30-03-2010, 11:30 PM
UWB (Ultra Wideband) Communication System
Presented By:
PREETHI R
Outline
UWB invented
Introduction to ULTRA WIDE BAND.
What is UltraWideBand
Different types of UWB devices.
Block Diagram of TM-UWB Transceiver.
Advantages-Disadvantages Of UWB.
What are some of the applications for UWB technology
Different from others.
UWB
When was UWB invented and by whom
In the late 1960â„¢s
Dr. Gerald F. Ross
Dr. Gerry
Introduction to ULTRA WIDE BAND the Next-Generation Wireless Connection
Overview: Transitioning to the Real World
Digital Home Requirements
Why is UWB considered by many to be the next "big thing" in the wireless space It allows for high data throughput with low power consumption for distances of less than 10 meters, or about 30 feet, which is very applicable to the digital home requirements. The fastest data rate publicly shown over UWB is now an impressive 252 Mbps, and a rate of 480 Mbps is expected to be shown in the not-too-distant future.
Wider Applications of UWB
Some of the more notable applications that would operate on top of the common UWB platform would be wireless universal serial bus (WUSB), IEEE 1394, the next generation of Bluetooth, and Universal Plug and Play (UPnP). You can see a diagram of this vision in Figure 1.
What is IEEE 802.15.3 and 802.15.3a
802.15.3 is the IEEE standard for high data rate WPAN designed to provide Quality of Service (QoS). The original standard uses a "traditional" carrier-based 2.4 GHz radio as the physical layer (PHY).
A follow-on standard, 802.15.3a, is still in the formative stages. It will define an alternative PHY, current candidate proposals are based on UWB, that will provide in excess of 110 Mbps at a 10m distance and 480 Mbps at 2m.
What is UltraWideBand
The term "ultra-wideband," comes from the fundamental physics benefits of radios designed to use coherent wide-relative-bandwidth propagation.
UWB is defined as any radio technology having a spectrum that occupies a bandwidth greater than 20 percent of the center frequency, or a bandwidth of at least 500 MHz
Federal Communications Commission
The definition from FCC:
Why is UWB attractive
Simplicity: itâ„¢s essentially a base-band system (carrier-free), for which the analog front-end complexity is far less than for a traditional sinusoidal radio.
High spatial capacity (bps/m2)
Low power
(Bluetooth:1Mbps,10m,1mW UWB: 1Mbps,10m,10)
4. Low cost, simple implementation
5. Immune to multipath fading as well as multi-user interference
Do we really need another wireless technology
unwired.
Plus it's low power.
The current technologies, like WLAN just aren't fast enough.
Unlike conventional radio systems, which operate within a relatively narrow bandwidth, ultra-wideband operates across a wide range of frequency spectrum by transmitting a series of extremely narrow (10 - 1000ps) and low power pulses.
Information Modulation
Pulse length <1ns; Energy concentrated in 2-6GHz band; Power < 10uW
Pulse Position Modulation (PPM)
Pulse Amplitude Modulation (PAM)
On-Off Keying (OOK)
Bi-Phase Modulation (BPSK)
Different types of UWB devices
There are a number of different types of UWB devices, based broadly on the application to which they are likely to be put. In this consultation document, we have grouped the devices into two categories:
Generic devices that might be used for a wide range of applications such as personal area networks (PANs).
Specific devices used for ground probing radar, 'through the wall' imaging and a number of other specialist applications.
Two main data modulation schemes used for UWB systems
Time hopping pulse position modulation (TH-PPM)
Direct spread code division multiple access (DS-CDMA)
Block Diagram of TM-UWB Transceiver
A traditional UWB transmitter works by sending billions of pulses across a very wide spectrum of frequency several GHz in bandwidth.
The corresponding receiver then translates the pulses into data by listening for a familiar pulse sequence sent by the transmitter.
Multipath and Propagation
Modern UWB systems
Frequency Division Multiplexing (OFDM) Orthogonal
MultiBand OFDM (M-OFDM)
In the MultiBand OFDM approach, the available spectrum of 7.5 GHz is divided into several 528-MHz bands.
CONT¦.
The band plan for the MBOA proposal has five logical channels.
Channel 1, mandatory
channels (2“5) , optional
Advantages Of UWB
Lower power.
Low probability of detection (LPD).
Low probability of jamming (LPJ).
Ability to penetrate wall.
Higher immunity to multi-path fading effects.
Availability of precise location information.
Low interference to existing radio services.
High processing gains.
Disadvantages of UWB
Under current FCC regulations, it is limited to 10, or a few 10s of meters, depending on the desired data rate.
