generate the gaussian window instead of the formular > you give us at class? No. gausswin() does not have the correct normalization. -- ======================================================================= | Dr. James E. Fowler | | Professor | | Department of Electrical & Computer Engineering | | GeoResources Institute (GRI) | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 406 Hardy Rd. | HPC2: Rm. 208, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | ======================================================================= From fowler at ece.msstate.edu Wed Sep 12 15:35:59 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Wed Sep 12 17:25:05 2007 Subject: [ece8453] Re: HW2 In-Reply-To: <2489624.1189628471738.JavaMail.hrk15@msstate.edu> References: <2489624.1189628471738.JavaMail.hrk15@msstate.edu> Message-ID: <46E84DAF.1080005@ece.msstate.edu> > In the part a) of problem 3, the third statemant asks to > create a N X N matrix by multiplying a 1 X N signal Matrix with a N X N > matrix, which actually gives a 1 X N matrix.Can you please help me out > in creating that matrix of N X N size.Thanks for u time. That's not what that statement says. It says that you need to multiply each column of G by signal, and then assemble the results into NxN matrix X. A column of G and signal are both Nx1 - you do an element-by-element multiply (.* in Matlab), resulting in another Nx1 vector. -- ======================================================================= | Dr. James E. Fowler | | Professor | | Department of Electrical & Computer Engineering | | GeoResources Institute (GRI) | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 406 Hardy Rd. | HPC2: Rm. 208, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | ======================================================================= From fowler at ece.msstate.edu Fri Sep 14 14:48:51 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Fri Sep 14 15:10:01 2007 Subject: [ece8453] ECE8453 Homework #2 Solutions Message-ID: <46EAE5A3.8010403@ece.msstate.edu> Solutions to Homework #2 are now on the class website. -- ======================================================================= | Dr. James E. Fowler | | Professor | | Department of Electrical & Computer Engineering | | GeoResources Institute (GRI) | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 406 Hardy Rd. | HPC2: Rm. 208, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | ======================================================================= From fowler at ece.msstate.edu Tue Sep 25 09:03:14 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Tue Sep 25 09:29:34 2007 Subject: [ece8453] Upcoming Schedule & Midterm Exam Message-ID: <46F91522.1040600@ece.msstate.edu> As you can see from the syllabus, the Midterm Exam is coming up soon. Observe also that the university is holding Fall Break this year Monday, Oct. 1, to Tuesday, Oct. 2, so we will not have class Oct. 2. Homework #4, which will be handed out in class on Thursday, Sep. 27, is going to be due Tuesday, Oct. 9. Homework #4 will be the last homework assigned before the midterm exam. The Midterm Exam will be handed out in class Tuesday, Oct. 9, and will be due in class Thursday, Oct. 18. The exam will consist of a combination of theoretical exercises (similar to Homework #1), and Matlab implementations (similar to Homeworks #2, #3, and #4). I will be out of the country from the afternoon of Oct. 9 to the evening of Oct. 16, so we will not have class either Oct. 11 or Oct. 16. Finally, note that midterm grades are due to the registrar Oct. 15. Although the university does not require midterm grades for graduate classes, I often provide them simply as a means of giving the students some feedback. However, this semester, due to the fact that we will not have had the Midterm Exam by the midterm-grade deadline, I will not be giving midterm grades for the course. -- ======================================================================= | Dr. James E. Fowler | | Associate Professor | | Department of Electrical & Computer Engineering | | Engineering Research Center | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 216 Simrall | ERC: Rm. 207, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | ======================================================================= _______________________________________________ ece8453 mailing list ece8453@ece.msstate.edu http://www2.ece.msstate.edu/mailman/listinfo/ece8453mm _______________________________________________ ece8453 mailing list ece8453@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece8453ma From fowler at ece.msstate.edu Tue Sep 25 13:19:05 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Tue Sep 25 13:19:08 2007 Subject: [ece8453] Re: Homework # 3 In-Reply-To: <002001c7ff9f$1d56cfe0$58046fa0$@edu> References: <002001c7ff9f$1d56cfe0$58046fa0$@edu> Message-ID: <46F95119.4050508@ece.msstate.edu> > In the problem # 2 of homework 3, I could not get through the > representing the scaled and translated form of wavelet function. We have > 1024 samples of both scaling function and wavelet function, but the > index of \psi(2*i-k) goes beyond the limit. Can you please help me in > representing scaled and translated wavelet function in Matlab? You cannot simply do the scaling and translation in Matlab as the mathematics imply, i.e, by modification of the indexing. However, you should be able to figure out what each individual function should look like, and generate the functions directly. Note that all the scaled and translated functions must be exactly 1024 samples long. -- ======================================================================= | Dr. James E. Fowler | | Professor | | Department of Electrical & Computer Engineering | | GeoResources Institute (GRI) | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 406 Hardy Rd. | HPC2: Rm. 208, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | ======================================================================= From fowler at ece.msstate.edu Fri Sep 28 15:37:06 2007 From: fowler at ece.msstate.edu (James E. Fowler) Date: Fri Sep 28 21:04:46 2007 Subject: [ece8453] ECE8453 Homework #3 Solutions Message-ID: <46FD65F2.10903@ece.msstate.edu> Solutions to Homework #3 are now on the class website. -- ======================================================================= | Dr. James E. Fowler | | Professor | | Department of Electrical & Computer Engineering | | GeoResources Institute (GRI) | | Mississippi State University | | | | fowler@ece.msstate.edu | | http://www.ece.msstate.edu/~fowler | | | ---------- Postal Address ---------------------- Contact Info --------- | Box 9571, 406 Hardy Rd. | HPC2: Rm. 208, +1 (662)325-2578 | | Mississippi State, MS 39762 | ECE: Rm. 406, +1 (662)325-3640 | | USA | Fax: +1 (662)325-7692 | =======================================================================