Transcript In-vehicle PLC - University of British Columbia

In-vehicle PLC
Milad Mohammadi
L. Lampe, M. Lok, S. Mirabbasi, M. Mirvakili, R.
Rosales, & P. van Veen
Outline
1. Background
2. Past Work
3. Present Work / Results
4. Future Work
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1. Background
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Significance
• Wiring Length:
• 1955: 45m
• 2002: 4km
• Today:
• 80% of auto-innovations stem from
electronics.
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• Wiring harness is the most expensive &
complicated electrical component!
Motivation
• Want to ↓ comm. network complexity
• ↓ weight & price
• ↑ transmission reliability
• ↑ throughput
• Every elec. equipment has a power line
 Use POWER-LINE
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Data Communication
Example
We are interested in high connectivity
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2. Past Work
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Past Work
• PSA Peugeot Citroen
• University of Lille, France
• Channel Characterization & Modeling
• Transfer Function
• Load
• Noise
• Impulse Response
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Past Work
• PSA Peugeot Citroen
• University of Lille, France
• Channel Characterization & Modeling
• Transfer Function
• Load
• Noise
• Impulse Response
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3. UBC PLC Project
Present Work
• Pontiac Solstice 2006
• University of British Columbia, Canada
• Channel Characterization & Modeling
• Transfer Function
• Load
• Noise
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Present Work
• Pontiac Solstice 2006
• University of British Columbia, Canada
• Channel Characterization & Modeling
• Transfer Function
• Load
• Noise
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Setup
• Two-port Network
• S-Parameters
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Setup
• 8 Nodes
• 12 Vehicle States
• 211 Measurements
• Freq. Range: 500kHz – 100MHz
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Results
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Insertion Gain
• Insertion Gains of the
“Cigarette Lighter  Computer Unit” link.
• Vehicle at 12 different states
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Insertion Gain
Indirect Path 
 Direct Path
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Insertion Gain
• Direct Path
• Indirect Path
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Impedance
• |Zin| at two different vehicle states
• Important for Modem Design
Front Right Light
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Statistics: Fixed Gain
• CDF Plot of all Measurements.
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Statistics: Fixed Freq.
• Multiple Freq. (eg FSK)
50th, 10th and 1st percentiles of
insertion gains as function of frequency.
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4. Future Work
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Future Work
• Impulsive Noise
• Impulse Response
• Performing Data Communication
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Group Website
Our measurement data are open-source & available at:
http://www.ece.ubc.ca/~lampe/VehiclePLC.html
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Thank You!
UBC In-vehicle PLC Group
http://www.ece.ubc.ca/~lampe/VehiclePLC.html