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A carrier phase estimation and compensation method and system

A technology of carrier phase and compensation method, applied in the field of communication, can solve the problems of small line width of Kalman filter, tolerance of residual frequency offset, and principal component analysis method cannot use probability shaping modulation format, etc., and achieves low complexity and excellent compensation. performance effect

Active Publication Date: 2021-07-16
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the principal component analysis method cannot be used for the modulation format of probability shaping, and the Kalman filter has a small line width and residual frequency offset tolerance.

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  • A carrier phase estimation and compensation method and system
  • A carrier phase estimation and compensation method and system
  • A carrier phase estimation and compensation method and system

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Embodiment Construction

[0073] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0074] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific ...

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Abstract

The invention discloses a carrier phase estimation and compensation method and system, wherein the method includes the following steps: acquiring a received signal, extracting a sample signal from the received signal; acquiring information on the first probability distribution of a target constellation diagram, combining the sample signal and The information of the first probability distribution estimates the first phase signal, obtains the final phase signal according to the first phase signal; compensates the received signal according to the final phase signal, and obtains the compensated received signal; wherein, the sample signal is compensated by the first phase signal, The KL divergence information between the second probability distribution and the first probability distribution of the sample signal becomes smaller; the KL divergence information includes KL divergence and / or cross entropy. Compared with the traditional BPS, the invention has lower complexity and better compensation performance than the existing Kalman filtering and principal component analysis, and can be widely used in the communication field.

Description

technical field [0001] The invention relates to the communication field, in particular to a carrier phase estimation and compensation method and system. Background technique [0002] Coherent detection and advanced modulation schemes based on probabilistically shaped (PS) constellation points are important technologies for realizing future high-speed and flexible optical communication systems. Estimation and compensation of carrier phase is an essential signal processing module in coherent optical communication systems. This problem is due to phase noise caused by the linewidth and / or residual frequency offset of the transmitter and receiver lasers, causing phase jitter / shift of the modulated signal, thus requiring phase estimation and compensation to restore the original signal. At present, many methods for estimating and compensating the carrier phase have been proposed in academia and industry. The traditional Viterbi-Viterbi (VV) algorithm is only applicable to the Qua...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/61
CPCH04B10/6165
Inventor 赵建
Owner SOUTH CHINA UNIV OF TECH