Radio-over-fiber communication method based on hexagonal constellation forming iteration

Abstract

The invention discloses a radio-over-fiber communication method based on hexagonal constellation forming iteration, and the method comprises the following steps: at an input end, converting an original signal into multiple binary data streams through serial-parallel conversion, and identifying and adding labels to the binary data streams; performing constellation compression on the processed signal through a probability matcher, and compressing a 32QAM constellation diagram into a 25QAM constellation diagram; carrying out successive iteration on the signal after constellation compression to obtain an optimal constellation compression ratio, and then carrying out constellation mapping to obtain a 19QAM constellation diagram; modulating the signal subjected to constellation mapping into twopaths of optical signals with different frequency bands through a modulator, enabling the signals to sequentially enter an optical fiber amplifier to adjust the signal power and then transmitting thesignals to an optical attenuator through a single-mode optical fiber to be processed, enabling a photoelectric converter to convert the optical signals into electric signals, enabling an electric power amplifier to adjust the power of the electric signals, and finally performing wireless transmission is conducted; at a receiving end, sequentially carrying out constellation demapping, analog-to-digital conversion and parallel-to-serial conversion on the received signal to obtain original data.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a wireless communication method over light based on hexagonal constellation forming iterations. Background technique [0002] The advent of the 5G era also promotes the development of future wireless communications towards new services such as multimedia mobile communications, such as high-definition video services, distance learning office, and television. However, in the process of wireless channel transmission, there are problems such as large power loss and lack of spectrum, and it is difficult to meet the requirements of various new multimedia mobile services. [0003] However, the nonlinear effects of optical fibers include: scattering effects (Stimulated Brillouin Scattering SBS and Stimulated Raman Scattering SRS, etc.), self-phase modulation SPM closely related to refractive index, cross-phase modulation XPM, four-wave mixing effect FWM, etc., especi...

AI Technical Summary

Problems solved by technology

However, in the process of wireless channel transmission, there are problems such as large power loss and lack of spectrum, and it is difficult to meet the requirements of various new multimedia mobile services.

[0003] However, the nonlinear effects of optical fibers include: scattering effects (Stimulated Brillouin Scattering SBS and Stimulated Raman Scattering SRS, etc.), self-phase modulation SPM closely related to refractive index, cross-phase modulation XPM, four-wave mixing effect FWM, etc., especially four-wave mixing and cross-phase modulation seriously affect the quality of signal transmission

In order to reduce the impact of fiber nonlinear effects on communication systems, one way is to upgrade the fiber and transceiver, but this method is very difficult to achieve

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