Fundamentals of WiMAX: understanding broadband wireless networking PDF (probability density function) of Nakagami fading is parameterized by m and is. PDF | On Jan 1, , J. G. Andrews and others published Fundamentals of WiMAX: Understanding Broadband Wireless Networking. Fundamentals of WiMAX: Understanding Broadband Wireless Networking. Home · Fundamentals of WiMAX: Views 18MB Size Report. DOWNLOAD PDF.
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Fundamentals of WiMAX: Understanding Broadband Wireless Networking ( Prentice Hall Communications Engineering and Emerging Technologies Series from. Fundamentals of WiMAX. Understanding Broadband Wireless Networking. Jeffrey G. Andrews, Ph.D. Department of Electrical and Computer Engineering. Fundamentals of WiMAX: Understanding Broadband Wireless Networking. by The University of Texas at Austin Jeffrey G. Andrews Ph.D. - Department of.
Ali, A. Doucet, and Y. Yagishita, Y. Kakishima, and M.
Kim, J. Lee, Jac, and S. Villanueva, G. Siqueira, L. Matos, L. Gonsioroski and P. Castellanos, "Propagation Channel Characterization in the 2. Gonsioroski, L. Ron, and L. Benesty et al.
Goresky and A. Tse and P. Cueto, L.
Silva Mello, and C. Mnasri, M. Nedil, N. Kandil, L. The newer GSM networks are replacing the older system. Global area network[ edit ] A global area network GAN is a network used for supporting mobile across an arbitrary number of wireless LANs, satellite coverage areas, etc.
The key challenge in mobile communications is handing off user communications from one local coverage area to the next. Uses[ edit ] Some examples of usage include cellular phones which are part of everyday wireless networks, allowing easy personal communications. Another example, Intercontinental network systems, use radio satellites to communicate across the world.
Emergency services such as the police utilize wireless networks to communicate effectively as well. Individuals and businesses use wireless networks to send and share data rapidly, whether it be in a small office building or across the world. General[ edit ] In a general sense, wireless networks offer a vast variety of uses by both business and home users.
Each wireless technology is defined by a standard that describes unique functions at both the Physical and the Data Link layers of the OSI model. These standards differ in their specified signaling methods, geographic ranges, and frequency usages, among other things. Such differences can make certain technologies better suited to home networks and others better suited to network larger organizations.
The use of this technology also gives room for expansions, such as from 2G to 3G and, 4G and 5G technologies, which stand for the fourth and fifth generation of cell phone mobile communications standards. As wireless networking has become commonplace, sophistication increases through configuration of network hardware and software, and greater capacity to send and receive larger amounts of data, faster, is achieved.
Now the wireless network has been running on LTE, which is a 4G mobile communication standard. Users of an LTE network should have data speeds that are 10x faster than a 3G network.
Wireless networks offer many advantages when it comes to difficult-to-wire areas trying to communicate such as across a street or river, a warehouse on the other side of the premises or buildings that are physically separated but operate as one. Space is also created in homes as a result of eliminating clutters of wiring.
Home[ edit ] For homeowners, wireless technology is an effective option compared to Ethernet for sharing printers, scanners, and high-speed Internet connections.
WLANs help save the cost of installation of cable mediums, save time from physical installation, and also creates mobility for devices connected to the network.
These NEs can be stand-alone systems or products that are either supplied by a single manufacturer or are assembled by the service provider user or system integrator with parts from several different manufacturers. Wireless NEs are the products and devices used by a wireless carrier to provide support for the backhaul network as well as a mobile switching center MSC. Reliable wireless service depends on the network elements at the physical layer to be protected against all operational environments and applications see GR, Generic Requirements for Network Elements Used in Wireless Networks — Physical Layer Criteria.
The attachment hardware and the positioning of the antenna and associated closures and cables are required to have adequate strength, robustness, corrosion resistance, and resistance against wind, storms, icing, and other weather conditions. Requirements for individual components, such as hardware, cables, connectors, and closures, shall take into consideration the structure to which they are attached.
Interference[ edit ] Compared to wired systems, wireless networks are frequently subject to electromagnetic interference. This can be caused by other networks or other types of equipment that generate radio waves that are within, or close, to the radio bands used for communication. Interference can degrade the signal or cause the system to fail.
This can cause dead zones where no reception is available. Multipath fading[ edit ] In multipath fading two or more different routes taken by the signal, due to reflections, can cause the signal to cancel out at certain locations, and to be stronger in other places upfade. Station C can also communicate with Station B. However, Stations A and C cannot communicate with each other, but their signals can interfere at B.
The hidden node problem occurs in some types of network when a node is visible from a wireless access point AP , but not from other nodes communicating with that AP. This leads to difficulties in media access control collisions. Exposed terminal node problem[ edit ] The exposed terminal problem is when a node on one network is unable to send because of co-channel interference from a node that is on a different network. Shared resource problem[ edit ] The wireless spectrum is a limited resource and shared by all nodes in the range of its transmitters.
Bandwidth allocation becomes complex with multiple participating users.