Download - A seminar on ultra wide band
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A Seminar On
Ultra Wide Band
(UWB)
Presented By:
Ghanshyam Yadav
CSE 3rd Year
Roll no: 1204210022
MMMUT GKP
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Contents
What is UWB?
Principles of UWB
How it work?
Why UWB?
Application
Future Scope
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Definition – What is UWB?
Ultra Wide Band is communication technology used
in wireless networking to achieve high Bandwidth
connection with low power spectral density.
UWB is a form of extremely wide spread spectrum
where RF energy is spread over gigahertz of
spectrum
• Wider than any narrowband system by orders of
magnitude
• Power seen by a narrowband system is a fraction
of the total UWB power
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FCC DefinitionFractional Bandwidth > 20% of fc
𝐵𝑓 = 2𝑓𝐻 − 𝑓𝐿𝑓𝐻 + 𝑓𝐿
> 0.2
fH : higher 10dB down point
fL : lower 10db down point
fc : central frequency
Bandwidth > 500 MHz
Example:
fL=1GHz and fH=3GHz → FB = 1
GHz
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Principles of UWB
Time Domain
Extremely short pulses
Very low duty cycle
Frequency Domain
Ultra wide spectrum
Low power spectral
density
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How UWB works
• Generation of extremely short digital pulses in the
subnanosecond range.
• Uses and extremely wide band of RF spectrum to
transmit data
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Effectiveness of Ultra Wide
Band• Shannon showed that the system capacity, C, of a channel perturbed by AWGN ---
Where:C = Max Channel Capacity (bits/sec)B = Channel Bandwidth (Hz)S = Signal Power (watts)N = Noise Power (watts)
Capacity per channel (bps) BCapacity per channel (bps) log(1+S/N)
1. Increase B2. Increase S/N, use higher order modulation
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ThroughputLow Power UWB Comparable to High Power Wireless Systems
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Why UWB - Advantages
Spectrum reuse
Use frequencies from 3.1
to 10.6 GHz
coexist with other users
(sharing spectrum)
High data rate in short range,
high throughput
500 Mbps at 10 feet
Low power
Baseband modulation (no
carrier)
Long battery life of portable
devices
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Comparison with other technologies
• Faster than Bluetooth, Wi Fi
• Data rate of 450Mbps instead of 1Mbps
• Complementary to existing radio technologies like 802.11
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UWB Applications
• Replacing IEEE 1394 cables with wireless
connectivity
• No. 1 High quality wireless video
• Accurate Ranging information
• Radar and Imaging
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Future ScopeWIRELESS USB
• The next step for USB technology is wireless USB.• WUSB will be high speed wireless interconnect technology to take advantage
of USB
• With WUSB, a user can bring a hard disk in proximity to a PC, laptop and, once authentication and authorization are complete, files can be transferred onto the PC.
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• Well suited for high speed, short range WPAN.
• Supports multimedia data rates, and offers inherent data security.
• There's a possibility that UWB will become the "next best" technology for all types of wireless networks, including wireless LANs.
CONCLUSION
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THANK YOU
Queries ??