ABSTRACT
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.
The new technology is predicted to revolutionize the way household gadgets talk to each other.
It was developed by the Melbourne University-based laboratories of NICTA (National ICT Australia Limited), Australia’s Information and Communications Technology Research Centre of Excellence.
Gigabit wireless: The Gi-Fi integrated wireless transceiver chip developed at the National ICT Research Centre, Australia.
Referral
INTRODUCTION
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. No doubt, introduction of Wi-Fi wireless networks has proved a revolutionary solution to “last mile” problem. 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 man’s 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.
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.
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. see the comparisons and features of those two technologies.
Bluetooth Verses Wi-Fi
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 57-64GHzunlicensed 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 metres.It satisfies the standards of IEEE 802.15.3C
FUNDAMENTAL TECHNOLOGIES IN 802.15.3C:
This mm Wave 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.
Working IN gi-fi:
Here we will use time division duplex for both transmission and receiving.wewill 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 construction for this process to avoid leakages due to direct conversion. Due to availability of 7 GHz spectrum the total data will be will be transferred within seconds.
FEATURES OF Gi-Fi:
The Gi-Fi standard has been developed with many objectives in mind. These are summarized below:
1. High speed of data transfer:
The main invention of Gi-Fi to provide higher bit rate .As the name itself indicates data transfer rate is in Giga bits per second. Speed of Gi-Fi is 5 gbps. Which is 10 times the present data transfer. Because of wider availability of continuous 7 GHz spectrum results in high data rates.
2. Low Power Consumption:
As the large amount of information transfer it utilizes mili watts of power only. It consumes only 2 mwatt power for data transfer of gigabits of information. Whereas in present technologies it takes 10 mwatt power. Which is very high.
3. High Security:
Point-to-point wireless systems operating at 60 GHz have been used for many years by the intelligence community for high security communications and by the military for satellite-to satellite communications. The combined effects of O2 absorption and narrow beam spread result in high security and low interference
4. Cost-effective:
Gi-Fi is based on an open, international standard. Mass adoption of the standard, and the use of low-cost, mass-produced chipsets, will drive costs down dramatically, and the resultant integrated wireless trans receiver chip which transfers data at high speed low power at low price $10 only. which is very less As compare to present systems .As go on development the price will be decreased.
Other features:
High level of frequency re-use enabled – communication needs of multiple customers within a small geographic region can be satisfied
It is also highly portable-we can construct where ever we want.
It deploys line of sight operation having only shorter coverage area, it has more flexible architecture.
APPLICATIONS:
There are many usage scenarios that can be addressed by Gi-Fi. The following are some mobility usage applications of Gi-Fi:
Ø In wireless pan networks:
Ø Inter-vehicle communication system:
Ø Huge data file transmission:It will transfer gigabits of information within seconds.
Ø Broadcasting video signal transmission system in sports stadium :
Ø Ad-hoc information distribution with Point-to-Point network extension:
Easy and immediate construction of temporal broadband network such as in exhibition-site for…Advertisement information distribution or Contents downloading service.
Ø mm-Wave video-signals transmission system
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