channel modelling for vehicle to vehicle communication (1)
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CHANNEL MODELLING FOR
VEHICLE TO VEHICLECOMMUNICATION
PRESENTED BY
NITHIN J PATHALIL
08EC140
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NEED FOR V2V COMMUNICATION
For making vehicle intelligent.
For road safety.
For making commuters aware of road conditions and
weather conditions.
Network sharing of files, music, videos like a wirelessLAN and much more.
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CONCEPT OF INTER VEHICLE
COMMUNICATION
Concept of inter-vehicle communications
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THE CONCEPT
Concept of inter-vehicle communications
achieved by adaptive mobile ad-hoc networks.
Cluster preferably consists of vehicles with the
same intention. Participants within a cluster should able to
communicate with each other.
One of the participants serves as the master
or router.
Substantial reduction of the transmission of
control data is achieved in the system.
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A comprehensive IVC channel
Model Dynamic Road Traffic Modelling.
Modelling Of The Vehicle's Vicinity.
Modelling of the Road Lane.
Modelling of the Road Surrounding.
Wave Propagation Modelling
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DYNAMIC ROAD TRAFFIC
MODELLING
Two snapshots of a traffic simulation
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Dynamic Modelling
Able to generate realistic time series of the
simulation scenario.
Takes into account the individual driving
behaviour. Each single vehicle gets a statistically generated
set of intrinsic parameters.
The vehicle interacts with external influence
factors.
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MODELLING OF THE VEHICLE'S
VICINITY
Includes the moving vehicles, the lane and the
environment adjacent to the lane.
Stochastic modelling of the environment consist
of the subsections-
Modelling of the Road Lane.
Modelling of the Road Surrounding.
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MODELLING OF THE WAVE
PROPAGATION
Ray-optical methods are used for the wave
propagation modelling.
Main problem with ray optics-
determination of the different propagation
paths.
For the initial calculations-
only single and
multiple reflections are taken into account.
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Ray Optic Modelling
Reflection paths up to the fourth order
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PROPERTIES OF V2V CHANNEL
BEING MODELLED
It should have a frequency range around 5.9 GHz
(Bandwidth of 5 to 10 MHz).
Effects of multipath scattering and fading have to
be taken into consideration.
As the wavelength is lower compared to mostcommunications, the problem of Doppler Shift
will have to be considered.
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STAGES INVOLVED IN
MODELLING
Modelling of Non Stationary CIR, i.e. Channel
Impulse Response
This is achieved through Tapped Delay Line
Filter Modelling
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Channel Impulse Response V/s Time
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Non Stationary CIR
The channel is modelled as a time varying linear filter of
impulse response given by
e(a complex function)
z(t) a persistence process used to account for thefinite lifetime of the propagation paths.
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TAPPED DELAY LINE MODEL
FOR A WIRELESS CHANNEL
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CONCLUSION
A new IVC channel model is presentedwhich is based on wave propagation
modelling in realistic traffic scenarios.
Also the mathematical model of thechannel starting from a time varying
linear filter all the way to the tap design
using Maximum likelihood modelling ispresented.
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References
D. W. Matolak, I. Sen, and W. Xiong, ChannelModeling for V2V Communications, (invitedpaper) Proc.2nd Intl. Wksp. Vehicle-to-VehicleCommunications 2006, San Jose, CA, 21 July
2006. Konchady Gautam Shenoy Channel Modelling in
Vehicle to Vehicle Networks.
Jurgen Maurer, Werner Sorgel and Werner
Wiesbeck Ray-tracing For Vehicle-to-vehicleCommunications.
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THANK YOU