By Yan Zhang, Hsiao-Hwa Chen
The instant Metropolitan quarter community (WirelessMAN) is a promising Broadband instant entry (BWA) know-how that gives high-speed, high-bandwidth potency and high-capacity multimedia providers for either residential and firm functions. cellular WiMAX: towards Broadband instant Metropolitan zone Networks examines the elemental ideas, fresh advances, and most up-to-date average standards pertinent to WirelessMANs, putting emphasis on IEEE 802.16-based WiMAX. After introducing the fundamentals of WirelessMAN, the ebook addresses subject matters in 3 obtainable components. the 1st half specializes in radio frequency (RF), sign processing, a number of in-multiple out (MIMO) know-how, and making a choice on demanding situations and attainable suggestions within the actual layer. An exam of protocol matters follows, together with these related to medium entry regulate (MAC), caliber of provider (QoS) in point-to-multi-point (PMP) and mesh networks, pass layer optimization, mobility administration, handoff in heterogeneous networks, power administration, and hyperlink variation mechanisms. the ultimate half considers matters concerning safeguard, financial system, and process means within the WiMAX. cellular WiMAX: towards Broadband instant Metropolitan zone Networks is a vital source for these attracted to figuring out all points appropriate to the technical, useful, financial, and coverage concerns pertaining to WirelessMANs. It deals entire useful and technical advice at the basics and up to date advances in most cases WirelessMAN, in addition to the newest common necessities in IEEE 802.16a/c/d/e households.
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Additional info for Mobile WiMAX: toward broadband wireless metropolitan area networks
A device for converting the frequency of a signal into a higher frequency. A complete terminal (typically with a small 4–5 ft antenna) that is designed to interact with other terminals in a satellite-delivered data network, commonly in a “star” configuration through a hub. The term small aperture here actually refers to the occupied bandwidth of the VSATs’ transmitted carrier, which is typically only a few kHz wide. The VSAT terminal uses a special and often proprietary modulation, scrambling and coding algorithms; this allows the hub or network operator to control the system and present billing based on a data throughput or other form of usage basis.
Regeneration is the function of restoring the signal (and/or bit stream) to its original shape and power level. , radio channel, fiber channel, twisted-pair copper channel, and so on). Regeneration correctively addresses signal attenuation, signal dispersion, and cross talk; this is done via signal reamplification, retiming, and reshaping. Regeneration is generally considered a layer 1 function in the Open Systems Interconnection Reference Model (OSIRM). 7 depicts a signal regeneration function pictorially.
The effective area of an antenna capable of radiating or receiving RF energy. In a typical parabolic antenna, this dimension is equivalent to the diameter of the main reflector. Also known as radiation efficiency, the ratio of the power applied to an antenna to the power actually radiated by the antenna, stated as a percentage. Point in a satellite orbit (especially for highly elliptical ones) that is farthest from the earth. In electrical systems, a resistive network that reduces the amplitude of a signal without appreciably distorting its waveform.