Co-channel and adjacent channel rejection problem

[crenyen]

co-channel rejection

I have co-channel and adjacent channel rejection problem in my WiMAX products with zero IF, build-in LNA in tranceiver and digital IQ.
The receiving BER will be un-acceptable when co-channel and adjacent channel interference become higher.
Can anyone have any idea about the problem?

 

[RFCMOS]

adjacent channel rejection, ber

Hello,

Is your reference sensitivity ok?
What about the BER performances for high input power levels?

RFCMOS.

 

[crenyen]

adjacent channel rejection

Sensitivity w/o interference is OK.
BER performances for high input power levels is OK.

Thanks
Cren Yen

 

[RFCMOS]

co channel rejection

Hello,

Usually, co-channel performances are mainly determined by the equalizer performances. Just to be sure about you set-up. Do you perform the measurements at system level? By system, I mean are you using a baseband...?