Mode division modulation and multiplexing communication method based on POV light under ocean turbulence condition

A technology of multiplexing communication and wireless optical communication, which is applied in the field of underwater wireless optical communication

Active Publication Date: 2021-05-18
XIDIAN UNIV
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Problems solved by technology

[0004] The current problem is that the marine wireless communication s...

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  • Mode division modulation and multiplexing communication method based on POV light under ocean turbulence condition
  • Mode division modulation and multiplexing communication method based on POV light under ocean turbulence condition
  • Mode division modulation and multiplexing communication method based on POV light under ocean turbulence condition

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Embodiment Construction

[0037] In order to make the purpose, technical solution and advantages of the present invention more clear, the following will further describe in detail in conjunction with the accompanying drawings and specific embodiments. This embodiment only shows the principle description of the present invention, and does not represent any limitation to the present invention.

[0038] The mode division modulation and multiplexing communication method based on POV light in the ocean turbulence environment of the present invention is characterized in that it comprises the following steps:

[0039] Step 1. Based on the ABCD optical system, a diffraction model of POV-like light in free space is established, and the far-field distribution expression of POV light is obtained.

[0040] 1a) Given the source plane light field distribution of the POV beam generated by BG light:

[0041] Among them, the form of POV light generated by the BG beam through the Fourier prism is:

[0042]

[0043]...

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Abstract

The invention discloses a mode division modulation and multiplexing communication method based on POV light under an ocean turbulence condition. The method comprises the steps: building a diffraction model of POV-like light in a free space based on an ABCD optical system, and obtaining a far-field distribution expression of the POV light; further obtaining a mathematical expression of the OAM detection probability spectrum disturbed by the ocean turbulence; selecting wave parameters of POV light suitable for turbulent ocean wireless optical communication; selecting a phase power spectrum function and a phase screen interval suitable for simulating transmission of POV light in the multi-layer phase screen; calculating instantaneous attenuation and transfer factors of POV light; and constructing a mode division modulation and channel multiplexing communication model based on POV light. According to the method, the POV light is applied to the UWOC system which is limited by ocean turbulence and based on the mode division modulation and channel multiplexing technology, and compared with a UWOC communication system based on traditional vortex light, the method has superior communication performance.

Description

technical field [0001] The invention belongs to the technical field of underwater wireless optical communication, and specifically relates to a method for mode division modulation and channel multiplexing communication by using a POV beam with a constant beam radius under the action of ocean turbulence. Background technique [0002] Underwater Wireless Optical Communication (UWOC) is a new line-of-sight transmission communication technology that uses laser as the carrier and seawater as the transmission medium to achieve two-way communication. Because of its frequency bandwidth, high transmission speed, strong anti-interference ability, strong confidentiality and small size, it has the potential to realize high-speed and large-capacity communication. At the same time, Orbital Angular Momentum (OAM) is a property of vortex photons, which provides a new degree of freedom for light waves carrying information different from amplitude, phase, frequency and carrier, which can furt...

Claims

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Application Information

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IPC IPC(8): H04B10/80H04J14/04
CPCH04B10/80H04J14/04
Inventor 王平王炜聂元昊庞维娜李爽
Owner XIDIAN UNIV
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