TDMA synchronization
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From: ashu on 29 Apr 2010 03:55 Dear All, I am trying to understand the problem of synchronization in TDMA. If i understand correctly, each TDMA frame begins with a preamble where nodes synchronize each other with the master. I am trying to understand this problem in more detail, the cost of synchronization overhead and the implementation issues with crystals etc. Can someone point me to some resource which outlines this in more depth, I saw some papers and books but they dont go into implementation detail with real micro controllers and radios. thanks ashutosh
From: Tim Wescott on 29 Apr 2010 12:29 ashu wrote: > Dear All, > > I am trying to understand the problem of synchronization in TDMA. If i > understand correctly, each TDMA frame begins with a preamble where > nodes synchronize each other with the master. I am trying to > understand this problem in more detail, the cost of synchronization > overhead and the implementation issues with crystals etc. > > Can someone point me to some resource which outlines this in more > depth, I saw some papers and books but they dont go into > implementation detail with real micro controllers and radios. You may find that information to be closely held. There doesn't seem to be a lot of cell phone type knowledge just out there for the world to see -- I think this is a consequence of the fact that there are only a few players, and they're all big. I've done this sort of synchronization before, but it was for a piece of equipment that could work offline on segments of captured data. The algorithm ran on a PC, which is pretty distant from anything that you might embed into a 'normal' cell phone sort of app. Tell us more about what you want to do, and someone may have some pointers, at least. -- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
From: larwe on 29 Apr 2010 13:01 On Apr 29, 3:55 am, ashu <ashutosh.ghildi...(a)gmail.com> wrote: > I am trying to understand the problem of synchronization in TDMA. If i > understand correctly, each TDMA frame begins with a preamble where Not specifically TDMA, but FHSS radio systems have the same sorts of issues (they are basically two-dimensional TDMA where slots can lie in different frequency ranges as well as time spaces). There are NUMEROUS free FHSS implementations. Try for a start searching for "cc1101 mesh network" and you will find some relevant references.
From: chakahot on 6 May 2010 08:44 Hello ashutosh, All, I agree with there aren't much paper with technical details witch the most interesting. Try to read this one : http://www.deeds.informatik.tu-darmstadt.de/publications/conf/srds01-1.pdf and got to the SoftTDMA project page : http://sourceforge.net/projects/softtdmac/files/softtdma-0.1.tar.gz/download Perhaps by reverse engineering, you can share some information with us on this forum. I will continue with my Google search and will let you know about my find ! Thanks Issiaka Koné --------------------------------------- Posted through http://www.EmbeddedRelated.com
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