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 (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.
