Power Line Carrier Communications
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Transcript of 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