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Fundamentals of WiMAX: Understanding Broadband Wireless Networking by The University of Texas at Austin Jeffrey G. Andrews Ph.D. - Department of Electrical and Computer Engineering, Ph.D. - AT&T Labs Inc. Arunabha Ghosh, Rias Muhamed - AT&T Labs Inc.

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Chapter 8PHY Layer of WiMAX

The physical (PHY) layer of WiMAX is based on the IEEE 802.16-2004 and IEEE 802.16e-2005 standards and was designed with much influence from Wi-Fi, especially IEEE 802.11a. Although many aspects of the two technologies are different due to the inherent difference in their purpose and applications, some of their basic constructs are very similar. Like Wi-Fi, WiMAX is based on the principles of orthogonal frequency division multiplexing (OFDM) as previously introduced in Chapter 4, which is a suitable modulation/access technique for non–line-of-sight (LOS) conditions with high data rates. In WiMAX, however, the various parameters pertaining to the physical layer, such as number of subcarriers, pilots, guard band and ...

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