Hello...
I have a QPSK system with a interference by adjacent channel.
In my simulation, the four interfering channels is at 20 dB below the white noise considering my signal band.
Despite of this big difference, when I add the four interfering signals the system suffers a degration about 1.1 dB.
Why is it occurs??
The interference is very small in my system band.
I will send my system in attachment.
Thanks a lot!
I am waiting a answer...
With the best regards
Luciano
[file]adjcent channel interference.svu[/file]
I have a QPSK system with a interference by adjacent channel.
In my simulation, the four interfering channels is at 20 dB below the white noise considering my signal band.
Despite of this big difference, when I add the four interfering signals the system suffers a degration about 1.1 dB.
Why is it occurs??
The interference is very small in my system band.
I will send my system in attachment.
Thanks a lot!
I am waiting a answer...
With the best regards
Luciano
[file]adjcent channel interference.svu[/file]
The main purpose of this simulation is to measure the impact caused by the Adjacent Channel Interference.
If I replace the filter t70 by the filter t92 I have only my WFI signal, therefore, I won`t have the degradation caused due to the adjacent channels.
I think that this is a Software problem in the adder token!
I need to obtain this degradation value urgent!!
With the best regards
Luciano