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Transmitting terminal, a fiber-optic wireless multi-carrier communication system and a signal processing method thereof

A light wave signal and sending terminal technology, which is applied in the field of information and communication, can solve the problems of nonlinear optical effect, low spectral utilization rate, unfavorable information demodulation, etc., to achieve spectral utilization rate, communication rate and reduce bit error rate Effect

Pending Publication Date: 2019-05-28
GUANGDONG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the technical solution disclosed in the above-mentioned invention patent application can realize the integration of optical fiber technology and wireless technology, there are still the following problems: low communication rate and low spectral utilization rate; nonlinear optical effects in optical fiber transmission are not conducive to the solution of information in ONU adjust

Method used

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  • Transmitting terminal, a fiber-optic wireless multi-carrier communication system and a signal processing method thereof
  • Transmitting terminal, a fiber-optic wireless multi-carrier communication system and a signal processing method thereof
  • Transmitting terminal, a fiber-optic wireless multi-carrier communication system and a signal processing method thereof

Examples

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Effect test

Embodiment 1

[0061] Such as figure 1 As shown, a fiber optic wireless multi-carrier communication system includes a transmitting terminal TTU, a radio remote unit RRU, a mobile terminal unit MT, a downlink fiber Downlink and an uplink fiber Uplink. The sending terminal TTU includes a downlink and an uplink; the downlink communicates with the remote radio unit RRU through the downlink optical fiber Downlink; the uplink communicates with the remote radio unit RRU through the uplink optical fiber Uplink. The remote radio unit RRU communicates with the mobile terminal unit MT through a wireless link.

[0062] Such as figure 1 As shown, in this embodiment, the transmitting terminal TTU includes: a continuous wave laser CWL, the output end of which is connected to the input end of the polarization controller PC; the polarization controller PC, whose output end is connected to the input end of the Mach-Zehnder modulator MZM; The signal generator SSG, the output end is connected to the modulatio...

Embodiment 2

[0166] The difference between this embodiment and Embodiment 1 is that the center frequencies of the four optical signals b1, b2, b3, and b4 output by the first wavelength division multiplexer WDM1 are not 193.18THz, 193.15THz, 193.12THz, and 193.09THz, but 193.00THz、193.01THz、193.02THz、193.03THz、193.04THz、193.05THz、193.06THz、193.07THz、193.08THz、193.09THz、193.10THz、193.11THz、193.12THz、193.13THz、193.14THz、193.15THz、193.16THz , 193.17THz, 193.18THz, 193.19THz, 193.20THz in the four optical signals, such as 193.04THz, 193.08THz, 193.12THz, 193.16THz, the center frequency of the eight-channel RF carrier output after the photon detector PD heterodyne beat frequency 5GHz, 10GHz, 45GHz, 50GHz, 85GHz, 90GHz, 125GHz, 130GHz respectively; if the center frequencies of the four optical signals b1, b2, b3, b4 output by the first wavelength division multiplexer WDM1 are 193.04THz, 193.06THz respectively , 193.08THz, 193.10THz, then the center frequencies of the eight RF carriers output by t...

Embodiment 3

[0168] The difference between this embodiment and Embodiment 1 is that the modulation frequencies of the first quadrature modulator QM1 and the second quadrature modulator QM2 are not 5GHz and 10GHz; for example, the modulation frequency of the first quadrature modulator QM1 is 5GHZ, and the modulation frequency of the second quadrature The modulation frequency of the two quadrature modulators QM2 is 15GHz, then the center frequencies of the eight RF carriers output by the photon detector PD after heterodyne beat frequency are 5GHz, 15GHz, 45GHz, 50GHz, 85GHz, 90GHz, 125GHz, 130GHz respectively.

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Abstract

The invention discloses a transmitting terminal, a fiber-optic wireless multi-carrier communication system and a signal processing method thereof. The transmitting terminal comprises: a continuous wave laser, the output end is connected to the input end of the polarization controller; the polarization controller is connected to the Mach-Zehnder output. The input of the modulator; the sinusoidal signal generator, the output is connected to the modulation end of the Mach-Zehnder modulator; the Mach-Zehnder modulator outputs the optical signal a at the output and is connected to the input of thefirst wavelength division multiplexer a first wavelength division multiplexer, an output terminal outputs a light wave signal and is connected to an input end of the dual modulation circuit; and a dual modulation circuit is configured to load two modulation frequencies on the light wave signal output by the first wavelength division multiplexer Modulation signal; the invention applies two modulation frequency modulation signals on the optical wave signal outputted by the first wavelength division multiplexer through the dual modulation circuit, thereby realizing the superposition and transmission of two channels of data by one optical signal, thereby improving the spectrum utilization rate and communication speed.

Description

technical field [0001] The present invention relates to the field of information and communication technologies, in particular to a sending terminal, an optical fiber wireless multi-carrier communication system and a signal processing method thereof. Background technique [0002] With the rapid development of information and communication technology (ICT), ultra-large broadband optical fiber communication and high-speed mobile access have attracted more and more attention from the industry. The integration of optical fiber technology and wireless technology is the development direction of future communication. However, it is difficult to achieve true deep integration based on the current technology platform. [0003] The invention patent application with the publication number CN108521299A discloses a multi-scenario optical fiber wireless converged communication system, including an OLT block, an optical fiber, a second wave demultiplexing unit, and several ONU blocks. The ...

Claims

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Application Information

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IPC IPC(8): H04L27/36H04B10/50H04B10/2575H04J14/02
CPCY02D30/70
Inventor 李广冯健文何飞勇
Owner GUANGDONG INST OF SCI & TECH
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