Major applications for such systems are hospitals, homes for elderly, psychiatric institutions, guard services and electronic monitoring of staff in dangerous areas. Present systems do not provide a position determination with sufficient precision for the target area. The implementation requires comprehensive signal theoretical investigations and development work.
Radio propagation is affected by building room- and floor architecture.
Operation in lower frequency range is mandatory implying narrow bandwidth restriction requiring sophisticated signal processing algorithms. Our chair provides its resources in physical layer design and implementation. There is also experience in embedded system realisation. Potential algorithms for signal delay measurement between base transceiver stations and hand-held units need to be designed and verified. Multipath propagation complicating the delay measurement will be covered.