Abstract— The main scope of my project to provide data transmission without wired connection or WiFi technology instead of using wireless medium of light spectrum Wireless communication is an essential part of next generation for communication system. Our paper presents the implementation of an integration technique used to combine power line communications (PLC) and visible light communications (VLC) channels in inter-building scenarios. So we use the Narrow Band Power Line Communication (NBPLC) such as the Phase-shift keying (PSK) is used to convey the information over the PLC link and color shift keying (CSK) technique is used on the VLC link. Visible Light Communication (VLC) based on white Light Emitting Diodes (LEDs) is used for transmitting the data to long range communication without any obstacles. Finally implementation of visible light communication in our system for data transmission

Index Terms— PLC, VLC, shift Keying, RGB, White

LED.

INTRODUCTION

It is a new paradigm of revolution which is a

continuation of the trend to move toward higher

frequency spectrum in the field of indoor wireless

communication. If we talk about high speed indoor

wireless communication, can bring new dimension in

term of data communication speed by utilizing visible

light spectrum. The concept behind this technology is

that the data can be transmitted with the help of light

emitting diode (LED) bulbs and transmission rate can

be control by using intensity of LED bulb which can

be varies even faster than light intensity human eye

can observe.

Communication system is different from Visible light

communication (VLC) system because VLC is only a

point to point communication system while is a proper

wireless based networking system which supports

point to multipoint communication. In our system,

data rate can be related with LED’s so LED’s

selection plays a vital role. Parameters like LED’s

size, ON-OFF speed and number of LED’s can affect

data rate of the communication model

LITERATURE SURVEY:

Light transmit is a wireless communication

system in which light is used as a carrier signal

instead of traditional radio frequency. Visible light

communication (VLC) uses rapid pulses of light to

transmit information wirelessly.[1] Jyoti Rani,

Prerna Chauhan, Ritika, The peak signal with 100

INTEGRATED PLC-VLC USING VARIOUS SHIFT KEYING TECHNIQUES

M.H Zeenathunnisa #1 and U.Arun Kumar *2 # Department of Electronic Communication Engineering, Meenakshi Rrmaswamy Engineering College, Ariyalur,

TamilNadu * Asst. Prof of ECE, Meenakshi Rrmaswamy Engineering College, Ariyalur, TamilNadu

luminous per watt is more not efficient than the

incandescent and fluorescent bulbs. A high efficient

SMPS is used to convert from AC to DC voltage to

increase the power efficiency. [2] Megha

Goyal,Dimple Saproo,Asha Bhagashra, Phase shift

keying is typically implemented using vlc light bulbs

at the downlink transmitter. However, by fast and

subtle variations of the current, the optical output

cannot be made to vary at extremely high speeds.[3]

Schnichiro Haruyama,The concept of light data

communication on fast flickering of light which is

not detected by human eye but it is focused on photo

detector which converts the on-off state into binary

digital data.[4] Z. Jia, purtioee.M, Each light fixture

in the application environment becomes a separate

data channel. These channels can supply different

data into each separate pool of light, delivered at the

full rated download speed for that channel.

Minimum-security levels power lines do not

necessarily provide a secure media. Data attenuation

due to the presence of numerous elements on a

power line network, data attenuation is likely to be

an issue.

PROPOSED SYSTEM:

The PLC/VLC shift technique is analyzed with

the channel model of PSK and CSK. A system

of white LED’s is integrated with the PLC

channel using frequency-shift keying and phase

shift keying. The interface between PLC and

VLC channels using binary frequency shift

keying. The On-Off keying is used for low bit

rate error occurrences while transmitting the

data. The result of VLC channel system is

imposed by the bad channel, and produces a

noise of data variation by using the PSK without

a Pulse with Modulation technique.

SCOPE:

The PSK-CSK mapping method is done by

using the PLC MODEM and VLC Communication.

The time parameters are using for the testing of data

sending through PLC and VLC, so therefore there is

a need of Intensity Modulation (IM). In IM signal is

modulated in to optical signal of instantaneous

power. This signal is received at a receiver by using

Direct Detection (DD) method. In Direct Detection

(DD) a photodiode is used to convert the optical

signal power into a proportional current. Finally the

data is transmitted without any external hardware

device.

Visible light communication (VLC) is “A potential solution to the global wireless spectrum shortage” Light Fidelity” is a fast and cheap optical version of Wi-Fi, the technology of which is based on Visible Light Communication (VLC).VLC is a data communication medium, which uses visible light between 400 THz (780 nm) and 800 THz (375 nm) as optical carrier for data transmission and illumination. It uses fast pulses of light to transmit information wirelessly. The main components of this communication system are 1) a high brightness white LED, Which acts as a communication source and 2) a silicon photodiode which shows good response to visible wavelength region serving as the receiving of data light to generate the flicking rate.

ARCHITECTURAL DESIGN:

It is possible to encode data in the light by varying the rate at which the LEDs flicker on and off to give different strings of 1s and 0s. The LED intensity is modulated so rapidly that human eyes cannot notice, so the output appears constant. More sophisticated techniques could dramatically increase VLC data rates.Finally we are are focusing on parallel data transmission using arrays of LEDs, where each LED transmits a different data stream. Other groups are using mixtures of red, green and blue LEDs to alter the light's frequency, with each frequency encoding a different data channel

Input message

PLC channel

PLC Transmitter

PLC/ VLC Modem

LED

VLC receiver

Output message

Fig 2: Block Diagram

It has three different methods:

• On-off keying (OOK),

• Pulse Width Modulation (PWM),

• Pulse position modulation (PPM).

