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magnetra
Joined: 21 Apr 2005
Posts: 275
Helped: 3
Location: 27.45N, 85.20E KTM, NP
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 02 Dec 2006 19:09 Digital Modulation Spectrum in Matlab |
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The Communication Blockset of Matlab provides digital modulation functions like pskmod, qam, fskmod. However, Matlab uses baseband representation (lowpass equivalenta) of modulated signal. I need to display the frequency domain representation of the modulated signal. How do I proceed? How do I obtain passband spectrum from the lowpass representation?
M
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02 Dec 2006 19:09 Ads |
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magnetra
Joined: 21 Apr 2005
Posts: 275
Helped: 3
Location: 27.45N, 85.20E KTM, NP
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03 Dec 2006 7:52 Digital Modulation Spectrum in Matlab |
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Help Needed! URGENT.
M
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m_llaa
Joined: 12 Mar 2006
Posts: 277
Helped: 23
Location: My Love Iran
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03 Dec 2006 8:22 Digital Modulation Spectrum in Matlab |
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Hi
u can multiply baseband signal to exp(-j2pift) for bandpass signal.
then u can use just fft block or spectrum block to see spectrum of your bandpass signal.
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magnetra
Joined: 21 Apr 2005
Posts: 275
Helped: 3
Location: 27.45N, 85.20E KTM, NP
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03 Dec 2006 8:33 Digital Modulation Spectrum in Matlab |
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| Thank you.
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magnetra
Joined: 21 Apr 2005
Posts: 275
Helped: 3
Location: 27.45N, 85.20E KTM, NP
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04 Dec 2006 16:20 Digital Modulation Spectrum in Matlab |
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m_llaa, could u send me a code snippet for what u mentioned in ur earlier post.
M
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