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ELS61_R2 Jamming | Thales IoT Developer Community

April 16, 2020 - 11:01am, 717 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

+CIEV:"lsta",0,0,50

+CIEV:"lsta",1,2,63,63,63,0

+CIEV:"lsta",1,40,63,63,63,0

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.

+CIEV:"lsta",10,10,-58,-33,-25

+CIEV:"lsta",11,64,64,2969,3032,72,76,74,13

For 4G these are negative, which my assumption would be normal RSSI in dBm?

+CIEV:"lsta",21,60,60,6150,6450,-89,-82,-87,1

+CIEV:"lsta",21,120,120,0,600,-30,-23,-27,11

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?