On Jul 13, 2006, at 3:44 AM, Liu Haibin wrote:
Hi,
The clearThreshold in UscGainInterferenceModelC.nc is set to -95.
It says that the value comes from cc2420 data sheet. But I searched
the data sheet but didn't find it. So how does this value come out?
Thanks.
The clearThreshold in the CC2420 data sheet is -72 dBm. The issue is
that the propagation model is (currently) based off of mica2 data,
which has lower RSSI values. This means that there's almost never any
signal that's > -72 dBm. So I adjusted it to be -95, which is
basically the equivalent value in terms of the RSSI ranges.
Once there's enough data collected on the CC2420, the plan is to use
a model derived from that.
Phil
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