Gi - Fi
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Joined: Feb 2011
14-02-2011, 03:38 PM
Gi-Fi will helps to push wireless communications to faster drive. For many years cables ruled the world. Optical fibers played a dominant role for its higher bit rates and faster transmission. But the installation of cables caused a greater difficulty and thus led to wireless access. The foremost of this is Bluetooth which can cover 9-10mts. Wi-Fi followed it having coverage area of 91mts.However, the standard’s original limitations for data exchange rate and range, number of channels, high cost of the infrastructure have not yet made it possible for Wi-Fi to become a total threat to cellular networks on the one hand, and hard-wire networks, on the other. But the mans continuous quest for even better technology despite the substantial advantages of present technologies led to the introduction of new, more up-to-date standards for data exchange rate i.e., Gi-Fi. Wi-Fi (ieee-802.11b) and WiMax (ieee-802.16e) have captured our attention. As there is no recent developments which transfer data at faster rate as video information transfer taking lot of time. This leads to introduction of Gi-Fi technology .it offers some advantages over Wi-Fi, a similar wireless technology, in that it offers faster information rate in Gbps ,less power consumption and low cost for short range transmissions. Gi-Fi or Gigabit Wireless is the world’s first transceiver integrated on a single chip that operates at 60GHz on the CMOS process. It will allow wireless transfer of audio and video data up to 5 gigabits per second, ten times the current maximum wireless transfer rate, at one-tenth of the cost, usually within a range of 10 meters. It utilizes a 5mm square chip and a 1mm wide antenna burning less than 2 watts of power to transmit data wirelessly over short distances, much like Bluetooth.
The development will enable the truly wireless office and home of the future. As the integrated transceiver is extremely small, it can be embedded into devices. The breakthrough will mean the networking of office and home equipment without wires will finally become a reality.
1.3 Organization of chapters
Chapters are organized as follows:
Chapter 1 : describes the introduction part of Gi-Fi technology. Chapter 2 describes the reason for pushing into Gi-Fi technology and currently using technologies i.e. Wi-Fi and Bluetooth. Chapter 3 describes about the next generation wireless technology, Gi-Fi. This chapter also includes the fundamental technologies in 802.15.3c and working in Gi-Fi. Chapter 4 describes the usage of ultra wide band frequency (UWB).Chapter 5 describes features of Gi-Fi. Chapter 6 describes the advantages of Gi-Fi. Chapter 7 describes and shows Gi-Fi access devices. Chapter 8 describes the applications of Gi-Fi. Chapter 9 describes the future scope and conclusion
WHY Gi-Fi ?
The reason for pushing into Gi-Fi technology is because of slow rate, high power consumption, low range of frequency operations of earlier technologies i.e. Bluetooth and Wi-Fi.
2.1 CURRENTLY USING TECHNOLOGIES
Bluetooth is an open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Created by telecoms vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization. Today Bluetooth is managed by the Bluetooth Special Interest Group. Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 bands (1 MHz each) in the range 2402-2480 MHz. This is in the globally unlicensed Industrial, Scientific and Medical (ISM) 2.4 GHz short-range radio frequency band.
Wi-Fi technology builds on IEEE 802.11 standards. Wi-Fi allows the deployment of local area networks (LANs) without wires for client devices, typically reducing the costs of network deployment and expansion. Spaces where cables cannot be run, such as outdoor areas and historical buildings, can host wireless LANs. As of 2010 manufacturers are building wireless network adapters into most laptops. The price of chipsets for Wi-Fi continues to drop, making it an economical networking option included in even more devices. Wi-Fi has become widespread in corporate infrastructures. Different competitive brands of access points and client network-interfaces can inter-operate at a basic level of service. Products designated as "Wi-Fi Certified" by the Wi-Fi Alliance are backwards compatible. "Wi-Fi" designates a globally operative set of standards: unlike mobile phones, any standard Wi-Fi device will work anywhere in the world.
