Research on 64-QAM subcarrier modulation for optical wireless communication

Ke Xizheng; Xie Mengqi; Shi Biyao

doi:10.3788/IRLA201847.S122003

High-order Quadrature Amplitude Modulation (QAM) in a limited bandwidth can transmit more information than either BPSK or QPSK system. Therefore, the technology is widely used in cable communication systems. While optical scintillation affected the high-order QAM system easily. The multi-mode blind signal equalization is used to reduce the influence of scintillation caused by atmospheric turbulence. In simulation, the turbulence channel was modeled by Gamma-Gamma distribution. The constellation of receiving signal shows the different points dispersions under different channel noise situations. Results show that the transmitted signal was primarily affected by multiplicative noise. A 64-QAM experimental system is built to demonstrate the feasibility of the system under real situation.

Research on 64-QAM subcarrier modulation for optical wireless communication

1. School of Automation and Information,Xi'an University of Technology,Xi'an 710048,China

Received Date: 2018-03-05

Rev Recd Date: 2018-05-03

Publish Date: 2018-06-25

Key words:

Abstract: High-order Quadrature Amplitude Modulation (QAM) in a limited bandwidth can transmit more information than either BPSK or QPSK system. Therefore, the technology is widely used in cable communication systems. While optical scintillation affected the high-order QAM system easily. The multi-mode blind signal equalization is used to reduce the influence of scintillation caused by atmospheric turbulence. In simulation, the turbulence channel was modeled by Gamma-Gamma distribution. The constellation of receiving signal shows the different points dispersions under different channel noise situations. Results show that the transmitted signal was primarily affected by multiplicative noise. A 64-QAM experimental system is built to demonstrate the feasibility of the system under real situation.

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Research on 64-QAM subcarrier modulation for optical wireless communication

doi: 10.3788/IRLA201847.S122003

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