A four Channel 24-GHz FMCW Radar Sensor with two-dimensional Target Localization Capabilities

The measurement of different target parameters using radar systems has been an active research area for the last decades. Especially target angle measurement is a very demanding topic, because obtaining good measurement results often goes hand in hand with high hardware effort. This may be prohibitive for sensors used in the mass market, e.g. in automotive applications like adaptive cruise control. This work therefore addresses target localization using a compact frequency modulated continuous wave (FMCW) radar sensor. The angular measurement results are improved compared to standard beamforming methods using an adaptive beamforming approach that will be applied to the FMCW principle in a way that allows the use of well known methods for the determination of other target parameters like range or velocity. The applicability of the developed theory will be shown on different measurement scenarios using a 24-GHz radar system.