Radars which rely on the frequency-modulated continuous-wave (FMCW) principle are widely used in commercial applications due to their advantages such as:

• The use of continuous-wave signals leads to a relatively low peak power, which is beneficial for realization as integrated circuits.
• FMCW radars allow to combine large RF-bandwidth, and therefore excellent range resolution, with moderate frequencies in the processing stages after down-conversion.

One focus area of our research is to investigate techniques which combine FMCW systems with multiple-input multiple-output (MIMO) technology. For this purpose, we realize prototype systems using approaches like time division multiple access (TDMA), frequency division multiple access (FDMA), or code division multiple access (CDMA) to realize the MIMO functionality. These approaches are tested and compared in terms of measurement performance and applicability to different measurement tasks. Furthermore, also the complexity of realization in different technologies is an important part of our investigations.