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Time Error Compensation Method, Device and Readable Storage Medium for Laser Communication System

A time error, laser communication technology, applied in the field of laser communication, can solve the problems of poor information transmission quality, not very good effect, difficult to obtain channel gain, etc.

Active Publication Date: 2021-07-06
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

[0004] In order to solve the current situation that the information transmission quality of laser communication is not good due to the presence of time error and the introduction of intersymbol interference, related technologies usually adopt maximum likelihood equalization (maximum likelihood sequence detection, MLSD) to eliminate intersymbol interference after the channel information is known.
However, since the instantaneous channel gain is difficult to obtain, the effect of using maximum likelihood equalization to eliminate intersymbol interference is not very good

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  • Time Error Compensation Method, Device and Readable Storage Medium for Laser Communication System
  • Time Error Compensation Method, Device and Readable Storage Medium for Laser Communication System
  • Time Error Compensation Method, Device and Readable Storage Medium for Laser Communication System

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Embodiment Construction

[0068] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0069] The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order . Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device compris...

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Abstract

The application discloses a time error compensation method, device and computer-readable storage medium of a laser communication system. The method is applied to the receiver of the laser communication system, and all possible states of the Viterbi grid at the next time are determined based on the Viterbi grid state at the current moment of the Viterbi grid; the Viterbi grid state set includes the bits at the current time, the previous The sign of the time error between the bit at the moment and the bit at the current moment. Calculate the branch metrics of all possible states corresponding to the path according to the output data of the receiver, and calculate the cumulative metrics of all possible states according to the branch metrics; if the current moment meets the decision delay condition, judge the bit at the target time based on the cumulative metrics, and output The bit information after the decision is used as the bit value at the target time after time error compensation. On the basis of the unknown instantaneous channel gain and the unknown instantaneous time error of the laser communication system, the intersymbol crosstalk can be effectively eliminated by effectively compensating the time error of laser communication.

Description

technical field [0001] The present application relates to the technical field of laser communication, and in particular to a time error compensation method, device and computer-readable storage medium of a laser communication system. Background technique [0002] With the rapid development of information technology, the demand for data communication rate is also increasing day by day. Traditional radio frequency communication can no longer meet the actual demand of high speed, and laser communication technology has been developed rapidly. [0003] It is understandable that in a laser communication system, the laser communication process will be affected by factors such as atmospheric turbulence and pointing errors, which can cause power fluctuations and phase distortions at the receiving end of the optical signal. In addition, the time error is also a non-negligible factor that affects the signal transmission quality in the laser communication system. The time error can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/69H04L1/00H04L25/03
CPCH04B10/6971H04L1/0054H04L25/03337
Inventor 李亚添耿天文高世杰李学良马爽李林田若彤
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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