aaron_do wrote on Apr 7th, 2008, 5:31am:Hi all,
what kind of accuracy do we normally see in the RSSI? My thinking is that it is difficult to properly define the receivers gain since the LNA and mixer gain an easily vary by a few dB. You can make a very accurate channel fitler and VGA i guess...
thanks,
Aaron
It depends on required input dynamic range and calibration's accuracy. For example, use compensation table determined by calibration procedure.
If you adopt complicated calibration over temperature, supply voltage and input frequency,
accuracy of less than +/-1.5dB is very possible.
Here you need temperature sensor, ADC and EEPROM, etc.