hello every one….
my design is 8 channel WDM-Dp-CO-OFDM-16QAM system .each channel with 100Gbps and symbol rate 12.5 Gsymbol/sec.
I use new OFDM block (OS13) that compensate dispersion digitally. mux/dmux parameters ( channel spacing 50Ghz, Bandwidth 25Ghz ,and first frequency is 192.95Thz). my problem is only center channel (channel 4) have acceptable BER , but the other have worst BER, also i have high OSNR after DMUX( i think its not real).
so please have any support or guidance.
i will attach my design…
BEST REGARD
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