By Benny Bing
Provides a transparent, coherent assessment of all significant instant broadband criteria with an emphasis on coping with the explosive progress in cellular video
802.11ac/ad, 802.16m, 802.22, and LTE-Advanced are the rising broadband instant criteria that provide many strong instant positive factors. This publication offers an obtainable assessment of a number of the criteria and functional details on 802.11 hyperlink edition, 4G cellphone antenna layout, instant video streaming, and shrewdpermanent grids.
Broadband instant Multimedia Networks distills the numerous advanced instant beneficial properties in a fresh and concise demeanour in order that the reader can comprehend the most important ideas. issues coated contain adaptive modulation and coding, orthogonal frequency-division a number of entry, single-carrier frequency-division a number of entry, a number of antenna platforms, medium entry keep an eye on time and frequency-division duplex, transmission, and the body codecs. With instant operators now wearing a far larger volume of video site visitors than information and voice site visitors, the booklet additionally covers adaptive bit price streaming and bandwidth administration for 3D and HD video supply to multi-screen own devices.
Featured chapters within the ebook are:
- Overview of Broadband instant Networks
- IEEE 802.11 Standard
- IEEE 802.16 Standard
- Long-Term Evolution
- ATSC electronic television and IEEE 802.22 Standards
- Mesh, Relay, and Interworking Networks
- Wireless Video Streaming
- Green Communications in instant domestic region Networks
Including over one hundred eighty chapter-end routines and 2 hundred illustrative figures; and available recorded tutorials, Broadband instant Multimedia Networks is perfect for execs and practitioners, graduate scholars, and researchers.
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Extra resources for Broadband Wireless Access
However, an OFDM system uses less bandwidth than an equivalent multicarrier system because the frequency subchannels are overlapped. This is achieved using orthogonal signals in the subchannels. OFDM offers frequency diversity which can be exploited by proper coding to combat frequency-selective fading. OFDM signals can be generated and decoded using Fast Fourier Transform (FFT), which can be adapted to different data rates and different link conditions. Since both transmitter and receiver modulation can be achieved using FFT, this allows efficient digital signal processing implementation and significantly reduces the amount of required hardware compared to conventional Frequency Division Multiple Access (FDMA) systems.
Some distributed reservation protocols inevitably rely on communicating users being able to synchronize their transmissions according to their positions on a global queue. This requires users to exchange control (feedback) information, either explicitly or implicitly. Using this information, all users then execute independently, the same algorithm, resulting in some coordination in their actions. Clearly, it is essential that all users receive the same information regarding the demands placed on the system and its usage.
On the other hand, ARQ schemes are simpler and more flexible to implement but suffer from variable delay. 4 Multicarrier Transmission At high data rates, the computation complexity for an equalizer increases. In addition, the overhead for channel estimation increases when the channel is time-varying. Multicarrier (multitone) systems are parallel transmission schemes that compensate for the multipath delay spread without the need for equalization. The principle behind multicarrier schemes is that since ISI due to multipath is only a problem for very high signaling rates (typically above 1 Mbit/s), one can reduce the signaling rate until there is no degradation in performance due to ISI.