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crenyen
Joined: 16 Sep 2004
Posts: 69
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 26 Aug 2008 15:05 Co-channel and adjacent channel rejection problem |
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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?
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RFCMOS
Joined: 05 May 2005
Posts: 153
Helped: 20
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| 26 Aug 2008 19:18 Re: Co-channel and adjacent channel rejection problem |
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Hello,
Is your reference sensitivity ok?
What about the BER performances for high input power levels?
RFCMOS.
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crenyen
Joined: 16 Sep 2004
Posts: 69
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| 27 Aug 2008 2:22 Co-channel and adjacent channel rejection problem |
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Sensitivity w/o interference is OK.
BER performances for high input power levels is OK.
Thanks
Cren Yen
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RFCMOS
Joined: 05 May 2005
Posts: 153
Helped: 20
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| 27 Aug 2008 21:22 Re: Co-channel and adjacent channel rejection problem |
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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...?
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