A new embedded ranging system in the ISM band is described. The proposed indoor ranging system combines the advantages of both broadband and narrowband signals to achieve high ranging accuracy in the presence of strong multipath reflections to achieve a good link budget and to be compliant with spectral regulations. The system is based on a WLAN transceiver (with embedded ranging specific circuits) and uses the same frequency band for both communication and ranging purposes so that no separate dedicated ranging transceiver is needed. A prototype has been implemented to evaluate the performance of the proposed technique in a realistic environment. Experimental results show ranging accuracies of less than 20 cm.
Accurate indoor positioning is very challenging. At this time, no solutions exist that can offer accurate distance measurements over large ranges. In this paper, we present a novel ranging technique. It offers sub-meter accuracy in indoor environments and can maintain this accuracy over hundreds of meters. Currently, this ranging technique has been demonstrated with a dedicated PCB implementation that confirms the unique combination of accuracy and range
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