Hi Debanjan, I somehow managed to get the output bit stream but the 3R generator generator and the BER analyzer after the NRZ encoder you should not use here, If the circuit is correct I would suggest you to use the BER test set for calculating the Q-factor, BER etc. if you want to use the BER analyzer then you have to use it after the Quadrature demodulator along with 3R generator. Thanks. I have attached here with the modified design i will be confirmed after you upload your paper trying to realize.
Regards,
Dhiman