Aggregated VLC-RF system

A VLC-RF, aggregated technology, applied in the field of aggregated VLC-RF systems, can solve the problem of unknown reachable rate of the aggregated VLC-RF system

Active Publication Date: 2020-02-28
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the unique characteristics of visible light communication, the achievable rate of converged VLC-RF systems is still unknown

Method used

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Examples

Experimental program
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Embodiment

[0222] This embodiment provides simulation results to verify the results of the present invention, and analyzes the effectiveness of the aggregated VLC-RF system from the aspects of attainable rate and energy efficiency. The simulation results also verified the impact of key parameters such as total power threshold, dimming level, bandwidth, number of LEDs, and number of RF transmitting antennas on the attainable rate and energy efficiency of the aggregation system.

[0223] Consider a room of size (10×10×4.7m 3 In an aggregated VLC-RF system in ), one corner of the room is the origin of the Cartesian coordinate system (X, Y, Z). The transmitter of the VLC link includes 5 LEDs, and the positions of the LEDs are listed in Table 1. Furthermore, Table 2 summarizes the basic parameters of the VLC link and the RF link.

[0224] For clarity, define and For single LED and single antenna scenarios, and For multi-LED and multi-antenna scenarios.

[0225] Table 1

[0226] ...

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PUM

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Abstract

The invention provides an aggregation type VLC-RF system. The aggregation type VLC-RF system comprises a transmitter and a receiver, the transmitter comprises N light emitting diodes (LEDs) and M radio frequency (RF) transmitting antennas. The receiver comprises a photodiode PD and an RF receiving antenna. The system transmits information simultaneously through the VLC link and the RF link. According to the invention, a reachable rate expression is established under the constraints of peak optical power, average optical power and electric power. On the basis, an optimal power distribution scheme simultaneously meeting dimming control and power constraints is provided. And the optimal solutions of the single LED and the multiple LEDs under the inactive dimming control are given. When dimming control is in an active state, the SDR technology is further adopted to loosen the design problem of the optimal beam forming vector into convex SDP, and the problem can be effectively solved by using an interior point method.

Description

technical field [0001] The invention relates to a convergent VLC-RF system. Background technique [0002] Currently, with the rapid development of high-definition streaming video, cloud services and other wireless devices and IoT applications, wireless networks will face a crisis of radio frequency spectrum scarcity in the fifth generation (5G) and beyond. Therefore, both academia and industry are looking for alternatives to reduce the heavy traffic load from radio frequency (RF) wireless networks. [0003] Visible light communication VLC (Visible Light Communication) achieves high data rate and energy-efficient data transmission with its huge unlicensed bandwidth without causing interference to existing radio frequency communication systems; on the other hand, visible light communication is easily blocked, And radio frequency (RF) provides more coverage and reliable communication. In order to make full use of the advantages of visible light communication and radio frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B10/116
CPCH04B1/40H04B10/116
Inventor 马帅张凡陈永燕李世银
Owner CHINA UNIV OF MINING & TECH
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