Performance analysis of full-duplex 4×10Gbps TWDMPON using QAM-OFDM modulation

In this paper, a bidirectional 40/40Gbps time and wavelength division multiplexing-passive optical network (TWDM-PON) system employing 4-level quadrature amplitude modulation (4-QAM) orthogonal frequency division multiplexing (OFDM) modulation is proposed and analysed to ulfil the high bandwidth demand of next-generation access networks. The system has been analysed for variable distance, data rate and input power. The results show that the bidirectional 40/40 Gbps traffic can be transmitted successfully up to 200 km with an optimum input power of 16 dBm at 3.8×10-3 bit error rate (BER) using digital signal processing (DSP) unit. Also, the proposed system shows its superiority as c…