I am designing Duobinary modulation over SMF fiber and i need some clarifications
1) can we replace precoder and adder circuit with Bessel electrical low pass filter.If possible provide circuit diagram and filter specification i need.
2) In modified duobinary can i replace precoder and sub-tractor circuit with high pass filter? Please provide details.
3) Before detector circuit(after transmitted with fiber) can i user Bandpass Bessel filter. Please provide its importance and parameter specifications.
4)Duobinary modulation using symmetrical structure.
Advance in Thanks
Siva Rama Krishna
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