The main goal of the project is to develop 3-D Local Positioning System (LPS) which allows locating mobile objects inside multi-floor building. Required positioning accuracy is 2.5 meters in each floor (2-D positioning), third D is floor number. Frequency band – 2.4 GHz ISM band. What the system consists of LPS system must consist of: a number of tags - transmitting devices that each mobile object must equipped, a number of base stations (BS) which must: receive signals from tags, measure parameters of the signal which received from tags, communicate with each other over air, calculate tags position (only one BS is used for tags position calculations, it names central base station), visualization device which can show tag position on building plan. Project Goal

LPS environment – indoor a multi-floor building. Frequency band – 2.4 – MHz. Power density – 10 mW/MHz, but not more then 100 mW Type of positioning – 2-D positioning in each floor (3-D in future) Maximum size of a service area is 40x40 meters (100x100 in future) Positioning 2-D accuracy (determination error) meters. Type of signal modulation – spread spectrum. Tags density – maximum 100 per/service area (floor). CBS GUI must display all the trace of each tag within predetermined time period The base stations amount per floor (zone) is dependent on coverage area size and its configuration. Beacons (tags with fixed/known positions) are allowed. Each tag should periodically transmit still alive signal. Period time is approximately 1 hour. In alarm state tag should transmit alarm signal with period of 10 seconds. Quasi-Continuous tracking is required once the button of MS tag is pressed. Technical Specification – Main Issues

LPS System Development Status The system concept is fully defined and fully correspond to Development Plan Specification Band – 2.4 GHz Signals – DSSS Navigation – hyperbolic Required accuracy – 2.5 m5 BS in each service area 5 BS in each service area BS is based on DSP board, PC and self-made RF board tag is fully self-made based on RF and DSP chips Methods of synchronization will be clarified during system debugging Communication between BS using standard WLAN IEEE802.11b adapters

Algorithms & Simulation Development Status Signal Acquisition Algorithm of multi-channel and synchronous correlators for time-frequency signal search: Matlab Simulation Matlab program for real signal acquisition Multipath Effect Mitigation Algorithms Algorithm for multipath effect mitigation based on forward multipath system modeling and compensation of reflected rays Simulink Simulation Matlab Simulation Preliminary BS synchronization algorithms Preliminary Algorithms Allocation