An optimal power allocation method of aco-ofdm in vlc system

A technology of optimal power and distribution method, applied in the field of visible light communication, which can solve problems such as rarely studied, Gaussian distribution input is difficult to generate, etc.

Active Publication Date: 2021-05-25
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 present invention provides an optimal power distribution method of ACO-OFDM in VLC system, which is used to solve the energy efficiency (EE) of asymmetric limiting optical orthogonal frequency division multiplexing (ACO-OFDM) of visible light communication (VLC) . The present invention first derives the achievable rate of capacity-realized Gaussian distribution input and practical finite alphabet input. However, considering the quality of service, power and dimming control constraints, the non-convex EE maximization problem of ACO‑OFDM VLC with Gaussian distribution input and finite alphabet input is further analyzed and solved. The present invention solves these problems through the proposed Dinkelbach-type iterative algorithm. The performance of the proposed optimal power allocation scheme for EE maximization is verified by 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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Patent Type & Authority Patents(China)
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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