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Communication method, system, signal multiplexing method and device between time and frequency domain

A signal multiplexing and signal technology, which is applied in frequency division multiplexing selection devices, time division multiplexing selection devices, transmission systems, etc., can solve the problem that the optical fiber communication system cannot further improve the transmission capacity, etc. Deterioration and PAPR reduction effect

Inactive Publication Date: 2018-12-14
WUHAN POST & TELECOMM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem that the existing optical fiber communication system cannot further improve the transmission capacity by adopting the wavelength division multiplexing technology

Method used

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  • Communication method, system, signal multiplexing method and device between time and frequency domain
  • Communication method, system, signal multiplexing method and device between time and frequency domain
  • Communication method, system, signal multiplexing method and device between time and frequency domain

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specific Embodiment 1

[0091] like figure 1 As shown, the optical fiber communication system between the time domain and the frequency domain provided by Embodiment 1 of the present invention includes a sending end 100 and a receiving end 200 , and the two perform information communication through an optical fiber link 300 .

[0092] The transmitting end 100 includes a multiplexing module 110 and a modulating module 120. The multiplexing module 110 converts the input serial binary electrical signal into N parallel electrical signals, and then converts it into a domain between the time domain and the frequency domain. To multiplex the electrical signal, the modulation module 120 modulates the multiplexed electrical signal onto an optical carrier to form a multiplexed optical signal, which is input into the optical fiber link 300 for transmission. N is a positive integer, which can be set according to the needs of the system.

[0093] The receiving end 200 includes a photodetector 210 and a demultipl...

specific Embodiment 2

[0100] Embodiment 2 of the present invention is to refine the structure of the signal multiplexing device, see figure 1 , the signal multiplexing device includes a serial-to-parallel conversion module 111 , a code mapping module 112 , a multiplexing data processing module 113 and a digital-to-analog conversion module 114 .

[0101] The serial-to-parallel conversion module 111 is used to divide the input serial electrical signal sequence into N groups, and convert it into N parallel electrical signals;

[0102]The encoding and mapping module 112 is configured to encode the above-mentioned N channels of parallel electrical signals, and map them into N channels of parallel high-order modulation signals, such as quadrature amplitude modulation and the like.

[0103] The multiplexing data processing module 113 is used to modulate the above-mentioned N channels of parallel high-order modulation signals onto subcarriers corresponding to the domain between the time domain and the freq...

specific Embodiment 3

[0106] Embodiment 3 of the present invention is the first implementation of the multiplexing data processing module, which is implemented in a traditional subcarrier multiplexing manner, such as Figure 4 As shown, its composition structure includes a time domain-frequency domain subcarrier generation module 1131 , N multipliers 1132 and an adder 1133 .

[0107] The time domain-frequency domain subcarrier generation module 1131 is used to generate N subcarriers on the domain between the time domain-frequency domain;

[0108] N multipliers 1132 multiply N channels of parallel high-order modulation signals with the above-mentioned subcarriers in the domain between the time domain and the frequency domain, thereby modulating to obtain N channels of time domain-frequency domain modulation signals;

[0109] The adder 1133 adds the above-mentioned N channels of time domain-frequency domain modulation signals, and multiplexes them into multiplexed electrical signals. The multiplexed...

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Abstract

The invention discloses a communication method, a system, a signal multiplexing method and a device between time and frequency domains. A method for optical fiber communication between frequency domains comprises the following steps: at a transmitting end, an inputted serial binary electrical signal is converted into an N-channel parallel electrical signal, and the N-channel parallel electrical signal is converted into a multiplex electrical signal between time domains; the multiplexed electrical signal in frequency domain is modulated on optical carrier to form multiplexed optical signal, which is input to optical fiber link for transmission; at a receiving end, the multiplexed optical signal received from the optical fiber link is converted into a multiplexed electrical signal, and the multiplexed electrical signal is demultiplexed to restore the multiplexed electrical signal to a serial binary electrical signal. The invention extends the traditional frequency domain multiplexing technology to time. Multiplexing and demultiplexing are realized in the frequency domain between the time and frequency, which suppresses the signal degradation caused by the nonlinear and dispersion effects of optical transmission in optical fiber, improves the frequency band efficiency in OFDM system and reduces the PAPR.

Description

technical field [0001] The present invention relates to the technical field of optical fiber communication, in particular to an optical fiber communication method and system, and a method and device for multiplexing signals between the time domain and the frequency domain. Background technique [0002] With the development and progress of human society, communication technology has developed rapidly. Among them, optical fiber communication has many advantages such as stable signal, low loss, long transmission distance and high capacity, and has become one of the most important communication technologies in all countries in the world. [0003] Today, the research hotspots of optical fiber communication technology are: ultra-high-speed transmission system, ultra-large-capacity WDM system and all-optical networking. Among them, since the development of optical fiber communication, in order to improve the communication capacity, many advanced technologies, such as coherent opti...

Claims

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Application Information

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IPC IPC(8): H04B10/25H04B10/2513H04B10/2575H04Q11/02H04Q11/04
CPCH04B10/2513H04B10/2575H04Q11/02H04Q11/04H04B10/25891
Inventor 李蔚余少华郑强
Owner WUHAN POST & TELECOMM RES INST CO LTD
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