Anyone can help me on the CC2420 measurement data - RSSI and LQI.
1) It seems like what we read is average CORR, not LQI, based on its data
range [50, 110].
How can we observe the LQI from cc2420? What about a & b used in the
relation formula?
2) The correlation value one can read out from cc2420 is the average
correlation value over the first 8 symbols following SFD received in a
packet.
One symbol is 32-chip sequence (+1 or -1). Given the perfect condition,
the CORR could be as high as 256. How can it be limited in 110, as mentioned
in (1)?
For your reference, I also attach some of TI FAQs on LQI and RSSI.
http://e2e.ti.com/support/low_power_rf/f/160/t/18233.aspx
http://e2e.ti.com/support/low_power_rf/f/160/p/18255/70843.aspx#70843
Pls help me out. Thanks
--
Regards,
Guanbo
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