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Monte Carlo simulation method for underwater uplink laser communication

A simulation method and laser communication technology, applied in the field of communication equipment, can solve the problems of inability to accurately model the photon scattering position, incomplete simulation of the underwater environment, errors, etc.

Inactive Publication Date: 2019-07-09
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to ensure the stability of underwater communication, it is necessary to simulate underwater communication. The current underwater communication simulation method does not completely simulate the underwater environment when performing photon simulation, and the scattering position of photons cannot be accurately modeled. Therefore, there are big error

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  • Monte Carlo simulation method for underwater uplink laser communication
  • Monte Carlo simulation method for underwater uplink laser communication
  • Monte Carlo simulation method for underwater uplink laser communication

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Embodiment Construction

[0092] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0093] figure 1 A schematic flow chart of the Monte Carlo simulation method for the underwater uplink laser communication provided by the present invention; figure 1 As shown, the Monte Carlo simulation method of underwater uplink laser communication includes:

[0094] Determine the initial coordinates of the photon, including:

[0095] Get the initial amount of photons,

[0096] Sampling the Gaussian light source of the laser to generate the initial light source;

[0097] Calculate the next coordinate position based on the last photon coordinate position, including:

[0098] Generate random free steps for photons,

[0099] Generate initial scattering angles from the scattering phase function, determine random azimuth angles,

[0100] Determine the cosine of the photon's initial transmission direction;

[0101] According to the different heights ...

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Abstract

The invention provides a Monte Carlo simulation method for underwater uplink laser communication. The Monte Carlo simulation method for underwater uplink laser communication comprises the steps that the initial coordinates of photons are determined, that is, the initial quantity of the photons is obtained, a Gaussian light source of laser is sampled, and an initial light source is generated; a next coordinate position is calculated according to the previous photon coordinate position,that is, a random free step length of photons is generated, an initial scattering angle is generated by a scattering phase function, a random azimuth angle is determined, and an initial transmission direction cosine of the photons is determined; and whether the photons are scattered in the next step is judgedaccording to different heights of the photons. According to the Monte Carlo simulation method for underwater uplink laser communication, scattering and weight attenuation of photons in the transmission process are simulated, the scattering positions and weights of the photons are further calculated and judged, the underwater communication condition is accurately simulated, and important guiding significance is provided for improving the quality and stability of underwater communication.

Description

technical field [0001] The invention relates to the technical field of communication equipment, in particular to a Monte Carlo simulation method for underwater uplink laser communication. Background technique [0002] Water-washed laser communication is a technology that uses the seawater transmission window-blue-green laser as a carrier for communication. The underwater laser communication system is as follows: information→compression coding→modulate laser→transmit→receive→filter→demodulate→decode→information recovery. The characteristic of blue-green laser is that it can penetrate clouds and seawater. Compared with electromagnetic waves, it has strong directionality, good information concealment, and high information transmission rate (up to thousands of bits per second). It can be used for cooperative communication and command communication. The former refers to the communications between submarines and aircraft and submarines; the latter refers to the command and contr...

Claims

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Application Information

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IPC IPC(8): H04B10/073H04B10/70H04B10/80
CPCH04B10/073H04B10/70H04B10/80
Inventor 刘力许梦昊
Owner XIDIAN UNIV
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