2.1.3 Bluetooth Vs. Wi-Fi
Bluetooth and Wi-Fi are different standards for wireless communication.
2.1.4 Applications of Bluetooth vs. Wi-Fi
Bluetooth technology is useful when transferring information between two or more devices that are near each other when speed is not an issue, such as telephones, printers, modems and headsets. It is best suited to low-bandwidth applications like transferring sound data with telephones (i.e. with a Bluetooth headset) or byte data with hand-held computers (transferring files). Wi-Fi is better suited for operating full-scale networks because it enables a faster connection, better range from the base station, and better security than Bluetooth.
2.1.5 Disadvantages of Bluetooth and Wi-Fi
From above table we can conclude that the bit rates of Bluetooth is 800Kbps and Wi-Fi has 11Mbps.Both are having power consumptions 5mw and 10mw .And lower frequency of operation 2.4GHz.For transferring large amount of videos ,audios, data files take hours of time. So to have higher data transfer rate at lower power consumption we move onto Gi-Fi technology.
WHAT IS Gi-Fi ?
Gi-Fi or gigabit wireless is the world’s first transceiver integrated on a single chip that operates at 60GHz on the CMOS process. It will allow wireless transfer of audio and video data at up to 5 gigabits per second, ten times the current maximum wireless transfer rate, at one-tenth the cost. NICTA researchers have chosen to develop this technology in the 57-64GHz unlicensed frequency band as the millimeter-wave range of the spectrum makes possible high component on-chip integration as well as allowing for the integration of very small high gain arrays. The available 7GHz of spectrum results in very high data rates, up to 5 gigabits per second to users within an indoor environment, usually within a range of 10 meters. It satisfies the standards of IEEE 802.15.3C.
The Gi-Fi integrated wireless transceiver chip developed at the National ICT Research Centre, Australia
A new silicon chip developed in Melbourne is predicted to revolutionize the way household gadgets like televisions, phones and DVD players talk to each other. The tiny five-millimeter-a-side chip can transmit data through a wireless connection at a breakthrough five gigabits per second over distances of up to 10 meters. An entire high-definition movie from a video shop kiosk could be transmitted to a mobile phone in a few seconds, and the phone could then upload the movie to a home computer or screen at the same speed. The "Gi-Fi" was unveiled today at the Melbourne University-based laboratories of NICTA, the national information and communications technology research centre.
Hotly contested area
Short-range wireless technology is a hotly contested area, with research teams around the world racing to be the first to launch such a product.
Professor Skafiadas said his team is the first to demonstrate a working transceiver-on-a-chip that uses CMOS (complementary metal-oxide-semiconductor) technology - the cheap, ubiquitous technique that prints silicon chips.
This means his team is head and shoulders in front of the competition in terms of price and power demand. His chip uses only a tiny one-millimeter-wide antenna and less than two watts of power, and would cost less than $10 to manufacture.
It uses the 60GHz "millimeter wave" spectrum to transmit the data, which gives it an advantage over Wi-Fi (wireless internet). Wi-Fi's part of the spectrum is increasingly crowded, sharing the waves with devices such as cordless phones, which leads to interference and slower speeds. But the millimeter wave spectrum (30 to 300 GHz) is almost unoccupied, and the new chip is potentially hundreds of times faster than the average home Wi-Fi unit. However, Wi-Fi still benefits from being able to provide wireless coverage over a greater distance.
Victoria's minister for information and communication technology, Theo Theophanous, said it showed Victoria was at the cutting edge of IT innovation.
He praised the 27-member team which worked on the development of the chip. The high-powered team included 10 PhDs students from the University of Melbourne and collaborated with companies such as computer giant IBM during the research.
3.1 FUNDAMENTAL TECHNOLOGIES IN 802.15.3C
This mmWave WPAN will operate in the new and clear band including 57-64 GHz unlicensed band defined by FCC 47 CFR 15.255. The millimeter-wave WPAN will allow high coexistence (close physical spacing) with all other microwave systems in the 802.15 family of WPANs.
