Chapter 2

From Multi-Dimensional Propagation to Multi-Link MIMO Channels

As seen in Chapter 1, many signal processing techniques have been developed with very simple assumptions regarding physical wireless channels, including multi-antenna channels. In particular, we have considered so far that the elements of the MIMO channel matrix are uncorrelated variables. In practical scenarios, these assumptions may be far from realistic. Yet, the characteristics of radio propagation environments dictate the ultimate performance of wireless systems, irrespective of the assumptions used to design the system. The goal of Chapters 2, 3 and 4 is precisely to understand the principle of MIMO propagation, and to investigate analytical representations and realistic ...

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