5G multi-BS positioning with a single-antenna receiver

Cellular localization generally relies on timedifference-of-arrival (TDOA) measurements. In this paper, we investigate a novel scenario where the mobile user estimates its own position by jointly exploiting TDOA and angle of departure (AOD) measurements, which are estimated from downlink transmissions in a millimeter-wave (mmWave) multiple-input singleoutput (MISO) setup. We first perform a Fisher information analysis to derive the lower bounds on the estimation accuracy, and then propose a novel localization algorithm, which is able to provide improved performance also with few transmit antennas and limited bandwidth

Design and implementationof readout electronics for wireless reading of printed humidity sensors

Detta examensarbete har utförts vid Tekniska högskolan vid Linköpings universitet, i samarbete med Acreo Swedish ICT AB. Acreo är ett forskningsinstitut som sysslar med forskning inom bl.a. optik, elektronik och informationsteknologi. Examensarbetet har gått ut på att designa konstruera elektronik som ska kunna läsa av en passiv fuktsensoretikett, som är konstruerad med tryckt elektronik. Dessa etiketter ska kunna placeras inuti väggar på husbyggen, för att på ett enkelt sätt kontrollera fukthalten och på så vis kunna förebygga kostsamma fuktskador. Arbetet har bestått av komponenttester, kretsschemaritande, kretskortsdesign och programmering av mikrodatorer. Allt detta har i slutändan lett fram till en enkel prototyp som kan läsa av fuktsensoretiketterna. This bachelor thesis has been written at Linköping University in collaboration with Acreo Swedish ICT AB. Acreo is a research institute that performs applied research in optics, electronics and information technology. The goal of the thesis has been to design and construct electronics that can read a passive humidity sensor label, which is produced with printed electronics. These labels are to be placed inside walls at construction sites, to provide an easy method of determining the level of moisture inside the walls, and thereby prevent costly damages due to moisture. The work has consisted of component tests, schematic design, PCB design and programming of microprocessors. This project has led to a working prototype of a humidity sensor label reader