Hello Joe, What is sure is that there is no other differences that the ones I gave in the "RX/TX modes selection and their descriptions" chapter, so modifications on: * Block size (symbols) * Scrambling pseudo-random sequence * Scrambling shift (in number of bits of sequence right rotation) * Characters set
Try first to change from Olivia to Contestia. It is the simplest, as RTTYM adds a switch management, contrary to RTTYM. Then try in reception generating Contestia, without noise. You must decode it. Then adjust the different parameters of your code to decode low S/N Contestia signals. 73 Patrick ----- Original Message ----- From: Joe Veldhuis To: [email protected] Sent: Wednesday, September 27, 2006 6:38 PM Subject: Re: [digitalradio] Re: Implementing Contestia/RTTYM, could use some advice Patrick only gave an outline of the differences between Olivia and the derivative modes. What I am looking for is some pointers on the actual task of modifying the templates to implement those differences. I tried implementing RTTYM by changing the "BitsPerCharacter" and scrambling code/shift parameters in Pawel Jalocha's reference code (and then passing the output through a Baudot>ASCII routine), but that was apparantly not enough, since I don't get any output from the demodulator. -Joe, KD8ATU jhaynesatalumni wrote: > I haven't looked yet, but you might look in the MultiPSK documentation, > since Patrick recently implemented those modes in his program and may > have written them up. [Non-text portions of this message have been removed] Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
