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???
04/14/10 06:19
Modified:
  04/14/10 06:24

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#175031 - I was thinjing much the same thing
Responding to: ???'s previous message
In principle its not difficult to do it the data rate is low enough, anything much over V.22 would be trickier and anything aproaching more than a few kilobits/second needs a faster processor or dedicated hardware.
I was thinking you would be able to get a greater baudrate at the cost of higher bit error rates using QAM* or QPSK** rather than FSK for not much more effort in terms of coding.


*Quadrature Amplitude Modulation
**Quradrature Phase Shift Keying

List of 17 messages in thread
TopicAuthorDate
FSK Modul            01/01/70 00:00      
   Incomplete question            01/01/70 00:00      
   Yes            01/01/70 00:00      
      Just Simple FSK            01/01/70 00:00      
         V.22?            01/01/70 00:00      
         Scenix and Cypress            01/01/70 00:00      
      Yes, here's an 80c51 that does it            01/01/70 00:00      
         ftp://ftp.embedded.com/pub/2002/09banks            01/01/70 00:00      
            it's been a while ...            01/01/70 00:00      
   with 80C51            01/01/70 00:00      
      Built FSK Modul            01/01/70 00:00      
         there's such info            01/01/70 00:00      
            I cannot find it            01/01/70 00:00      
               past info            01/01/70 00:00      
   Lots of unanswered questions, but probably yes            01/01/70 00:00      
      I was thinjing much the same thing            01/01/70 00:00      
         There are problems with some modulation schemes            01/01/70 00:00      

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