Hello, Related to this post, I was trying to simulate correlation value in avrora for cc2420. Initially, I was thinking about using SNR to obtain BER and use it as corr value. However, it doesn't make sense to me that it ranges between 50 and 110.
Do you have any clue/suggestion/comment of how to model the correlation value of cc2420? Thanks for your time, With regards, ------- Rodolfo On Wed, 2008-03-05 at 13:54 -0800, Philip Levis wrote: > On Mar 5, 2008, at 10:59 AM, Rodolfo de Paz Alberola wrote: > > > > > So, what I understand is that this value from tinyos is the correlated > > value of this 8 symbols instead of the LQI of 802.15.4. Is that right? > > And what this correlated value is exactly? My understanding is that is > > a correlation between the chip that is suposed to be received in the > > receiver and the chip received (signal + noise). Does that make sense > > for you? > > > > You are 100% right. Technically, TinyOS's LQI value is not actually > LQI. But it's such common parlance now that trying to change it is > probably not worthwhile. It is, technically, the soft chip > correlation (not hard chip decision) of the chips of the first 8 > symbols to the chosen symbols. So it's not really a bit error, rather > a measure of how close the observed bits were to their expected > values given the decoded symbol. > > Phil _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
