Chapter 7. Wideband MIMO Channels and Practical Aspects

By Emil Björnson, KTH Royal Institute of Technology, Sweden, | Özlem Tuğfe Demir, KTH Royal Institute of Technology, Sweden

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Published: 17 Jan 2024

© 2024 Emil Björnson | Özlem Tuğfe Demir


In this chapter, we extend the previously developed MIMO theory to handle these situations. We will first show how multicarrier modulation appears as the natural transmission method when dealing with inter-symbol interference. We then derive the resulting multicarrier MIMO capacity and describe how the subcarrier channels depend on the multipath clusters. Next, we discuss practical hardware implementation of precoding and combining, and when the typical digital architecture can be simplified into an analog or hybrid architecture. Finally, we will exemplify two practical MIMO implementations and elaborate on different MIMO-related terminologies and their meanings.