On Fri, 2008-03-28 at 14:14 -0700, Philip Levis wrote: > On Mar 26, 2008, at 7:27 AM, Rodolfo de Paz Alberola wrote: > > > Hi all, > > > > I am emulating cc2420 radio chip in avrora and testing it with > > tinyos-2.x. Right now, I am working with LQI and RSSI values. > > > > However, I don't have idea of how to simulate the correlation value. > > In > > the data sheet says that this value can be seen like a "chip error > > rate". So, I was thinking about using the S/N and then the BER to > > calculate that, but, I don't understand why it ranges between 50 and > > 110. > > > > Do you have any idea of how to model that? > > > > Any suggestion will be really appreciated. > > There are some posts on this topic, which include some comments from > TI (was ChipCon then). Contacting them directly might be the best way > to figure this out. > > Phil
Thanks for your reply, I have found a post where there is a explanation from Oyvind Janbu. However, I have still some questions: My understanding is that the correlation value in the rxfifo is the sum of the 8 first correlation values for the symbols following SFD. But how are these values calculated? Each of this correlation values should range between 0-16 to have as a result a 7 bit uint value (16*8 = 128 values), so I still don't understand that. In the explanation is also said that the values don't go to 127 due to bandwidth limitations. I tried to contact TI by the webpage and I didn't have any reply. Could it be possible to get any TI-cc2420 contact mail? Thanks for your help, ------- Rodolfo _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
