Published on

Published in: Technology, Business
No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide


  1. 1. CHAPTER 1 INTRODUCTION Wi-Fi (ieee-802.11b) and Wi-Max (ieee-802.16e) have captured our attention .Asthere is no recent developments which transfer data at faster rate. As video informationtransfer taking lot of time. This leads to introduction of Gi-Fi technology .it offers some advantages overWi-Fi, a similar wireless technology, in that it offers faster information rate in Gbps, lesspower consumption and low cost for short range transmissions. Gi-Fi which is developed on a integrated wireless transceiver chip. In which asmall antenna used and both transmitter- receiver integrated on a single chip. Which isfabricated using the complementary metal oxide semiconductor (CMOS)process? Because of Gi-Fi transfer of large videos, files will be within seconds. 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, usuallywithin a range of 10 meters. It utilizes a 5mm square chip and a 1mm wide antennaburning less than 2 watts of power to transmit data wirelessly over short distances, muchlike Bluetooth. 1 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  2. 2. CHAPTER 2 REASON FOR PUSHING INTO GI-FI The reason for pushing into Gi-Fi technology is because of i. Slow rate, ii. high power consumption, iii. low range of frequency operations of earlier technologies i.e. Bluetooth and Wi-Fi. see the comparisons and features of those two technologies 2.1 BLUETOOTH VS WI-FICharacteristic Bluetooth Wi-FiFrequency 2.4GHz 2.4GHzRange 10meters 100metersPrimary application WPAN: cable replacement WLAN: EthernetData transfer rate 800 Kbps 11 MbpsPower consumption Low MediumPrimary devices Notebook computers, Mobile phones, PDAs, consumer desktop computers, electronics serversPrimary users Travelling employees, office and Corporate campus users industrial workersDevelopment start date 1998 1990Specifications authority Bluetooth SIG IEEE, WEGA Table 2.1 Differences of Bluetooth & Wi-Fi 2 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  3. 3. From table2.1.1 we can conclude that the bit rates of Bluetooth is 800Kbps and Wi-Fihas 11Mbps.Both are having power consumptions 5mw and 10mw .And lower frequencyof operation 2.4GHz.For transferring large amount of videos ,audios, data files take hoursof time. So to have higher data transfer rate at lower power consumption wemove onto Gi-Fi technology2.2 WHAT IS Gi-Fi? Gi-Fi or gigabit wireless is the world’s first transceiver integrated on asingle chip that operates at 60GHz on the CMOS .process. It will allow wireless transferof audio and video data at up to 5 gigabits per second, ten times the current maximumwireless transfer rate, at one-tenth the cost. NICTA researchers have chosen to developthis technology in the 57-64GHzunlicensed frequency band as the millimeter-wave rangeof the spectrum makes possible high component on-chip integration as well as allowingfor the integration of very small high gain arrays. The available 7GHz of spectrum resultsin 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 3 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  4. 4. CHAPTER 3 Architecture Of Gi-Fi The core components of a GI-FI system is the subscriber station whichavailable to several access points It supports standard of IEEE 802.15.3C . An802.15.3c based system often uses small antenna at the subscriber station. The antenna ismounted on the roof. It supports line of sight operation Fig 3.1 Gigabit wireless: The Gi-Fi integrated wireless transceiver chip. 4 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  5. 5. 3.1 FUNDAMENTAL TECHNOLOGIES IN 802.15.3C This mm Wave WPAN will operate in the new and clear band including 57-64 GHzunlicensed band defined by FCC 47 CFR 15.255. The millimeter-wave WPAN will allowhigh coexistence (close physical spacing) with all other microwave systems in the 802.15family of WPANs. Fig: 3.2 Graph between data rate & year 5 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  6. 6. Chapter 4 Working Of Gi-FiHere we will use time division duplex for both transmission and receiving. We will datafiles are up converted from IF range to RF60Ghz range by using 2 mixers. We will fedthis 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 .andthen to normal data ranges, here we will use heterodyne construction for this process toavoid leakages due to direct conversion. Due to availability of 7 GHz spectrum the totaldata will be will be transferred within seconds4.1 Factors for Using 60 GHzHere we will use millimeter wave antenna which will operate at 60 GHz frequency whichis unlined band .Because of this band we are achieving high data rates energy propagationin the 60 GHz band has unique characteristics that make possible many other benefitssuch 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 yearsfor satellite-to-satellite communications. This is because of high oxygen absorption at 60GHz (10-15 dB/Km). This absorption attenuates 60 GHz signals over distance, so thatsignals cannot travel far beyond their intended recipient. For this reason, 60GHz is anexcellent choice for covert communications Fig 4.1 Oxygen Attenuation vs. Frequency 6 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  7. 7. CHAPTER 5 FEATURES OF Gi-FiThe Gi-Fi standard has been developed with many objectives in mind. These aresummarized below:1. High speed of data transfer:The main invention of Gi-Fi to provide higher bit rate .As the name itself indicates datatransfer rate is in Giga bits per second. Speed of Gi-Fi is 5 gbps. This is 10 times thepresent data transfer. Because of wider availability of continuous 7 Hz spectrum results inhigh data rates.2. Low Power Consumption:As the large amount of information transfer it utilizes mill watts of power only. Itconsumes only 2 mW power for data transfer of gigabits of information. Where as inpresent technologies it takes 10 mW powers which is very high3. High Security:Point-to-point wireless systems operating at 60 GHz have been used for many years bythe intelligence community for high security communications and by the military forsatellite-to satellite communications. The combined effects of O2 absorption and narrowbeam spread result in high security and low interference4. Cost-effective:Gi-Fi is based on an open, international standard. Mass adoption of the standard, and theuse of low-cost, mass-produced chipsets, will drive costs down dramatically, and theresultant integrated wireless transreceiver chip which transfers data at high speed lowpower at low price $10 only. which is very less As compare to present systems .As go ondevelopment the price will be decreased.Other features:High level of frequency re-use enabled – communication needs of multiple customerswithin a small geographic region can be satisfied It is also highly portable-we canconstruct where ever we want. 7 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  8. 8. CHAPTER 6 Applications Of Gi-FiThere are many usage scenarios that can be addressed by Gi-Fi. The following are somemobility usage applications of Gi-Fi.1. In wireless pan networks Fig 6.1 public area networks 8 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  9. 9. 2. Inter-vehicle communication system Fig 6.2. Inter-vehicle communication3. Broadcasting video signal transmission system in sports stadium Fig 6.3 Broadcasting video signal in sports stadium 9 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  10. 10. 4. mm-Wave video-signals transmission system Fig 6.4 mm-Wave video-signals5. Ad-hoc information distribution with Point-to-Point network extension Fig 6.5 Ad-hoc information Point-to-Point network extension 10 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  11. 11. FUTURE ADVANCEMENT Within five years, we expect Gi-Fi to be the dominant technology for wirelessnetworking. By that time it will be fully mobile, as well as providing low-cost, high speedlarge files swapped within seconds which will develop wireless home and office of future. As the range is limited to shorter distances only we can expect the broad band withsame speed and low power consumption. 11 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING
  12. 12. CONCLUSION If the success of Wi-Fi and the imminent wide usage of Wi-MAX is anyindication, Gi-Fi potentially can bring wireless broadband to the enterprise in an entirelynew way. Gi-Fi will be the dominant technology for wireless networking. In future it will befully mobile, as well as providing low-cost, high speed. 12 V.K.R, V.N.B & A.G.K COLLEGE OF ENGINEERING