WiMAX | An Overview
Updated: Nov 28, 2020
You've apparently heard of WiFi. Now get active to hear a lot about #WiMax. The #technology operates like a stronger variant of the more common WiFi wireless communication networks. Unlike a wimpy #WiFi center that peters out a little bit beyond the confines of your local Starbucks, WiMax can turn an entire city into a hotspot.
Mobile WiMAX (WiMAX comes from "Worldwide Interoperability for Microwave Access") is a technical #wireless standard providing web browsing and wireless data transfer on the move. It's another way of calling the 802.16e protocol.
WiMAX technology contributes to the equivalent of #broadband speeds without the need for cables, and service coverage can extend over an entire city, region, or even an entire country.
History | Outline
Broadband wireless access is as essential as waterways, railroads, and interstate highways of a more prehistoric era. Broadband wireless access technical solutions and products have been ready for a remarkable time. These technologies have principally focused on affording high data rate connectivity wirelessly within fixed stable sites.
These technical clarifications are established in nature and experience from poor interoperability with other broadband wireless access products and high cost due to the necessity of economy of scale. The IEEE 802.16 BWA technology family, referred to as worldwide interoperability for microwave access (WiMAX), aims to provide a standardized broadband wireless access resolution.
WiMAX has a strong base of standardization and industry providers that provides a strong evolutionary path of its capabilities. The #IEEE 802.16 specifications continue to evolve and expand in capabilities in support of the evolving vision of WiMAX usage and deployment.
Need for WiMAX
The need for broadband co-operations is expanding exponentially. Conventional solutions that accommodate high-speed broadband access control wired access technologies, such as traditional cable, Ethernet, and fiber optic. It is remarkably difficult and expensive for carriers to establish and manage wired networks, especially in rural and remote areas.
Carriers are reluctant to install the essential equipment in these areas because of limited profit and potential. WiMAX will transform broadband communications in the advanced world and tie the digital divide in developing countries. Affordable wireless broadband passage for all is quite significant for a knowledge-based marketplace and society.
WiMAX will render affordable wireless broadband access for all, enhancing the quality of life thereby driving to economic empowerment.Access to the WiMAX wireless service is directed to a monthly subscription and it requires the usage of a dedicated WiMAX modem, which is usually supplied for free by the operator.
WiMAX technology enables for data transfer speeds of up to 75Mbps, but in reality, they serve to be a lot lower than that, at around 1-10 Mbps tops.
Advanced Features of Mobile WiMAX
Smart Antenna Technologies:- Smart antenna technologies typically comprise of complex vector or matrix operations on signals due to various antennas. OFDMA enables smart antenna services to be conducted on vector-flat sub-carriers. Complex equalizers are not expected to compensate for frequency selective fading. The smart antenna technologies supported include:
Beamforming: With beamforming, the system practices multiple-antennas to broadcast weighted signals to develop the coverage and capacity of the system and reduce outage probability.
Space-Time Code (STC): Transmit diversity such as the Alamouti code is recommended to render spatial diversity and diminish the fade margin.
Spatial Multiplexing (SM): Spatial multiplexing is encouraged to consider the benefit of higher peak rates and enhanced throughput. With spatial multiplexing, various streams are forwarded over multiple antennas. If the receiver also has added antennas, it can distribute the various streams to obtain higher throughput correlated to individual antenna arrangements.
Fractional Frequency Reuse:- Mobile WiMAX maintains frequency reuse of one, i.e. all cells/sectors work on the same frequency channel to maximize spectral efficiency. However, due to heavy cochannel interference (CCI) in frequency reuse one deployment, users at the cell periphery may undergo degradation in connection quality. With Mobile WiMAX, users conduct on subchannels, which only conquer a small fraction of the entire channel bandwidth; the cell edge interference problem can be easily discussed by suitably configuring subchannel practice without resorting to conventional frequency devising.
WiMax practices licensed bands of the spectrum, which means WiMax network carriers need to solicit government approvals (That's why the acceptance from the United Nations was helpful to WiMax-related companies.).
WiMax has been the most extensively used technology in developing countries and in distant rural locations, where settling down cable has often been prohibitively costly or where communications channels never had the fortune to develop before mobile technologies appeared. More lately, companies have adapted WiMax for applications with mobile phones.