A UWB monitoring system for monitoring a spatial area, wherein the UWB monitoring system comprises a plurality of UWB sensors, which are arranged distributed in the spatial area, wherein the UWB sensors are configured for communication by means of UWB, wherein the plurality of UWB sensors comprises a plurality of localization sensors for determining positional data of mobile portable UWB tokens within the spatial area, wherein determining the positional data includes time-of-flight measurements of UWB signals between the localization sensors and the UWB tokens, wherein the UWB monitoring system is configured for detecting a presence of an unknown UWB token in the spatial area, wherein the unknown UWB token sends a first UWB useful signal, wherein the sent first UWB useful signal is encoded according to a first UWB data encoding scheme unknown to the monitoring system, wherein detecting the presence of the unknown UWB token comprises: • detecting a plurality of sensor signals by way of the spatially distributed plurality of localization sensors, wherein the detected sensor signals respectively comprise a noise signal and a first UWB useful signal sent by the unknown UWB token with which the noise signal is superimposed, wherein the useful signal, due to the spatial distribution of the localization sensors, appears with a sensor-dependent first time shift in the signals detected by the individual localization sensors, • amplifying the first UWB useful signal relative to the noise signal, wherein the amplification comprises combining the detected sensor signals with one another, wherein the detected sensor signals are shifted in time for combination respectively using a sensor-dependent second time shift, wherein the utilized second time shifts of the detected sensor signals are each inverse to the first time shift of the corresponding sensor signal and compensate for the corresponding first time shift, • detecting the amplified first UWB useful signal using the combined sensor signals. wherein the plurality of UWB sensors comprises a plurality of localization sensors for determining positional data of mobile portable UWB tokens within the spatial area, wherein determining the positional data includes time-of-flight measurements of UWB signals between the localization sensors and the UWB tokens, wherein the UWB monitoring system is configured for detecting a presence of an unknown UWB token in the spatial area, wherein the unknown UWB token sends a first UWB useful signal, wherein the sent first UWB useful signal is encoded according to a first UWB data encoding scheme unknown to the monitoring system, wherein detecting the presence of the unknown UWB token comprises: • detecting a plurality of sensor signals by way of the spatially distributed plurality of localization sensors, wherein the detected sensor signals respectively comprise a noise signal and a first UWB useful signal sent by the unknown UWB token with which the noise signal is superimposed, wherein the useful signal, due to the spatial distribution of the localization sensors, appears with a sensor-dependent first time shift in the signals detected by the individual localization sensors, • amplifying the first UWB useful signal relative to the noise signal, wherein the amplification comprises combining the detected sensor signals with one another, wherein the detected sensor signals are shifted in time for combination respectively using a sensor-dependent second time shift, wherein the utilized second time shifts of the detected sensor signals are each inverse to the first time shift of the corresponding sensor signal and compensate for the corresponding first time shift, • detecting the amplified first UWB useful signal using the combined sensor signals. • detecting a plurality of sensor signals by way of the spatially distributed plurality of localization sensors, wherein the detected sensor signals respectively comprise a noise signal and a first UWB useful signal sent by the unknown UWB token with which the noise signal is superimposed, wherein the useful signal, due to the spatial distribution of the localization sensors, appears with a sensor-dependent first time shift in the signals detected by the individual localization sensors, • amplifying the first UWB useful signal relative to the noise signal, wherein the amplification comprises combining the detected sensor signals with one another, wherein the detected sensor signals are shifted in time for combination respectively using a sensor-dependent second time shift, wherein the utilized second time shifts of the detected sensor signals are each inverse to the first time shift of the corresponding sensor signal and compensate for the corresponding first time shift, • detecting the amplified first UWB useful signal using the combined sensor signals.