Performance Analysis of CSRZ-DQPSK Modulator for RoF-PON-Based Wireless Access

Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 468)


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.


Mach–zehnder Modulator (MZM) Carrier-suppressed return-to-zero (CSRZ) Differential quadrature phase shift keying (DQPSK) Quadrature amplitude modulation (QAM) Radio over Fiber (RoF) 


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Department of Electronics Engineering, MIT CampusAnna UniversityChennaiIndia

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