In-vehicle PLCMilad 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.

• Wiring harness is the most expensive & complicated electrical component!

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Motivation• Want to ↓ comm. network complexity

• ↓ weight & price

• ↑ transmission reliability

• ↑ throughput

• Every elec. equipment has a power line

Use POWER-LINE

Data CommunicationMilad Mohammadi

Example

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We are interested in high connectivity

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

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• Two-port Network

• S-Parameters

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

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Direct Path

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)

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50th, 10th and 1st percentiles of insertion gains as function of frequency.

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