Advanced modulation with WDM fso
hi
when i designed a qpsk system with wdm fso and increased the number of channels from 8 to 16 and keep the center frequency 193.44khz at fixed distance , attenuation , and all other parameters so when i compare the result of Log BER for 193.414 at 8 channels wdm and for 16 channel WDM i found that the value get better at 16 channel for example the value at 8 channel is -3.152 and for 16 channel is -3.192 . i think that is not true? can any one help me to clarify this point .
thanks
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