On-Off keying (OOK)

PC Computer

Light Dependent Resistor (LDR)WHITE LED

ATMEGA 32

Micro Controller

Transmitter side

(TX 230 Port)

PC

Computer

Recvier Side

(RX 230 Port)

Communication through White LED

Power Supply

We propose a system based on PSK and CSK

modulation techniques to link PLC and VLC

channels for inter-building applications. The CSK

technique exploits the color wheel method to map

complex symbols to colors. A CSK transmitter

redistributes the observed PLC symbols over the

VLC channel using red-green blue LEDs (RGB

LEDs). When the binary input (fb) changes from a

logic 1 to a logic 0 and vice versa, the FSK output

frequency shifts from a mark ( fm) to a space (fs)

frequency and vice versa. In the mark fre

the higher frequency (fc + ∆f) and the space

frequency is the lower frequency (fc

this relationship could be just the opposite.

Fig 2: Data Transmit

Pulse Width Modulation / Pulse Position

Modulation (PWM)

Pulse-width modulation (PWM) is a modulation

process which is used to convert the carrier signal of

Binary frequency shift keying into phase shift

keying is used to create a square wave a signal is

switched On / OFF.

We propose a system based on PSK and CSK

modulation techniques to link PLC and VLC

building applications. The CSK

technique exploits the color wheel method to map

complex symbols to colors. A CSK transmitter

C symbols over the

green blue LEDs (RGB-

LEDs). When the binary input (fb) changes from a

logic 1 to a logic 0 and vice versa, the FSK output

frequency shifts from a mark ( fm) to a space (fs)

frequency and vice versa. In the mark frequency is

∆f) and the space

frequency is the lower frequency (fc - ∆f), although

ship could be just the opposite.

Data Transmit

Pulse Width Modulation / Pulse Position

) is a modulation

which is used to convert the carrier signal of

Binary frequency shift keying into phase shift

keying is used to create a square wave a signal is

CIRCUIT DIAGRAM FOR

EXPERIMENTAL SETUP

Fig 3: Circuit Diagram

VLC integrates CSK modulators. CSK

modulator is made up of the RGB. The CSK

receives the single pixel by user of COMS

(Complementary Metal Oxide Semiconductor).It

is low cost converts light signal into voltage

sensor. Amplifies and modulates the signal by

the combination of photodiode array with the

help of amplifier. Finally both the sender is

connected with Arduino UNO used for analog to

digital/ and digital to analog.

using the BFSK and BPSK.the

is between the pc to pc is managed through the

onboard arduino UNO

code acts as a (USB/UART).

the virtual com port driver.

CIRCUIT DIAGRAM FOR

EXPERIMENTAL SETUP

Circuit Diagram

VLC integrates CSK modulators. CSK

modulator is made up of the RGB. The CSK

receives the single pixel by user of COMS

(Complementary Metal Oxide Semiconductor).It

is low cost converts light signal into voltage

fies and modulates the signal by

the combination of photodiode array with the

Finally both the sender is

connected with Arduino UNO used for analog to

digital/ and digital to analog. Finally we are

using the BFSK and BPSK.the communication

is between the pc to pc is managed through the

UNO we embedded a default

code acts as a (USB/UART). Finally download

the virtual com port driver.

Table1: Data Communication of VLC:

S.No Features PLC/ VLC

1. Opeation Transmits data by White LED

2. Inference Not have issues in this waves

3. Technology Visible Light

4. Speed About 1 Gbps

5. Frequency

10,000 times frequency spectrum of radio

6. Coverage distance

about 7 to 10

IMPLEMENTATION ANALYSIS:

SOFTWARE DESIGN:

It involves an adaptation of MAPLE to the

MATLAB language. Simulink (Simulation and link)

is developed by Math Works as an add

MATLAB. It is a graphical programming language

which offers modeling, simulation and analyzing of

multi domain dynamic systems under Graphical

User Interface (GUI) environment.

Fig4 :Bit Error Rate

Table1: Data Communication of VLC:

PLC/ VLC

Transmits data by White LED

Not have issues in this

Visible Light

About 1 Gbps

10,000 times frequency spectrum of

7 to 10 meters

IMPLEMENTATION ANALYSIS:

It involves an adaptation of MAPLE to the

MATLAB language. Simulink (Simulation and link)

is developed by Math Works as an add-on with

MATLAB. It is a graphical programming language

which offers modeling, simulation and analyzing of

domain dynamic systems under Graphical

Fig 5: PWM Signal Generation

HARDWARE DESIGN:

Fig 6: Hardware Components

Components

� AT Mega 231 Processor

� NRF Transmitter / Receiver

� White LED

� RGB Color shift Keying

� PC computer

: PWM Signal Generation

HARDWARE DESIGN:

: Hardware Components

AT Mega 231 Processor

NRF Transmitter / Receiver

RGB Color shift Keying

CONCLUSION:

I conclude that VLC communication is the future

based technology. Through this light

communication we can access and communicate

faster than radio waves. It uses Light spectrum

waves for connectivity. For effective and low

cost level data transmission in the absence of

wired connection is possible with the technology

of PLC into VLC method with the help of white

LED.

FUTURE SCOPE:

LIFI is a great platform to know about the data

transfer in wireless medium. Thus it enables us to

make use of LED as hotspot in similar manner as

WIFI dose. It will also enable us to exchange the

message in faster and easier manner. In this study

efforts have been taken to transfer the data using

LIFI between computers. The same can be

implemented using other devices.

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