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Device and system for simultaneously generating wired and wireless signals by adopting dual-polarization MZM modulator

A wireless signal and modulator technology, applied in transmission systems, optical fiber radio, electromagnetic wave transmission systems, etc., can solve the problems of optical fiber transmission distance limitation, affecting system reliability, mutual interference, etc., to avoid mutual interference and avoid fiber dispersion. separation effect, high reliability effect

Active Publication Date: 2020-08-18
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still the problem of mutual interference between wired and wireless signals, and it is affected by the dispersion and walk-off effect of optical fiber caused by double-sided bands, which limits the transmission distance of optical fiber, causes a certain power loss, and affects the reliability of the system.

Method used

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  • Device and system for simultaneously generating wired and wireless signals by adopting dual-polarization MZM modulator
  • Device and system for simultaneously generating wired and wireless signals by adopting dual-polarization MZM modulator
  • Device and system for simultaneously generating wired and wireless signals by adopting dual-polarization MZM modulator

Examples

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Embodiment 1

[0036] refer to figure 1 As shown, the present embodiment provides a device that adopts a dual-polarization MZM modulator to simultaneously generate wired and wireless signals, and the device is used to generate a mixture comprising QPSK signal I road data 3, QPSK signal Q road data 4 and OOK data signal 9 The optical signal includes a millimeter wave carrier generation module, an I / Q mixer 7, a dual-polarization MZM modulator 12, an optical amplifier 13 and an optical filter 14. The millimeter wave carrier generation module is used to generate the frequency f R The millimeter wave carrier includes a connected sine generator 5 and a frequency multiplier 6 . The I / Q mixer 7 is used to load the I channel data of the QPSK signal and the Q channel data of the QPSK signal onto the millimeter wave carrier to generate a QPSK millimeter wave signal. The dual-polarization MZM modulator 12 is driven by the QPSK millimeter wave signal and the OOK baseband electrical signal, and adopts ...

Embodiment 2

[0041] Such as figure 1 As shown, this embodiment provides a communication system, including a connected central station 1 and a base station 2, the central station 1 is a device that uses a dual-polarization MZM modulator to simultaneously generate wired and wireless signals as described in Embodiment 1 . The base station 2 includes a photodiode 16, a millimeter-wave transmitting antenna 18 and a baseband receiver 17. The photodiode 16 is used to convert the mixed optical signal into a baseband signal and a millimeter-wave electrical signal; the millimeter-wave transmitting antenna 18 is used to transmit millimeter-wave electrical signals. Signal; the baseband receiver 17 is used to receive and process the baseband signal.

[0042] In this embodiment, the received optical signal is directly detected by the photodiode 16 and converted into a mixed signal of electrical baseband and electrical millimeter wave. For the electrical baseband signal, the baseband receiver 17 can be...

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Abstract

The invention relates to a device and a system for simultaneously generating wired and wireless signals by adopting a dual-polarization MZM modulator, the device is used for generating mixed optical signals containing QPSK (Quadrature Phase Shift Keying) signal I-path data, QPSK signal Q-path data and OOK (On-Off Keying) data signals, and comprises a millimeter wave carrier generation module; an I / Q mixer which is used for generating a QPSK millimeter wave signal; a dual-polarization MZM modulator which generates a wireless millimeter wave signal in a QPSK modulation format and a wired baseband signal in an OOK modulation format at the same time by adopting an optical subcarrier multiplexing technology to form a double-sideband optical signal; an optical amplifier which is used for amplifying the double-sideband optical signal; and an optical filter which is used for converting the amplified double-sideband optical signal into a finally output mixed optical signal. Compared with the prior art, the device has the advantages of high reliability, high stability, low cost, simple structure, easiness in implementation and the like.

Description

technical field [0001] The invention belongs to the technical field of optically generated millimeter waves, and relates to a communication system based on optical fiber-wireless (Radio-over-Fiber, abbreviated as RoF), in particular to a device for simultaneously generating wired and wireless signals using a dual-polarization MZM modulator and system. Background technique [0002] In recent years, with the rapid development of Internet technology, various new services and new technologies have triggered a sharp increase in data traffic, and the demand for communication network bandwidth and capacity scale has continued to increase. The communication frequency band of mobile communication and space communication is moving to the higher frequency millimeter wave frequency band, which can support greater transmission bandwidth and rate, and provide greater system capacity. However, it has been difficult to generate high-quality mmWave signals based on electric domain technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/54H04B10/516H04B10/2575
CPCH04B10/503H04B10/541H04B10/5165H04B10/5161H04B10/25752Y02D30/70
Inventor 余建军孔淼
Owner FUDAN UNIV
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