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Althea Fortes

E-mail: harpy_125@yahoo.com

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Comments and Ratings by Althea		1 - 1 of 1
Updated	File	Comments	Rating
17 Jun 2009	mmread Read virtually any media file in Windows, Linux, or Mac. Author: Micah Richert	i am a beginner to MATLAB and i am using matlab 6.5.1, the following programs "MMPLAY, MMREAD, and MMWRITE", after unzipping it where should be the items be placed. what i mean is on what specific folder? like .m, .dll, *.mex4 and etc. well the program might help to our project from playing MPEG file. thank you in advance

Top Tags Applied by Althea	1 - 4 of 4
antenna, communications, demodulation, dsp

Files Tagged by Althea					View all 1 - 4 of 4
Updated		File	Tags	Downloads (last 30 days)	Comments	Rating
29 May 2009		MakeAudio RingToneComposer Make audio, play audio, compose ring tone..!! Author: Tijil Thomas	dsp, audio, signal processing, gui	6	0
22 Jan 2008		QPSK modulation gives u qpsk of even length message signals and displays the plot Author: Ganesh AS	communications, length, modulation, qpsk, message signal, types	25	3	2.25 2.2 \| 5 ratings
11 May 2007		Broad Band Antenna THIS IS BROAD BAND LOG PERIODIC ANTENNA DESIGNING PROG. Author: ANUJ TRIPATHI	wireless communicatio..., antenna, periodic, broadband, ddnews, wireless	12	3	1.0 1.0 \| 2 ratings
23 May 2006		Phase Modulation and Demodulation Phase Modulation and Demodulation. Author: Farhat Masood	demodulation, modulation, phase, phases, signal shift, fm	22	7	4.5 4.5 \| 6 ratings

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File	Broad Band Antenna

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11 May 2007		Broad Band Antenna THIS IS BROAD BAND LOG PERIODIC ANTENNA DESIGNING PROG. Author: ANUJ TRIPATHI	wireless communicatio..., antenna, periodic, broadband, ddnews, wireless	12	3	1.0 1.0 \| 2 ratings

Comments and Ratings Matching Althea's Watch List			1-3 of 3
Date	File	Comment by	Comments	Rating
01 Mar 2008	Broad Band Antenna THIS IS BROAD BAND LOG PERIODIC ANTENNA DESIGNING PROG.	MIE CANZ	8 S A NCE PROGRAM	Comment only
02 Jun 2007	Broad Band Antenna THIS IS BROAD BAND LOG PERIODIC ANTENNA DESIGNING PROG.	Duane Hanselman	Here is the M-file as posted. It contains non-MATLAB code: %DESIGNING OF A LOG-PERIODIC ANTENNA FOR RECIEVING DD1,DD2 &DD-NEWS CHANNEL %VHF CHANNELS-- % 2,3,4 -- 54,60,66,72MHz % 5,6 -- 76,82,88MHz % 7,8,9,10,11,12,13 -- 172,180,186,192,198,204,210,216 MHz %UHF CHANNELS % 14-83 -- 470-890MHz %1CM=.390625INCH clc clear all disp('DESIGNING OF A LOG-PERIODIC ANTENNA FOR RECIEVING DD1,DD2 &DD-NEWS CHANNEL'); disp(' '); disp(' '); float double a; float double gtl; float double fbw; float double bar1; float double bs1; float double l1; float double l2; float double D1; int n; int i; float double sigma1; float double lmax; float double s(100); float double l(100); float double d(100); float double bs; float double l1; float double l2; gtl=0.0; x=input('Enter the value of lower frequency='); y=input('Enter value of upper frequency='); dmax=input('Enter value of largest element diameter(in inches)='); disp(' '); disp('Directivity 8dB'); fbw=2(y-x)/(x+y); fprintf('Fractional bandwidth =%f \n',fbw); sigma=.157; tau=.865; a=atan((1-tau)/(4sigma)); fprintf('Angle alpha =%f radian \n',a); bar=1.1+7.7(1-.865)^2cot(a); bar1=bar/(1000000); fprintf('Active region bandwidth =%f MHz \n',bar1); s=y/x; bs=sbar; bs1=bs/1000000; fprintf('Designed bandwidth =%f MHz \n',bs1); c=310^8; l1=c/x; fprintf('Max. wavelength =%f meters\n',l1); l2=l13.2805; fprintf('Max wavelength =%f feets\n',l2); L=(l1/4)(1-(1/bs))cot(a); fprintf('TOTAL LENGTH =%f meters\n',L); N=1+(log(bs)/log(1/tau)); n=round(N); fprintf('No. of elements is=%f \n',n); sigma1=sigma/sqrt(tau); fprintf('Relative mean spacing =%f \n',sigma1); lmax=l2/2; fprintf('Max length =%f feet \n',lmax); za=120(log(s)-2.25); fprintf('Average characteristic impedence =%f ohms \n',sigma1); Rin=50; V=za/Rin; VAR=1.2; zo=VARRin; s=3/4cosh(zo/120); fprintf('Center-to-center spacing of feeder line conducter =%f \n',s); L(n)=lmax; d(n)=dmax; s(n)=s; for i=n-1:-1:1 s(i)=s(i+1)tau; L(i)=L(i+1)tau; d(i)=d(i+1)*tau; disp(' '); fprintf('INDIVIDUAL LENGTHS of %d th element is %f meters \n',i,L(i)); fprintf('INDIVIDUAL spacing of %d th element is %f meters \n',i,s(i)); fprintf('INDIVIDUAL dimeter of %d th element is %f meters \n \n',i,d(i)); gtl=gtl+L(i); end fprintf('Gross total length req. for all elements is %f meters \n',gtl); disp(' '); disp(' '); disp('THIS PROGRAM IS SUBMITTED BY- '); disp(' ANUJ KUMAR TRIPATHI'); disp(' ELECTRONICS & COMMUNICATION '); disp(' THAPAR INSTITUTE OF ENGG. AND TECH. ');	1
11 May 2007	Broad Band Antenna THIS IS BROAD BAND LOG PERIODIC ANTENNA DESIGNING PROG.	C. S.	This is a poorly written script. It should be removed from the FEX.	1

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