Chapter 2
MIMO Propagation and Channel Modeling
2.1 Introduction
The channel is that part of a communication system that cannot be engineered. Propagation is at the heart of any wireless system; it sets the ultimate limits for other fields of communications engineering. However, we engineers should not see the propagation channel only as a limitation. We can devise methods to exploit the opportunities that this channel offers. In particular, we can put to work the spatial domain for our goal to improve wireless information transfer. If “Smart Antenna” was the catchword of the past in the area where signal processing meets electromagnetics, “MIMO” has taken its place today. Or is it just hype? While it is true that MIMO systems can, in ...
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