Algorithms for Communications Systems and their Applications, 2nd Edition

Chapter 9Transmission over multiple input multiple output channels

In this chapter, we discuss several transmit/receive techniques over multiple input multiple output (MIMO) channels. The chapter will focus on single carrier (SC) systems over narrowband (NB) MIMO channels. More interesting, the same models hold for a subchannel of a multicarrier (MC) system over a dispersive MIMO channel. As a reference scenario, we will consider wireless links (for which the MIMO channel model was also introduced in Section 4.1.11), where inputs are given by transmitting antennas and outputs are given by receiving antennas. Still, MIMO techniques find applications also in other communication contexts, for example optical fibres and acoustic communications, where antennas are replaced by optical and acoustic devices, respectively. Moreover, a MIMO channel can also model a (wireless) MC system affected by inter‐carrier interference, wherein inputs and outputs are subchannels, rather than physical devices.

In the first part of the chapter, we will consider a single transmitter communicating with a single receiver, where each device is equipped with multiple antennas. Therefore, transmitted (received) signals can be jointly processed at the transmitter (receiver). In the second part of the chapter, we will consider instead multiple transmitters (each possibly equipped with multiple antennas) transmitting independent data signals to multiple receivers (again, each possibly equipped with multiple ...