  One rarely addressed direction in the context of Integrated Sensing and
Communication (ISAC) is non-line-of-sight (NLOS) sensing, with the potential to
enable use cases like intrusion detection and to increase the value that
wireless networks can bring. However, ISAC networks impose challenges for
sensing due to their communication-oriented design. For instance, time division
duplex transmission creates spectral holes in time, resulting in spectral
replicas in the radar image. To counteract this, we evaluate different channel
state information processing strategies and discuss their tradeoffs. We further
propose an ensemble of techniques to detect targets in NLOS conditions. Our
approaches are validated with experiments using a millimeter wave ISAC proof of
concept in a factory-like environment. The results show that target detection
in NLOS is generally possible with ISAC.
