Gi Fi Technology

  Gi fi Technology

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. 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 5gigabits 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 2watts of power to transmit data wirelessly over short distances, much like Bluetooth.

Wi-Fi (IEEE-802.11b) and Wi-Max (IEEE-802.16e) have captured our attention, as there are no recent developments in the above technologies which cannot transfer data and video information at a faster rate and led to the introduction of Gi-fi technology. It offers some advantages over Wi-Fi, a similar wireless technology, that 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 in which a small antenna used and both transmitter- receiver are integrated on a single chip which is fabricated using the complementary metal oxide semiconductor (CMOS) process.   Because of Gi-Fi   transfer of large videos, files can be done within seconds.

Researchers of Melbourne University has come up with a wireless technology which promises high speed short range data transfers with a speed of  up to  5Gbps within a radius of 10 meters. The new wireless technology is named as Gi-Fi and operates on the 60GHz frequency band, which is currently mostly unused. The Gi-Fi Chip developed by the Australian researcher’s measures 5mm square and is manufactured using existing complementary metal-oxide-semiconductor (CMOS) technology, the same system that is currently used to print silicon chips.

The best part about this new technology is its cost effectiveness and power consumption, it consumes only 2 watts of power for its operation with antenna (1mm) included and the development of Gi-Fi chip costs approximately $10 to manufacture.

In theory this technology would transfers GB’s of your favorite high definition movies in seconds. So Gi-Fi can be considered as a challenger to Bluetooth rather than Wi-Fi and could find applications ranging from new mobile phones to consumer electronics.

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. 

 

WORKING PRINCIPLE USED IN GI-FI

In this we will use time division duplex for both transmission and receiving. Here data files are up converted from IF range to RF60Ghz range by using 2 mixers and 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 hetero dyne construction for this process to avoid leakages due to direct conversion and due to availability of 7Ghz spectrum the total data will be will be transferred within seconds.

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 up-link and down-link data speed is variable. As up-link traffic increases, more channel capacity can dynamically be allocated to that, and as it shrinks it can be taken away.

 

 FEATURES OF GI-FI

The features of Gi-Fi have been standardized with many objectives like

·        High speed data transfer:

 The main invention of Gi-Fi  to provide higher  bit rate .As the name itself indicates that data transfer rate is in  Giga bits per second. Speed of Gi-Fi is 5Gbps, which is 10 times the present data transfer. Because of wider availability of continuous 7 GHz spectrum it results in high data rates.

·        Low Power Consumption:

Though large amount of information transfer takes place it utilizes Milli watts of power only. It consumes only 2mwatt power  for data transfer of gigabits of information, whereas in present technologies it takes 10 m watt power  which is very high.

·         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.

·        Cost-effective:

 Gi-Fi is based on an open, international standard. Mass adoption of the standard, and the use of low-cost, mass-produced chip sets, will drive costs down dramatically, and the resultant  integrated wireless  transceiver 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.

FUTURE SCOPE

 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. The Gi-Fi integrated transceiver chip may be launched by the starting of next year by NICTA. Due to the less cost of chip so many companies are coming forward to launch the chip. The potential of mm-wave range for ultra fast data exchange has prompted many companies like Intel, LG, Panasonic, Samsung, Sony& Toshiba to form wireless HD. Specifically wireless HD has a stated goal of enabling wireless connectivity for streaming high definition content between source devices and high definition devices

CONCLUSION

 Within five years, we expect Gi-Fi to be the dominant technology for wireless networking. By that time it will be to provide services with low-cost, high broadband access, and with very high speed large files swapped within seconds which will develop wireless home and office of future. If the success of Wi-Fi and the imminent wide usage of WiMAX is any indication, Gi-Fi potentially can bring wireless broadband to the enterprise in an entirely new way.