DCM/Diff.D: A threshold-less and dynamic decision making receiver design for improved transmission performance

The simulation results and analysis of a novel transmission technique namely double carrier modulation/differential detection are presented, we show how the differential detection technique improves the system performance significantly, we also demonstrate that this technique overcomes the problems associated with voltage threshold in conventional systems, and how it suggest the possibility to double up the conventional long distance without amplifiers with a BER of as good as 10^-13 at 2.5 Gbps over 150 Km distance with 0 dBm transmit power. The new scheme also shows a much slower degradation with distance than that of conventional IM/DD system.