nonlinear distortion compensation algorithm based on K-DNN and a visible light communication device

A nonlinear distortion and algorithm technology, applied in the field of visible light communication, can solve problems such as occupying system computing resources

Active Publication Date: 2019-06-18
FUDAN UNIV
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Problems solved by technology

However, the training process of the DNN equalizer requires up to thousands of training iterations, which consumes a lot of system computing resources.

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  • nonlinear distortion compensation algorithm based on K-DNN and a visible light communication device

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[0045] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to specific embodiments and accompanying drawings.

[0046] An embodiment of the present invention provides a visible light communication device based on a K-DNN compensation nonlinear distortion algorithm, which solves the problem that the existing visible light communication device based on a DNN compensation nonlinear distortion algorithm requires a large number of iteration training times and occupies a large amount of computing resources. .

[0047] The present invention utilizes the K-DNN nonlinear distortion compensation algorithm in the PAM underwater VLC system, comprising the following steps:

[0048] The first step: convert the serial signal after linear equalization by the adaptive linear equalizer into a parallel signal, and then use the parallel signal as a feature vector input to ...

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Abstract

The invention belongs to the technical field of visible light communication, and particularly relates to a nonlinear distortion compensation algorithm based on K-DNN and a visible light communicationdevice. The method provides a nonlinear distortion compensation algorithm, and comprises the following steps: converting a serial signal passing through an adaptive linear equalizer into a parallel signal, and inputting the parallel signal as a feature vector into a DNN equalizer assisted by a kernel function; through K-DNN training, classifying the feature vectors into a category with the maximumprobability to obtain an original signal; The device adopts the nonlinear distortion compensation algorithm and structurally comprises a transmitting end and a receiving end, and the receiving end carries out offline processing on signals through a processing chip and comprises the steps of using a S-MCMMA's adaptive post-equalizer to compensate linear distortion; using K-DNN equalization and demapping for nonlinear distortion compensation to obtain the original signal.. The method can conveniently and efficiently compensate the nonlinear distortion of the signal caused by the complex channelenvironment in the existing underwater wireless optical communication, and has important practical significance.

Description

technical field [0001] The invention belongs to the technical field of visible light communication, and in particular relates to a K-DNN-based nonlinear distortion compensation algorithm and a visible light communication device. Background technique [0002] In recent years, due to the rapid development of white LEDs, the research on LED-based visible light communication (VLC) technology has attracted more and more scientists' attention. VLC has the advantages of high speed, no electromagnetic radiation, eye safety and safety communication reliability. In particular, existing underwater wireless communication methods (acoustic communication, radio frequency communication) cannot meet the needs of high-speed and long-distance transmission. In LED-based VLC, since the wavelength of blue-green light is located in the transmission window of water (small absorption coefficient), blue / green LED-based VLC can achieve relatively long-distance and high-speed underwater communication...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/58H04B10/61H04B10/69
Inventor 迟楠赵一衡石蒙
Owner FUDAN UNIV
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