What are some of the applications for UWB technology
There are numerous application areas in which UWB technology can provide significant performance and cost advantages.
CONT¦.applications for UWB technology
Full Duplex UWB Handheld Transceivers.
CONT¦.applications for UWB technology
UWB Wireless Intercom Communications System (WICS).
CONT¦.applications for UWB technology
UWB License Plate (Tag + Collision Avoidance Radar).
CONT¦.applications for UWB technology
Military/Government:
Tactical Handheld & Network Radios
Groundwave Communications
Obstacle Avoidance Radar
Tags
Intrusion Detection Radars
Precision Geolocation Systems
UAV/UGV Datalinks
Proximity Fuzes
Wireless Intercom Systems
CONT¦.applications for UWB technology
Commercial:
High Speed (20+ Mb/s) LAN/WANs
Altimeter/Obstacle Avoidance Radars
(commercial aviation)
Collision Avoidance Sensors
Tags (Intelligent Transportation
Systems, Electronic Signs, Smart
Appliances)
Intrusion Detection Radars
Precision Geolocation Systems
Industrial RF Monitoring Systems
How different Ultra-wideband from other WLAN/WPAN technologies
UWB is the only technology today that can achieve data rates significantly in excess of 54Mbps at power consumption levels and price points amenable to battery-powered consumer appliances, i.e. digital cameras, flat panel displays, etc. In addition, UWB presents some astonishing properties in terms of coexistence, multipath immunity for indoor environments, and security.
What about Bluetooth
Bluetooth, like UWB is a wireless personal area networking technology. The data rates delivered are significantly different and therefore the application spaces addressed by each technology are different. Like other application-specific technologies, it is likely that UWB and Bluetooth could both be integrated into end-devices to serve these different application spaces
Product
UWB “ A Broader Outlook
Challenges:
Noise and interference due to other signals in the same bandwidth
Efficient pulse generation
Pulse reception (with dispersion)
Wideband antenna design
Development of efficient coding techniques in order to control spectral characteristics
of the signal, allowing optimum usage of bandwidth as per FCC regulations
Synchronization (esp. for the time hopping case)
FCC compliance
Work done so far
Investigation into the nature of ultra wideband antenna
Analytical studies on UWB propagation, channel modeling, BER studies
Implementation of simple UWB transceiver prototypes
Development of localizers for positioning systems
Presented By:
PREETHI R
Outline
UWB invented
Introduction to ULTRA WIDE BAND.
What is UltraWideBand
Different types of UWB devices.
Block Diagram of TM-UWB Transceiver.
Advantages-Disadvantages Of UWB.
What are some of the applications for UWB technology
Different from others.
UWB
When was UWB invented and by whom
In the late 1960â„¢s
Dr. Gerald F. Ross
Dr. Gerry
Introduction to ULTRA WIDE BAND the Next-Generation Wireless Connection
Overview: Transitioning to the Real World
Digital Home Requirements
Why is UWB considered by many to be the next "big thing" in the wireless space It allows for high data throughput with low power consumption for distances of less than 10 meters, or about 30 feet, which is very applicable to the digital home requirements. The fastest data rate publicly shown over UWB is now an impressive 252 Mbps, and a rate of 480 Mbps is expected to be shown in the not-too-distant future.
Wider Applications of UWB
Some of the more notable applications that would operate on top of the common UWB platform would be wireless universal serial bus (WUSB), IEEE 1394, the next generation of Bluetooth, and Universal Plug and Play (UPnP). You can see a diagram of this vision in Figure 1.
What is IEEE 802.15.3 and 802.15.3a
802.15.3 is the IEEE standard for high data rate WPAN designed to provide Quality of Service (QoS). The original standard uses a "traditional" carrier-based 2.4 GHz radio as the physical layer (PHY).
A follow-on standard, 802.15.3a, is still in the formative stages. It will define an alternative PHY, current candidate proposals are based on UWB, that will provide in excess of 110 Mbps at a 10m distance and 480 Mbps at 2m.
What is UltraWideBand
The term "ultra-wideband," comes from the fundamental physics benefits of radios designed to use coherent wide-relative-bandwidth propagation.
UWB is defined as any radio technology having a spectrum that occupies a bandwidth greater than 20 percent of the center frequency, or a bandwidth of at least 500 MHz
Federal Communications Commission
The definition from FCC:
Why is UWB attractive
Simplicity: itâ„¢s essentially a base-band system (carrier-free), for which the analog front-end complexity is far less than for a traditional sinusoidal radio.
