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Simulation method of photon transmission performance

A technology of transmission performance and simulation method, applied in the field of laser communication, can solve problems such as no-mentioned errors, and achieve the effect of accurate simulation data and accurate simulation results

Active Publication Date: 2012-07-18
DALIAN UNIV
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Problems solved by technology

However, in the existing research materials using the Monte Carlo method to simulate the communication between the spaceborne or airborne laser and the underwater receiving platform, there is no mention of the error generated when encountering boundary conditions

Method used

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  • Simulation method of photon transmission performance
  • Simulation method of photon transmission performance
  • Simulation method of photon transmission performance

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 Shown, the inventive method comprises:

[0018] Step 1: Set the number of photons to be simulated, the initial state of each photon and the optical characteristic parameters of the medium. The initial state includes photon coordinates r (X, Y, Z), photon motion direction ψ, photon motion path length l, photon energy weight W; medium optical characteristic parameters include medium absorption coefficient μ a , medium scattering coefficient μ s .

[0019] Step 2: Emit photons according to the initial state, and track the transmission path of each photon. During the tracking process, the modified Monte Carlo method is used to track the photons passing through the medium interface or receiving plane.

[0020] Since the step ...

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Abstract

The invention discloses a simulation method of photon transmission performance, comprising the steps of 1, setting to-be-simulated photon number, original state of each photon and medium optical characteristic parameters; 2, according to the original state, emitting the photons, tracking the transmission path of each photon; using a corrected Monte Carlo method to track the photons passing through a medium interface or a receiving plane during the tracking; 3, based on a tracking result, performing statistical calculation, generating and displaying a spot distribution graph, a multi-path delay probability graph, the largest multi-path time delay, 63% photon average multi-path time delay, the largest time delay, residual photon number. The method improves the corrected Monte Carlo method for the medium interface and the receiving plane on the photon movement path, so that a simulation result is more accurate; the method provides more accurate simulation data for further developing laser-underwater receiving platform communication system.

Description

technical field [0001] The invention belongs to the field of laser communication, in particular to a method for simulating photon transmission performance in the process of laser communication with an underwater receiving platform. Background technique [0002] In the field of laser communication, due to the instability of the atmosphere and seawater, various environmental parameters involved in the optical transmission process have great randomness, and the transmission of light in the atmosphere and seawater is almost impossible due to the influence of multiple scattering Use analytical method to describe the transmission process of optical signal. In addition, the cost of spaceborne laser-to-underwater receiver communication test tools and tests is high, and in the laboratory environment, some parameter selections are limited by experimental conditions (such as the attenuation coefficients of seawater and atmospheric layers, etc.), and all parameters are obtained complete...

Claims

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Application Information

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IPC IPC(8): H04B10/00H04B10/70
Inventor 丁元明宋琳蔡睿妍刘治国原程
Owner DALIAN UNIV
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