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Self-feedback signal modulation method based on 5G-RoF

A signal modulation and self-feedback technology, applied to electromagnetic transmitters and other directions, can solve problems such as signal modulation difficulties, and achieve the effect of improving communication quality and communication efficiency

Inactive Publication Date: 2019-01-25
WENZHOU POLYTECHNIC
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a self-feedback signal modulation method based on 5G-RoF, which uses passive vibration devices to complete the optical carrier modulation of electrical signals, and solves the difficult problem of signal modulation in 5G network systems

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  • Self-feedback signal modulation method based on 5G-RoF

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] see figure 1 As shown, the present invention is a self-feedback signal modulation method based on 5G-RoF, comprising the following steps:

[0035] S00: Set the feedback coefficient C;

[0036] Feedback coefficient a is the feedback coefficient of the light field amplitude, a en is the line width factor, n 1 is the scattering index of the propagation medium, s 0 is the distance between the passive vibration device and the front face of the laser resonat...

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Abstract

The invention discloses a self-feedback signal modulation method based on 5G- RoF which relates to the technical field of self-feedback signal modulation. The invention comprises the following steps of: setting a feedback coefficient C; driving the passive vibration device to vibrate; calculating the return light field reflected by the end face of the passive vibrating device and returning to theresonant cavity; the loop gain of the electro-optic modulation system is obtained according to the light field returned to the resonant cavity. According to the loop gain of the system, the frequencychange in the cavity is calculated after the laser is modulated. The dimmed signal is filtered by fiber Bragg grating. According to the light field returned to the resonant cavity, the loop gain of the electro-optic modulation system is obtained. According to the loop gain of the electro-optic modulation system, the frequency change in the cavity after the laser is modulated is calculated, and then the dimmed signal is filtered through the Bragg fiber grating, which realizes the adjustment of the photoelectric signal in the 5G network, and improves the communication quality and the communication efficiency.

Description

technical field [0001] The invention belongs to the technical field of self-feedback signal modulation, in particular to a 5G-RoF-based self-feedback signal modulation method. Background technique [0002] By using the photoelectric effect, a certain characteristic of the optical carrier can be controlled by an external electric field, and the loading of the electrical signal to the optical signal can be realized. Commonly used optical modulators based on the electro-optic effect include Polarization Modulator (Polarization Modulator, PolM), Phase Modulator (Phase Modulator, PM) and Mach-Zehnder emphasized modulation that uses the Mach-Zehnder interferometer structure to realize the conversion from phase modulation to intensity modulation. (Mach-Zehnder Modulator, MZM). A semiconductor electro-absorption modulator (Electro-Absorption Modulator, EAM) is also a kind of light modulator that has attracted much attention. However, its own chirp effect, which changes dynamically...

Claims

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Application Information

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IPC IPC(8): H04B10/50
Inventor 黄河
Owner WENZHOU POLYTECHNIC