Abstract
Conventional schemes use three Mach–Zehnder modulators in the transmitter for the generation of CSRZ-DQPSK signal in passive optical networks. It also simultaneously provides wireline connectivity till ONU and wireless access from ONU, without the need of a separate RF source at the ONU. In this paper, a design of CSRZ-DQPSK transmitter with reduced complexity using two Mach–Zehnder modulators (MZM) and performance analysis of the wireless access from the ONU is analyzed. For wireless transmission of high data rate, a 20 GHz RF carrier signal is generated at the ONU from the received 20 Gbps CSRZ-DQPSK signal. Further, QAM modulation technique is used for 5 Gbps wireless data transmission from the recovered 20 GHz carrier signal. System simulation of the entire fiber link is carried out in Optisystem, and the performance of 2-MZM-based transmitter is analyzed for the wireless transmission from the ONU to the user end, using the eye diagram and received power. Results indicate that 2-MZM-scheme achieves similar performance compared to conventional 3-MZM scheme.
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Rimmya, C., Ganesh Madhan, M., Arshujabin, S. (2018). Performance Analysis of CSRZ-DQPSK Modulator for RoF-PON-Based Wireless Access. In: Gnanagurunathan, G., Sangeetha, R., Kiran, K. (eds) Optical And Microwave Technologies. Lecture Notes in Electrical Engineering, vol 468. Springer, Singapore. https://doi.org/10.1007/978-981-10-7293-2_5
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DOI: https://doi.org/10.1007/978-981-10-7293-2_5
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