15 09 0654-00-0007 mimo vlc scheme for scalable data rate transmission

8/3/2019 15 09 0654-00-0007 Mimo Vlc Scheme for Scalable Data Rate Transmission

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Kye San Lee.Jae Sang Cha,Yeong Min Jang et al.Slide 1

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: MIMO-VLC scheme for Scalable Data Rate Transmission

Date Submitted: September 2009

Source: *Kye San Lee [Kyunhee Univ] **.Jae Sang Cha[ Seoul National Univ. Of Technology], ***Yeong Min Jang[ Kookmin Univ.]Dong Ho Cha [Kyunhee Univ], Su Jin Bae[Kyunghee Univ.]

Address

Voice:82-10-4455-4370, 5624, E-Mail: * [email protected], ** [email protected], **[email protected]

Re:

Abstract: MIMO-VLC scheme for Scalable Data Rate Transmission

Purpose:

Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for

discussion and is not binding on the contributing individual(s) or organization(s). The material in thisdocument is subject to change in form and content after further study. The contributor(s) reserve(s) the right

to add, amend or withdraw material contained herein.

Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE

and may be made publicly available by P802.15.


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y Background :

y Visible Light Communication system(VLC)y Combined system with LED Lighting & Communication

with some advantages as

< lighting device>

y low power consumption

y longer lifetime

y small size

y etc

< communication device >

y Visible LED light has higherpower than IR wireless comm.

y New Green comm. Tech.

y No EMI/EMC to human body

+

y Demand of VLC applications (Multimedia services,P2P

service etc.) require more increased (high) data

transmission


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y Application example :

yMobile to Mobile Service (P2P) usingBluetooth or UWB

y Bluetooth : 2Mbps (Low rate)

y UWB :450 Mbps (High rate)

y However, EMI & Frequency interference problems

are severe

y MIMO-VLC scheme with Scalable Data Ratetransmission structure could be one solution of above

limitations


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y Proposed system

y Scalable data rate : < 1G bps

y MIMO-VLC Scheme

y based on VLC with OFDM & MIMO technology.

y It does not suffer from EMI.


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y Proposed system

y Could accommodate the increased demand ofMultimedia services.

y Could achieve Scalable (High/Medium/Low) Date

Transmission.

y

Use OFDM & MIMO technology.y Use Multiplexing technique using R,G,B LED waves


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y System Description.

y

Transmission Side

y Receiver Side


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y System Description.

y Diversity Gain Scheme.

y Transmit different data - increase data rate

y Transmit same data - frequency diversity


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Fig. 1-1. VLC-MIMO scheme in the Case of.

1-chip LED

Concept of MIMO-VLC


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Fig. 1-2. VLC-MIMO scheme in the case of . Fig. 1-3. VLC-MIMO scheme in the case of .

Concept of MIMO-VLC


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Semiangle at half power

FOV of a terminal

Physical area of a PD

60.0[deg]

74.0[deg]

1.0[cm2]

Optical modulationPrimary modulation

Original data rate of each color

Original data rate of 1chip

Background light noise

Optical channel model

IM-DD

OFDM-BPSK

400[Mbps]

400[Mbps]

0.0[dBm]

Directed LOS path

(only AWGN channel)

O/E conv. Efficiency of blue LED

O/E conv. Efficiency of green LED

O/E conv. Efficiency of red LED

0.40[A/W]

0.48[A/W]

0.52[A/W]

O/E conv. Efficiency of 1chip LED 0.53[A/W]

TA

BLE 1. simulation parameters

red green blueEfficiency

(lm/W)

type 1

Mixture

ratio

1 0.89 2.51 291

type 2 1 1.43 2.29 317

type 3 1 2.62 1.96 391

type 4 1 11.17 7.19 413

TA

BLE 2. The mixture ratio of three colors[1]

Simulation Parameter


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VLC-OFDM with 3-chip white LEDs for the frequency diversity gain.

Fig. 2. BER performance of the 3-chip OFDM system for the increaseof capacity compared with the 1-chip OFDM system in delay time 8ns

Fig. 3. BER performance of the 3-chip OFDM system for the frequencydiversity gain compared with the 1-chip OFDM system in delay time 8ns

Simulation example of VLC-OFDM


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Conclusion Presented MIMO-VLC scheme is based on OFDM technique.

MIMO-VLC technologies could achieve various Data Rate.

Furthermore, proposed scheme also could be applied for

various VLC applications with Scalable Data Rate.

15 09 0654-00-0007 mimo vlc scheme for scalable data rate transmission

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