On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas
Wireless Personal Communications: An International Journal
Fundamentals of WiMAX: Understanding Broadband Wireless Networking (Prentice Hall Communications Engineering and Emerging Technologies Series)
WiMAX: Technology for Broadband Wireless Access
WiMAX: Technology for Broadband Wireless Access
Space-Time Coding: Theory and Practice
Space-Time Coding: Theory and Practice
MIMO-OFDM wireless systems: basics, perspectives, and challenges
IEEE Wireless Communications
Space-time block codes from orthogonal designs
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
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The past decade has seen an explosive increase in demand for wireless connectivity. Earlier it was driven mainly by cellular telephony, that is voice services, and presently by multimedia services. Although improved compression technologies have reduced the bandwidth needed for voice calls, data and video traffic will demand much more bandwidth as new services come online. The emerging demands for high data rate multimedia based services need high spectral efficiency to utilize the scarce available radio spectrum. Wireless mobile communication systems are characterized by time-varying propagation channels, generally termed as fading channels. Their fundamental limitation is due to the Signal-to-Noise Ratio (SNR) fluctuations over the dispersive channel. This paper describes the recent advancements for increasing spectral efficiency using Adaptive Modulation and Coding (AMC), Orthogonal Frequency Division Multiplexing (OFDM) and Multiple-Input Multiple-Output (MIMO) techniques in Worldwide Interoperability for Microwave Access (WiMAX - 802.16d).