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Layer mapping light space diversity joint modulation laser communication coding and decoding method

An encoding and decoding method and a joint modulation technology, which are applied in the field of layer mapping optical space diversity joint modulation laser communication encoding and decoding, can solve the problems of low spectral efficiency and low transmission rate, shorten the synchronization time, reduce the probability of information interception and decoding, and improve the spectral efficiency. Effect

Active Publication Date: 2021-12-03
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is the low technical problem of spectrum efficiency and transmission rate existing in the prior art

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  • Layer mapping light space diversity joint modulation laser communication coding and decoding method
  • Layer mapping light space diversity joint modulation laser communication coding and decoding method
  • Layer mapping light space diversity joint modulation laser communication coding and decoding method

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Embodiment 1

[0037] This embodiment provides a layer-mapped optical space diversity joint modulation laser communication encoding and decoding method, the layer mapping optical space diversity joint modulation laser communication encoding and decoding method includes an encoding method and a decoding method, the encoding method corresponds to the decoding method, and the encoding method include:

[0038] Step 1, establish a layer mapping protocol, and perform layer mapping on the n-bit binary data to be transmitted according to the layer mapping protocol. The layer mapping includes PPM mapping and PAM mapping. After PPM mapping, M-PPM modulation is performed to obtain PPM pulses, and M is PPM modulation Order; after PAM mapping, perform L-PAM modulation to obtain PAM pulses, and L is the order of PAM modulation;

[0039] Step 2, using the pulse amplitude position judgment method to fuse the PPM pulse and the PAM pulse to obtain the PPAM pulse, and the PPAM pulse includes amplitude informat...

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Abstract

The invention relates to a layer mapping optical space diversity joint modulation laser communication coding and decoding method, which solves the technical problems of low spectrum efficiency and low transmission rate, constructs a spatial multiple-input multiple-output transmission mechanism by adopting a laser communication technology, improves the spatial multiplexing gain through optical space mapping in the spatial domain, and in the time domain, by combining the high spectrum efficiency of the PAM and the high energy utilization rate of the PPM, the technical scheme that the PPAM transmits information together is realized, and the problem is well solved; a wireless transmission mode is completed through laser index numbers, parallel data transmission is achieved through lasers of different combinations, and the problem that the requirement for the resolution of hardware equipment is high due to rising of modulation orders is solved. Meanwhile, multiple modulation technologies are combined and multiplexed, so that safe transmission of information is facilitated, the probability that a communication third party intercepts and decodes the information is reduced, byte framing is adopted, the synchronization time can be shortened, and the reliability and effectiveness of information transmission are further improved.

Description

technical field [0001] The invention relates to the field of laser communication, in particular to a layer mapping optical space diversity joint modulation laser communication encoding and decoding method. Background technique [0002] Laser communication takes into account the advantages of microwave communication and optical fiber communication. It has the advantages of concentrated energy, long transmission distance, no need to lay a large number of optical fibers, and can ensure large-capacity information transmission. With the rapid development of high performance of user terminals in the field of communication, high speed and high spectral efficiency have always been the goals pursued in the field of wireless optical communication (WOC), but the reliability will be reduced when meeting the requirements of efficient transmission, including atmospheric turbulence and Bad weather etc. have a direct impact on bit error performance. [0003] In the traditional single modul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/516H04B10/524H04B10/54
CPCH04B10/503H04B10/516H04B10/524H04B10/541H04B10/5161
Inventor 何宁邓乐坤蒋红艳廖欣
Owner GUILIN UNIV OF ELECTRONIC TECH
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