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buts101
Joined: 29 Apr 2005
Posts: 194
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 15 Mar 2006 11:55 PWM,PAM,PPM,PCM |
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which of the modulation (pwm,pam,ppm,pcm) is least affected by the noise??
thank you
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kchandra85
Joined: 28 Feb 2006
Posts: 11
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| 27 Mar 2006 0:38 Re: PWM,PAM,PPM,PCM |
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| i guess it doesnt matter much as all are digital transmission techniques...........
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flatulent
Joined: 19 Jul 2002
Posts: 4857
Helped: 286
Location: Middle Earth
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| 27 Mar 2006 3:30 Re: PWM,PAM,PPM,PCM |
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| The first three carry their information in the edge locations or the top of the pulse which are variable quantities and are really a form of analog modulation. PCM depends only the presence or absence of a pulse which has more noise immunity.
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chandu9890
Joined: 27 Mar 2006
Posts: 4
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| 28 Mar 2006 20:49 Re: PWM,PAM,PPM,PCM |
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| actually PCM is the only digital communication system. hence in this way it has more noise immunity than other three. the PWM,PAM,PPM is the analog modulation technique not the digital communication. the PWM,PAM,PPM SURELY HAS MORE NOISE IMMUNITY THAN AM. WHICH IS ALSO ANALOG MODULATION SYSTEM
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