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Wimax Santosh Kulkarni GIT (E&C) BELGAUM


Contents Introduction Design Working Networks established Applications Limitations Future


Introduction You’ve fallen in love with Wi-Fi—being able to connect wirelessly to the Internet in your home, office, and from thousands of hotspots. Well, hold on to your Internet! Soon, a new wireless wind will be blowing over the landscape. WiMAX transmits broadband Internet connectivity for miles/kilometres, reaching into more of the places where we live, work, and play.


Introduction What is WiMAX? WiMAX combines the familiarity of Wi-Fi with the mobility of cellular that will deliver personal mobile broadband that moves with you. It will let you get connected to the Internet, miles from the nearest


Wimax Wi-Fi hotspot. Soon, Mobile WiMAX will blanket large areas—metropolitan, suburban, or rural—delivering mobile broadband Internet access at speeds similar to existing broadband.


Design Antenna - A metallic device used in the transmission and reception of electromagnetic waves. Base Station : A Wimax base station comprises of internal devices and a Wimax tower.


Design The WiMAX base station is mounted on a tower or tall building to broadcast the wireless signal The subscriber receives the signals on a WiMAX enabled notebook, mobile Internet device (MID), or even a WiMAX modem.


Working When a user send data from a subscriber device to a base station then that base station broadcast the wireless signal into channel which is called uplink and base station transmit the same or another user is called downlink. The Wimax network is just like a cell phone.


MIMO WiMAX MIMO refers to the use of Multiple-input multipleoutputcommunications (MIMO) technology This refers to the technology where there are multiple antennas at the base station and multiple antennas at the mobile device. Typical usage of multiple antenna technology includes cellular phones with two antennas, laptopswith two antennas,as well as CPE devices with multiple sprouting antennas.

Spatial Multiplexing:

Spatial Multiplexing Instead of transmitting the same bit over two antennas, this method transmits one data bit from the first antenna, and another bit from the second antenna simultaneously, per symbol.

Networks around the world:

Networks around the world WiMAX Networks around the World Beginning in 2004 Europe: WiMAX networks have made their presence in Europe since as early as 2004. Norby Telecom and Wi-Manx were one of the first companies in Europe to deploy commercial WiMAX

Networks around the world:

Networks around the world A few years later, the technology spread to the UK. Freedom4 connected over 4,000 Wi-Fi hotspots around the UK and deployed a Mobile WiMAX Network (802.16e) in London. Germany joined the WiMAX ranks in 2005 when Deutsche Breitband Dienste (DBD) set up WiMAX networks in large cities such as Munich under the brand names MAXXonair and DSLonair.

Networks around the world:

Networks around the world Italy was one of the last European nations to join the WiMAX race. China Netcom has provided residential users in the Guangdong province of China with fixed Broadband Wireless Access since 2006. South Korean telecom industries have supplied a huge contribution to the development of Mobile WiMAX (802.16e), which they referred to as WiBro .

Networks around the world:

Networks around the world South America: TelMex, who has deployed a Mobile WiMAX network around the city Brasilia, and Neovia, who has set up a fixed WiMAX network in Sao Paulo, make up the majority of WiMAX networks in Brazil. North America: Mexico acquired its first WiMAX system as early as October of 2005. The Internet Service Provider Axtel was the first to develop a commercialized WiMAX network in the country, which it deployed in Monterrey city.


Applications The bandwidth and range of WiMAX make it suitable for the following potential applications: Providing portable mobile broadband connectivity across cities and countries through a variety of devices. Providing a wireless alternative to cable and DSL for " last mile broadband access.


Applications Providing a source of Internet connectivity as part of a business continuity plan. Providing data, telecommunications (VoIP) and IPTV services ( triple play ). WiMAX is a possible replacement candidate for cellular phone technologies such as GSM and CDMA , or can be used as an overlay to increase capacity.


Applications One specific use of Spatial Multiplexing is to apply it to users who have the best signal quality, so that less time is spent transmitting to them. Users whose signal quality is too low to allow the spatially multiplexed signals to be resolved stay with conventional transmission. This allows an operator to offer higher data rates to some users and/or to serve more users. The WiMAX specification's dynamic negotiation mechanism helps enable this use.


Limitations So far one of the biggest restrictions to the widespread acceptance of WiMAX has been the cost of Wimax CPE (Wimax Receiver). This is not only the cost of Wimax CPE (Wimax Receiver) itself, but also that of installation.


Conclusion Hold on to your Internet! WiMAX will soon be blowing broadband Internet over the landscape, reaching into more of the placeswhere we live, work, and play.


Future WiMAX will do for broadband Internet access what the cell phone did for telephone service—give you access to the Internet while you’re on the move. WiMAX won’t replace Wi-Fi, but rather will fill in between hotspots and extend your Internet access on the go.

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