High spatial capacity (bps/m2)
Low power
(Bluetooth:1Mbps,10m,1mW UWB: 1Mbps,10m,10)
4. Low cost, simple implementation
5. Immune to multipath fading as well as multi-user interference
Do we really need another wireless technology
unwired.
Plus it's low power.
The current technologies, like WLAN just aren't fast enough.
Unlike conventional radio systems, which operate within a relatively narrow bandwidth, ultra-wideband operates across a wide range of frequency spectrum by transmitting a series of extremely narrow (10 - 1000ps) and low power pulses.
Information Modulation
Pulse length <1ns; Energy concentrated in 2-6GHz band; Power < 10uW
Pulse Position Modulation (PPM)
Pulse Amplitude Modulation (PAM)
On-Off Keying (OOK)
Bi-Phase Modulation (BPSK)
Different types of UWB devices
There are a number of different types of UWB devices, based broadly on the application to which they are likely to be put. In this consultation document, we have grouped the devices into two categories:
Generic devices that might be used for a wide range of applications such as personal area networks (PANs).
Specific devices used for ground probing radar, 'through the wall' imaging and a number of other specialist applications.
Two main data modulation schemes used for UWB systems
Time hopping pulse position modulation (TH-PPM)
Direct spread code division multiple access (DS-CDMA)
Block Diagram of TM-UWB Transceiver
A traditional UWB transmitter works by sending billions of pulses across a very wide spectrum of frequency several GHz in bandwidth.
The corresponding receiver then translates the pulses into data by listening for a familiar pulse sequence sent by the transmitter.
Multipath and Propagation
Modern UWB systems
Frequency Division Multiplexing (OFDM) Orthogonal
MultiBand OFDM (M-OFDM)
In the MultiBand OFDM approach, the available spectrum of 7.5 GHz is divided into several 528-MHz bands.
CONT¦.
The band plan for the MBOA proposal has five logical channels.
Channel 1, mandatory
channels (2“5) , optional
Advantages Of UWB
Lower power.
Low probability of detection (LPD).
Low probability of jamming (LPJ).
Ability to penetrate wall.
Higher immunity to multi-path fading effects.
Availability of precise location information.
Low interference to existing radio services.
High processing gains.
Disadvantages of UWB
Under current FCC regulations, it is limited to 10, or a few 10s of meters, depending on the desired data rate.
What are some of the applications for UWB technology
There are numerous application areas in which UWB technology can provide significant performance and cost advantages.
CONT¦.applications for UWB technology
Full Duplex UWB Handheld Transceivers.
CONT¦.applications for UWB technology
UWB Wireless Intercom Communications System (WICS).
CONT¦.applications for UWB technology
UWB License Plate (Tag + Collision Avoidance Radar).
CONT¦.applications for UWB technology
Military/Government:
Tactical Handheld & Network Radios
Groundwave Communications
Obstacle Avoidance Radar
Tags
Intrusion Detection Radars
Precision Geolocation Systems
UAV/UGV Datalinks
Proximity Fuzes
Wireless Intercom Systems
CONT¦.applications for UWB technology
Commercial:
High Speed (20+ Mb/s) LAN/WANs
Altimeter/Obstacle Avoidance Radars
(commercial aviation)
Collision Avoidance Sensors
Tags (Intelligent Transportation
Systems, Electronic Signs, Smart
Appliances)
Intrusion Detection Radars
Precision Geolocation Systems
Industrial RF Monitoring Systems
How different Ultra-wideband from other WLAN/WPAN technologies
UWB is the only technology today that can achieve data rates significantly in excess of 54Mbps at power consumption levels and price points amenable to battery-powered consumer appliances, i.e. digital cameras, flat panel displays, etc. In addition, UWB presents some astonishing properties in terms of coexistence, multipath immunity for indoor environments, and security.
What about Bluetooth
Bluetooth, like UWB is a wireless personal area networking technology. The data rates delivered are significantly different and therefore the application spaces addressed by each technology are different. Like other application-specific technologies, it is likely that UWB and Bluetooth could both be integrated into end-devices to serve these different application spaces
Product
UWB “ A Broader Outlook
Challenges:
Noise and interference due to other signals in the same bandwidth
Efficient pulse generation
Pulse reception (with dispersion)
Wideband antenna design
Development of efficient coding techniques in order to control spectral characteristics
of the signal, allowing optimum usage of bandwidth as per FCC regulations
Synchronization (esp. for the time hopping case)
FCC compliance
Work done so far
Investigation into the nature of ultra wideband antenna
Analytical studies on UWB propagation, channel modeling, BER studies
Implementation of simple UWB transceiver prototypes
Development of localizers for positioning systems
