ICM problem

[eng.akhalifa]

dears,
what is the solutions for ICM problem in 2G as our network suffers from high ICM attack?

[eng.akhalifa]

no one have any idea about the solution ?

[VitalyK]

no one have any idea about the solution ?
Did you check your frequency plan?

[VitalyK]

Also do you have any CDMA operators in the area? They can create external interference for P-GSM and E-GSM bands.

[eng.akhalifa]

Also do you have any CDMA operators in the area? They can create external interference for P-GSM and E-GSM bands.
YES there CDMA network but what is the solutions we can do to enhance uplink level resistance ?

[auto_art]

dears,
what is the solutions for ICM problem in 2G as our network suffers from high ICM attack?

u need to use uplink filters..we are using same..with sharp cut off

[VitalyK]

YES there CDMA network but what is the solutions we can do to enhance uplink level resistance ?
the best but the most expensive solution are the filters - input on your BTS and output on CDMA operators' BTS.
Cheaper but less effective way - planning methods i.e. antennas separation (especially by vertical axis), avoid to install GSM and CDMA antennas face-to-face.
Also I don't know your local rules but usually you can ask your regulation authority to push CDMA operators to decrease interference they create for you.

[VitalyK]

Also, check with spectrum analyzer your duplexers' bandpass , if it is wider than standard in GSM thats mean the problem on your side and you will have to ask your vendor to change the duplexers.

[eng.akhalifa]

u need to use uplink filters..we are using same..with sharp cut off
what do you mean by uplink filters ? do you mean filters in MR processing ?

[VitalyK]

what do you mean by uplink filters ? do you mean filters in MR processing ?
Here is an example of such filters http://www.kathrein.de/de/mcs/produkte/download/9364042.pdf