3.2 WORKING IN GI-FI
Here we will use time division duplex for both transmission and receiving. we will data files are up converted from IF range to RF60Ghz range by using 2 mixers. we will fed this to an power amplifier, which feeds millimeter wave antenna.
The incoming RF signal is first down converted to an IF signal centered at 5 GHz and then to normal data ranges, here we will use heterodyne principle for this process to avoid leakages due to direct conversion due to availability of 7Ghz spectrum the total data will be will be transferred within seconds.
3.2.1 Time-division duplex
Time-Division Duplex (TDD) is the application of time-division multiplexing to separate outward and return signals. It emulates full duplex communication over a half duplex communication link. Time division duplex has a strong advantage in the case where the asymmetry of the uplink and downlink data speed is variable. As uplink traffic increases, more channel capacity can dynamically be allocated to that, and as it shrinks it can be taken away. For radio systems that aren't moving quickly, another advantage is that the uplink and downlink radio
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Joined: Jul 2011
18-01-2012, 09:21 PM
can any body say that from which journal or magazines this GI FI is published or its reviews plz help me ....
Joined: Jul 2011
19-01-2012, 11:09 AM
to get information about the topic Gi - Fi full report refer the link bellow
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Joined: Jun 2012
05-07-2012, 09:08 PM
Will u plz send me report on Gi-Fi....i want to know more about Gi-Fi..........
Joined: Apr 2012
06-07-2012, 09:32 AM
to get information about the topic "Gi - Fi" full report refer the link bellow
Joined: Apr 2012
07-07-2012, 09:35 AM
Gi-Fi - NEXT GENERATION WIRELESS TECHNOLOGY
M Gi-Fi.ppt (Size: 1.47 MB / Downloads: 77)
Introduction To Gi-Fi :
Gi-Fi or Gigabit Wireless is the world's first transceiver integrated on a single chip that operates at 60GHz on the CMOS process.
Gi-Fi will allow wireless transfer of audio and video data up to 5 gigabits per second.
Gi-Fi is ten times the current maximum wireless transfer rate usually within a range of 10 meters.
Why Gi-Fi ?
The reason for pushing into Gi-Fi technology is because of
high power consumption,
low range of frequency operations
of earlier technologies i.e.,Bluetooth and Wi-Fi.
Disadvantages of Bluetooth & Wi-Fi
The bit rates of Bluetooth is 800Kbps and Wi-Fi has 11Mbps
Both are having power consumptions 5mw and 10mw
The lower frequency of operation 2.4GHz.For transferring large amount of videos, audios, data files take hours of time.
Architecture of Gi-Fi :
The core components of a GI-FI system is the subscriber station which available to several access points .
It supports standard of IEEE 802.15.3C
The wirelessspan is computer network used for communication among computer devices (including telephones and personal digital assistants) close to one person
An 802.15.3c based system often uses small antenna at the subscriber station. The antenna is mounted on the roof. It supports line of sight operation.
FEATURES OF GI-FI :
High speed of data transfer
Low power consumption
TECHNOLOGY CONSIDERATIONS :
The Gi-Fi integrated transceiver chip is may be launched by starting of next year by NICTA,Australia will be first .
Due to less cost of chip so many companies are forward to launch with lower cost. The potential of mw-WPAN for ultra fast data exchange has prompted companies like Intel, LG, Matsushita (Panasonic), NEC, Samsung, SiBEAM, Sony and Toshiba to form WirelessHD, an industry-led effort to define a specification for the next generation consumer electronics products.
Specifically, WirelessHD has a stated goal of enabling wireless connectivity for streaming high- definition content between source devices and high-definition displays.
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Joined: Sep 2012
14-09-2012, 10:30 PM
hey,PLEASE anyone post the IEEE paper on GI-FI
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