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A communication system and method based on pulse overlapping super-Nyquist

A time-domain pulse and channel technology, which is applied in the field of high-spectrum efficiency and large-capacity optical transmission, can solve the problem of low spectrum utilization and achieve the effects of increasing transmission rate, improving utilization, increasing spectrum utilization and information transmission rate

Active Publication Date: 2021-03-09
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Therefore, in order to solve the problem of low spectrum utilization in the prior art, the present invention proposes a super-Nyquist communication system and method based on time-domain pulse overlapping, which compresses signals in the time domain and frequency domain simultaneously , compared with the general super-Nyquist to further improve the spectrum utilization and increase the transmission rate

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  • A communication system and method based on pulse overlapping super-Nyquist
  • A communication system and method based on pulse overlapping super-Nyquist
  • A communication system and method based on pulse overlapping super-Nyquist

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Embodiment 1

[0030] An embodiment of the present invention provides a super-Nyquist transmitting device based on time-domain pulse overlapping, such as figure 1 As shown, it includes: a signal source 1 and a transmitter 2, wherein the signal source 1 is used to provide electrical signals for each channel respectively. In the embodiment of the present invention, the electrical signal sent by the signal source 1 is composed of two parts, one part is The sounding signal (Sp) is used to provide equalization parameters for signal processing after being subsequently received, and the other part is the service signal (ST) actually used for communication; the transmitter 2 is used to separately transmit the signal on each channel Perform time-domain compression on electrical signals to convert non-orthogonal overlapping optical signals, and perform frequency-domain multiplexing on non-orthogonal overlapping optical signals on each channel to generate and output frequency-domain multiplexing signals...

Embodiment 2

[0037] The embodiment of the present invention provides a super-Nyquist communication system based on time-domain pulse overlapping, which can be applied to large-capacity backbone network communication, access network, inter-data center, short-distance communication within data center, large-capacity Spectrum effect wireless transmission scenario. The communication system includes: a transmitting device and a receiving device, such as image 3 As shown, the transmitting device includes: a signal source 1 and a transmitter 2, wherein the signal source 1 is used to provide electrical signals for multiple channels respectively. In the embodiment of the present invention, the electrical signal sent by the signal source 1 is composed of two parts, One part is a sounding signal (Sp), which is used to provide equalization parameters for signal processing after subsequent reception, and the other part is a service signal (ST) actually used for communication; the transmitter 2 is used...

Embodiment 3

[0062] The embodiment of the present invention provides a super-Nyquist communication system based on time-domain pulse overlapping, which can be applied to large-capacity backbone network communication, access network, inter-data center, short-distance communication within data center, large-capacity Spectrum effect wireless transmission scenario. The communication system includes: a transmitting device and a receiving device, such as image 3 As shown, the transmitting device includes: a signal source 1 and a transmitter 2, wherein the signal source 1 is used to provide electrical signals for multiple channels respectively. In the embodiment of the present invention, the signal source 1 is composed of two parts, one part is a detection signal (Sp), used to provide equalization parameters for signal processing after subsequent reception, and the other part is the service signal (ST) actually used for communication; Transmitter 2, used to perform the electrical signal on each ...

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Abstract

The invention discloses a super-Nyquist communication system and method based on time-domain pulse overlapping, wherein the communication system includes a transmitting device and a receiving device, and the transmitting device includes: a signal source, which provides electrical signals for each channel respectively; The machine compresses and converts the electrical signals on each channel into non-orthogonal overlapping optical signals in time domain, and performs frequency domain multiplexing on the non-orthogonal overlapping optical signals on each channel to generate a frequency domain The multiplexed signal is output, and the frequency domain multiplexed signal is transmitted to the receiving device through the optical fiber link. The communication system and method provided by the present invention are based on the super-Nyquist thought in the time-frequency domain. At the transmitting end, the time slots between adjacent pulses and the channel spacing between channels in the frequency domain are compressed to improve the spectrum utilization and information transfer rate. At the receiving end, digital signal processing is used to compensate the intersymbol interference introduced by pulse overlap, breaking the Nyquist criterion to improve bandwidth utilization and transmission rate.

Description

technical field [0001] The invention relates to the technical field of high spectral efficiency and large capacity optical transmission, in particular to a non-orthogonal overlapping technology and a communication system and method for frequency domain compression. Background technique [0002] In order to meet market needs, optical transmission systems need to improve performance in terms of flexibility, power consumption, and transmission capacity. And the ability to support increased spectral efficiency on top of already deployed fiber is critical. Some techniques have been proposed to improve spectral efficiency, including Nyquist Wavelength Division Multiplexing (Nyquist-WDM), Orthogonal Frequency Division Multiplexing (OFDM). When the first two technologies use optical fiber as the channel, their performance and complexity are the same, and they are both orthogonalized. However, Nyquist WDM technology requires specific spectral envelope waveforms and specific filters...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L25/06H04B10/50
CPCH04B10/506H04L25/03343H04L25/03834H04L25/06
Inventor 高冠军许丞李静雯韩孟祥毛文妍白靖张杰
Owner BEIJING UNIV OF POSTS & TELECOMM