26-06-2012, 05:35 PM
Introduction of Gi-Fi Technology
[attachment=25666]
INTRODUCTION
Wi-Fi (ieee-802.11b) and Wi-Max (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 which is developed on a integrated wireless trnsceiverchip.In which a small anteena used and both transmitter- receiver 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 will be with in seconds.
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 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 with in seconds.
WHY 60 GHZ..?
Here we will use millimeter wave antenna which will operate at 60 GHz frequency which is unlined band .Because of this band we are achieving high data rates energy propagation in the 60 GHz band has unique characteristics that make possible many other benefits such as excellent immunity to co-channel interference, high security, and frequency re-use.
Point-to-point wireless systems operating at 60 GHz have been used for many years for satellite-to-satellite communications. This is because of high oxygen absorption at 60 GHz (10-15 dB/Km). This absorption attenuates 60 GHz signals over distance, so that signals cannot travel far beyond their intended recipient. For this reason, 60GHz is an excellent choice for covert communications.
FEATURES OF Gi-Fi:
The Gi-Fi standard has been developed with many objectives in mind. These are summarized below:
High speed of data transfer:
The main invention of Gi-Fi to provide higher bit rate .As the name it self 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.
Low Power Consumption:
As the large amount of information transfer it utilisesmili watts of power only. It consumes only 2 mwatt power for data transfer of gigabits of information. where as in present technologies it takes 10 mwatt 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 chipsets, will drive costs down dramatically, and the resultant integrated wireless transreceiver 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.
[attachment=25666]
INTRODUCTION
Wi-Fi (ieee-802.11b) and Wi-Max (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 which is developed on a integrated wireless trnsceiverchip.In which a small anteena used and both transmitter- receiver 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 will be with in seconds.
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 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 with in seconds.
WHY 60 GHZ..?
Here we will use millimeter wave antenna which will operate at 60 GHz frequency which is unlined band .Because of this band we are achieving high data rates energy propagation in the 60 GHz band has unique characteristics that make possible many other benefits such as excellent immunity to co-channel interference, high security, and frequency re-use.
Point-to-point wireless systems operating at 60 GHz have been used for many years for satellite-to-satellite communications. This is because of high oxygen absorption at 60 GHz (10-15 dB/Km). This absorption attenuates 60 GHz signals over distance, so that signals cannot travel far beyond their intended recipient. For this reason, 60GHz is an excellent choice for covert communications.
FEATURES OF Gi-Fi:
The Gi-Fi standard has been developed with many objectives in mind. These are summarized below:
High speed of data transfer:
The main invention of Gi-Fi to provide higher bit rate .As the name it self 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.
Low Power Consumption:
As the large amount of information transfer it utilisesmili watts of power only. It consumes only 2 mwatt power for data transfer of gigabits of information. where as in present technologies it takes 10 mwatt 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 chipsets, will drive costs down dramatically, and the resultant integrated wireless transreceiver 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.