Abstract
This chapter presents a brief introduction of wireless communication. Communication theory has been driven by the pioneering work of Claude Shannon and his idea of a channel capacity. On channels that are not highly random (e.g., free space wireless or wire-line), near capacity performance is achievable in a complexity that is implementable with modern technology. Multipath wireless communications produce channels that vary as a function of frequency, time, and space. This physical layer of variability is what makes reliable communication over wireless multipath channels more difficult to achieve. With the help of physical models of wireless propagation and communication waveforms and with the help of produced mathematical models of wireless systems (that allow insight to be drawn about the evolution of modern wireless communication systems and why MIMO (Multiple-Input Multiple-Output) wireless communication has seen a significant spike in interest ) it explains the recently designed wireless communication system.
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