Analysis and Simulation of Near Field Effects for Widely Separated Coherent FMCW Radar Networks

In this work, the near-field effects for widely separated coherent FMCW radar networks are analyzed and simulated. With the help of the ambiguity function, a paradigmatic radar network consisting of 4 sensors is investigated for different scenarios. Therefore, different models are derived and simulated. In addition, the influence of the radar parameters is scrutinized. The results show that for long-range scenarios, an adjusted estimator is often necessary, whereas in short-range scenarios, a range compensation with a matched filter is needed. With the help of the described models, it can be assessed which signal processing is necessary for the respective distributed radar system.