Which technology is used in WiMAX?
– IEEE 802.16, WiMAX, Wireless Microwave Access technology is able to provide 4G levels of Broadband Wireless Access for both mobile and fixed applications. WiMAX technology is a wireless broadband communications technology based around the IEE 802.16 standard providing high speed data over a wide area.
What is WiMAX technology and how it works?
WiMax provides wireless broadband access to buildings, wired networks, rural otherwise populated regions. It connects WLAN hotspots toward the Internet and also it provides connectivity of broadband for mobile devices. The expected speed is about 15 Mbps in a 3 km cell coverage region.
Does WiMax use OFDM?
The WiMax (Worldwide Interoperability for Microwave Access) is a technology in broadband wireless access, which employs OFDM (Orthogonal Frequency Division Multiplexing) as an alternative transmission to enable high speed data in communication system.
Are used between OFDM symbols by making the it larger than the expected multi path delay spread ISI can be completely eliminated?
In order to completely eliminate ISI, guard intervals are used between OFDM symbols. By making the guard interval larger than the expected multipath delay spread, ISI can be completely eliminated. This makes it easier to protect against multipath delay spread.
What is WiMAX mobile technology?
Worldwide Interoperability for Microwave Access, is a mobile technology aimed at delivering wireless data over long distances It is based on the IEEE 802.16 standard. The name WiMax was created by the WiMax Forum, which was formed in June 2001 to promote interoperability of the standard and certify products.
Is WiMAX a cellular technology?
Mobile WiMAX was a replacement candidate for cellular phone technologies such as GSM and CDMA, or can be used as an overlay to increase capacity. Fixed WiMAX is also considered as a wireless backhaul technology for 2G, 3G, and 4G networks in both developed and developing nations.
What is OFDM used for?
Orthogonal frequency division multiplexing (OFDM) is a modulation technique that is used in several applications ranging from cellular systems (3GLTE, WiMAX), wireless local area networks (LANs), digital audio radio, underwater communications, and even optical light modulation.
What is the purpose of OFDM?
The OFDM is a very efficient modulation technique that can achieve very high throughput by transmitting on a great number of carriers simultaneously. It is also very spectrally efficient because of the proximity of the subcarriers.
How does WiMax function?
WiMAX can support voice and video as well as Internet data. WiMax developed to provide wireless broadband access to buildings, either in competition to existing wired networks or alone in currently unserved rural or thinly populated areas. It can also be used to connect WLAN hotspots to the Internet.
How does WiMax operate?
WiMax operates over radio waves on a tower-receiver model. A single WiMax tower can provide coverage over about 8,000 square km (3,000 square miles) and also connect to other towers via a line-of-sight microwave link to broaden coverage further. The development of WiMax began in the early 21st century.
How is WiMAX technology used in mobile applications?
Additionally it is being used for mobile applications, providing high speed data to users on the move. The standard for WiMAX technology is a standard for Wireless Metropolitan Area Networks (WMANs) that has been developed by working group number 16 of IEEE 802, specializing in point-to-multipoint broadband wireless access.
What is the physical layer of WiMAX based on?
WiMAX – What is WiMAX? The WiMAX physical layer is based on orthogonal frequency division multiplexing.
How many carriers are involved in a WiMAX signal?
As a result it is often thought of as the WiMAX air interface. The WiMAX RF signal uses OFDM (orthogonal frequency division multiplex) techniques and the signal incorporates multiples of 128 carriers in a total signal bandwidth that may range from 1.25 to 20 MHz.
When did the first WiMAX standard come out?
The next major phase in WiMAX history was the development of the standards by the IEEE. The 802.16 standards working group was set up by the IEEE in 1999 under the IEEE 802 LAN/MAN Standards Committee. The first 802.16 standard was approved in December 2001and this was followed by two amendments to the basic 802.16 standard.