Optical transmission method and device based on power spectrum shaping

A technology of power spectrum and optical transmission, applied in the field of optical communication, can solve the problem of high signal power, achieve the effect of reducing dispersion, reducing the amplitude of output optical signal, and reducing the complexity of signal processing

Active Publication Date: 2020-12-08
湖南工商大学
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  • Claims
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Problems solved by technology

However, the Mazeng modulator in this research is biased at the quadrature point, not the zero point. Therefore, the signal amplitude is all positive, and the signal has no inflecti...

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  • Optical transmission method and device based on power spectrum shaping
  • Optical transmission method and device based on power spectrum shaping
  • Optical transmission method and device based on power spectrum shaping

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Embodiment Construction

[0052] An optical transmission method and device based on power spectrum shaping proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims.

[0053] The optical transmission method based on power spectrum shaping provided by the present invention includes that the transmitting end encodes the data sequence to be sent into a power spectrum shaping electrical signal, and modulates the power spectrum shaping electrical signal into a power spectrum shaping optical signal and sends it to the receiving end; The end receives the power spectrum shaping optical signal and converts it into an electrical signal, and after the electrical signal is converted into a digital signal through analog-to-digital conversion, the digital signal is subjected to clock recovery and nonlinear equalization proce...

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Abstract

The invention discloses an optical transmission method and device based on power spectrum shaping. Direct detection, namely square demodulation, of high-spectrum-efficiency optical signals is supported. According to the invention, a power spectrum shaping modulation method is adopted at a sending end, and the modulation method realizes multi-level improved dual-binary coding and multi-level offsetdual-binary coding by biasing a Mach-Zehnder optical modulator at a zero point, namely Vpi, and increasing level in combination with nonlinear precoding, and can also realize residual sideband improved dual-binary coding in combination with an optical filter; inter-symbol interference of received signals is removed at a receiving end by adopting nonlinear equalization, and meanwhile, the difference of received levels can be fed back to a transmitter, so that non-equidistant multi-level modulation is realized, and the nonlinear equalization complexity is reduced. According to the method, signals needing coherent demodulation can be directly detected through proper nonlinear precoding and nonlinear equalization, so that the hardware complexity is reduced.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an optical transmission method and device based on power spectrum shaping. Background technique [0002] In recent years, optical communication has become the preferred research object for internal interconnection, external interconnection and access of data centers, which can meet the increasing bandwidth requirements of enterprises or operators for information and data processing systems. With the proposal of the tactile Internet, in addition to bandwidth, the quality of service requirements have increased ultra-low latency, high reliability, high availability, and high security. Among them, the requirement of ultra-low latency can be realized by optimizing the transmission scheme, while high reliability can be realized through redundant coding, high availability can be realized through redundant resource backup, and high security can be realized throu...

Claims

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Application Information

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IPC IPC(8): H04L25/03
CPCH04L25/03828
Inventor 冯达蒋伟进郁军伟
Owner 湖南工商大学
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