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Optimal power distribution method of ACO-OFDM in VLC system

An optimal power and allocation method technology, applied in the field of visible light communication, can solve problems that are rarely studied and Gaussian distribution input is difficult to generate

Active Publication Date: 2020-08-21
徐州智谷光频产业研究院有限公司
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Problems solved by technology

[0007] However, the existing ACO-OFDM research EE is based on Gaussian distribution input
As mentioned earlier, Gaussian distributed inputs are difficult to generate in practice, and real inputs are always finite alphabetic inputs, which are rarely studied in the literature

Method used

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Embodiment

[0228] This embodiment provides simulation results to verify the results of the present invention, and verify from the optimal energy efficiency problem about Gaussian input distribution and bounded input distribution.

[0229] The ACO-OFDM VLC system includes 4 LEDs, and other basic parameters of the VLC system are listed in Table 1.

[0230] Table 1

[0231] Definition value Number of subcarriers, N 64 Transmit angle, θ 60° FOV, Ψ 90° Lambertian emission order, m 1 Dimming level, η 1 Half power angle, Φ 1 / 2

60° PD collection area,A r

1cm 2

Circuit power consumption, P c

0.1W Angle of arrival / departure,ψ 45° Noise PSD, σ 2

10 -18 A 2 / Hz

Modulation order, M 4-QAM Bandwidth of(2i-1)subcarrier,W 2i-1

1MHz

[0232] In Table 1, starting from the second row, the parameters of each row are: the number of subcarriers, the emission angle, the receiving field of vi...

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Abstract

The invention provides an optimal power distribution method of ACO-OFDM in a VLC system. The optimal power distribution method is used for solving the problem of energy efficiency (EE) of asymmetric amplitude limiting optical orthogonal frequency division multiplexing (ACO-OFDM) of visible light communication (VLC). According to the method, the achievable rates of capacity achievement Gaussian distribution input and actual finite letter input are derived firstly; however, quality of service, power, and dimming control constraints are taken into account, thereby further analyzing and solving the non-convex EE maximization problem of ACO-OFDM VLC with Gaussian distribution input and limited letter input, respectively. According to the method, the problems are solved through the proposed Dinkelbach type iterative algorithm. The performance of the proposed optimal power allocation scheme for EE maximization is verified through numerical analysis.

Description

technical field [0001] The invention relates to the field of visible light communication, in particular to an optimal power allocation method of ACO-OFDM in a VLC system. Background technique [0002] Traditional radio frequency (Radio Frequency, RF) communication is facing a situation of spectrum constriction, therefore, the demand for wireless data traffic is increasing exponentially. Additionally, wireless devices consume a huge amount of energy, accounting for more than 3% of global energy consumption and, by 2020, approximately 5% of total global carbon dioxide emissions. Therefore, both spectrum and energy resources are severely constrained for next-generation wireless communications. Driven by low-cost and widely installed lighting infrastructure with light-emitting diodes (LEDs), visible light communication (VLC) has emerged as a promising green indoor communication solution capable of simultaneous lighting and wireless data transmission. Due to its inherent advan...

Claims

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Application Information

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IPC IPC(8): H04B10/116H04B10/564H04B10/516H04L27/26
CPCH04B10/116H04B10/5161H04B10/564H04L27/2601
Inventor 马帅鲁姗妹刘婷婷李世银
Owner 徐州智谷光频产业研究院有限公司
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