power line carrier communications

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Presenter: D. Shyam Sunder-08w01a0446Power Line Carrier Communication(PLCC)

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This Particular Statement at US Department of Commerce shows the need forTechnologies Like PLCC which make the Big World smaller

´ We Need to get Broadband to

More Americansª.One Great

Opportunity for that is PLCCµ

24June2004

George W Bush, President.USA

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Strategy

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Is the Idea Efficient than other Services ?

0.56

10

38

28

52

45

0.25

5

25

14

40

35

0 10 20 30 40 50 60

TelePhone

Cable

Satellite

WiFi

Optical Fiber

PLCC

Speed in Mbps

Upload(Mbps)

Download(Mbps)

In Terms of Cost

the OFC and the PLCC

Would Stand the

Same

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Modulation -Why OFDM ?

OFDMSpread Spectrum

TechniquesSingle Carrier

Spectral Efficiency Good Moderate Moderate

Robustness Against Channel 

DistortionsExcellent Poor Good

Robustness Against Impulsive

NoiseFair Fair Good

Ability to adapt to channel changes

Excellent Fair Good

Implementation Costs

(Equalizers.etc.)Fair Poor Poor

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Superimposition of Signals Over Power Lines

2 ways to do

Inductive coupling

Capacitive coupling

Safer way to go is with 

inductive coupling, but has

chance of signal loss

Fig. AM with PCM (as in DSL)

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Interference

Every Conducting wire

Radiates EMW

Radio Services Face

Interference

However FCC

Regulation Part15 says

a BPL should notRadiate

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Applications

Tx Networks

Home Automation

Telecomm

Automatic Meter

Reading

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PLCC for Broad Band Networks

BPL At the Pole

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Bridge

Coupler

Backhaul 

Point

Coupler

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Power Line Modem (PLM)

PGA-Programmable Gain Amp

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PLCC In Meter Reading

Multi Function

Node

Concentrator and

Communication

Node

Operation and

ManagementSystem

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PLCC In Home Automation

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PLCC In Action

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Noise

Impulse noise-due to SCR(ac switch)

Smooth spectrum noise-sum of all low power noises Single event impulse noise

Major portion of noise

Due to thermostat, transient devices, capacitors, 

lightening

Background Noise

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STANDARDS

FCC Freq Range 0-530Khz

IEEE 1901

Uses 2 Layers

One For Physical Media

Another for Modulation

Home Plug Power Alliance

Uses Reed Solomon coding

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PLCC In India

Most Indian Rural areas doesn·t have any

broadband DSL lines

This would be a boon to rural india,if implemented

on a full scale

Hope for a better Broad Band in India

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CONCLUSION

´PLCC IS AN EFFECTIVE WAY

FOR BROADBAND & OTHER

COMMUNICATIONS OVER

POWERLINES BUT NEEDS TO

REPLACE EXISTING

POWERLINES µ