Receiving Pulse-Code Modulation on AM radio?

Question

Hi:Hypothetical situation: a PCM audio signal [24-bit and monoaural] istransmitted through an analog 150 Khz AM carrier, an AM receiver on theother end [tuned to 150 Khz] picks up the signal, and the reciever isattached to a device that can recieve, process, and decode the PCMaudio back to analog and then send it to a loudspeaker. However -- inthis theoretical situation -- the environment is filled with magneticinterference that affects all AM stations.My question: Will the received PCM audio signal remain noticeably"clean" to the listener or will he/she notice the magnetic disruptionsaffecting the audio?I ask because I think -- but definitely don't know -- that because thereceived signal is digital, it is less likely that the static wouldcause noticeable auditory disruptions when compared to analog. Do Iguess correct?Thanks,Radium

John Larkin · Accepted Answer

Won't work. The data bit rate (for 44 KHz sampling) is 1.05 MHz, toomuch to put on a 150 KHz AM carrier, at least without insanely exoticmodulation tricks.John

Radium · Answer

Just what are these "insanely exotic modulation tricks"?

Radium · Answer

What is we use a 3 MHz AM carrier, instead?

Tim Williams · Answer

Think data error.Tim-- Deep Fryer: a very philosophical monk.Website:

Radium · Answer

Could heterodynes [often heard as frightening high-pitched tones onanalog AM radio] cause data errors [or any other disruptions] in adigital device receiving PCM signals on an AM station?

Eeyore · Answer

They're more insane even than you !Graham

John Larkin · Answer

You'd have to research communications theory. Google "informationtheory" and "Shannon capacity" to start.John

Receiving Pulse-Code Modulation on AM radio?

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