ELS61_R2 Jamming | Telit Cinterion IoT Developer Community
April 16, 2020 - 11:01am, 750 views
Good day all.
I am busy looking at the jamming implementation on the ELS61. I found the document: "els61_an45_jamming_detection_rls_v02" and worked through it. But now there is some discrepancies.
For 2G, going from +CIEV:"lsta",0,*** to +CIEV:"lsta",1,***, the <IstaMin>, <IstaMax> and <IstaMean> is positive values. In the document, it is negative values, but from the module it is posative? From what it looks like. It *** out at 63. So my assumption is this value corresponds to the CSQ value of 2G
Then for 3G, going from +CIEV:"lsta",10,*** to +CIEV:"lsta",11,***, the <IstaMin>, <IstaMax> and <IstaMean> is also positive, but with higher ***. Not sure what the *** would be.
For 4G these are negative, which my assumption would be normal RSSI in dBm?
So, my question is, what reference is used for 2G and 3G? How can I convert the 2G and 3G values to similar RSSI dBm values as 4G. I need some way to see if the floor noise level is higher than a certain value. But for that, I need the values to have a similar reference/meaning.
Can anybody help me with this?
These values are described as received signal strength in dBm regardless of the technology. So I think that you can ignore the sign - maybe it is really an incoherence that the sign differs. But as each technology is different and works on different frequencies the values measured in the field for different radio acceess technologies may be different. And as for the jamming detection the document describes separate criteria for each RAT.