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battousai_47
Joined: 03 Apr 2009
Posts: 10
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 03 Apr 2009 15:36 help plzz am running out of time |
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hi every 1 ,,how r u??
i'm actually new to this forum,i liked it very much.
my name is battousai,n am studyin computer engineering,
i'm abt to graduate the next 3 months and i'm very busy with my graduation research,
am having a real huge problems and i really need ur help,
my first problem is am new to matlab,
am using matlaab simulink n am trying to input a sine wave n see its frequency spectrum by using the (spectrum scope)
bt am nt doin well n it keeps tellin me **error**
i wish tht anybody helps me coz am runnung out of time.thank u all
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mhnd
Joined: 17 Dec 2007
Posts: 3
Helped: 1
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11 Apr 2009 3:02 Re: help plzz am running out of time |
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Hello
please find below a link to a pdf file explaining the first steps in matlab simulink and doing the thing you want
http://www.ecn.purdue.edu/VISE/ece438L/lab3/pdf/lab3.pdf
and you can find attached the files needed for the tutorial
just unzip and put them in the working directory
by the way: spectrum scope doesn't draw the frequency analysis of the signal
it calculate and estimation of the spectrum using the periodogram estimator then draws the results , and it's usually done for random signals not deterministic
anyway follow the tutorial in the file and i hope it will be ok
if you have any question don't hesitate
Regards,
Mouhannad
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battousai_47
Joined: 03 Apr 2009
Posts: 10
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12 Apr 2009 10:42 Re: help plzz am running out of time |
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hi,i want to thank u for your help,am very thankfull,
now i think got to knw how to draw the frequency analysis by using spectrum analyzer,
As you knw am running out of time ,only few days left for my project to b delievrd n disscused*,
anyway i'm trying to input an NRZ signal(by using bernoulli block+unipolar to bipolar converter) to a phase locked loop .
nrz>>>raised cosine filter>>>square(nonlinear)>>>pll
i've built the pll n the nrz bt still un able to connect the rest of the circuit .
my project is called ((bit synchronizer))
plz help me if u can
Regards,
Ahmed
Added after 27 minutes:
Hi mohnnad
i'm bothering u with my questions,but am really running out of time,i didnt expect any1 to reply on my subject.
thank u very much.
now as i told b4
am trying to build a bit synchronizer using matlab simulink
my prof. plan is to connect
nrzlevel signal(nrzl) >>>raised cosine filter>>>squar the signal in somehow>>>pll(phase locked loop)
i've desinged the pll .bt it's really hard to connect the rest
by the way the frequency of the nrz should be equal to (10khz)
thank u for ur help
Regards,
Ahmed
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mhnd
Joined: 17 Dec 2007
Posts: 3
Helped: 1
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12 Apr 2009 20:15 Re: help plzz am running out of time |
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Hi Ahmed,
Am sorry i didn't know what's your question specifically
indeed i think you are having some problems in types conversions
If that was the problem try using "To Frame" block from signal processing blockset
to convert from sample based signals to frame based or to do the inverse
if you have any question please don't hesitate
Regards,
Mouhannad
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battousai_47
Joined: 03 Apr 2009
Posts: 10
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14 Apr 2009 21:12 Re: help plzz am running out of time |
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hi mohannad,
ok let get to it step by step.
1st i'm tryin to generat an nrz signal using bernoulli generator and tht was successfully done,
the next step is to get its spectrum shown using some sort of spectrum scope or somthing like tht,
i connected the nrz to a spectrum scope bt all i've got is nothing
all i want nw is to generat a non return to zero level signal and see it's frequency spectrum. i wish u can help me
Regards,
Ahmed
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