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Open AccessArticle

On the Performance Evaluation of a MIMO–WCDMA Transmission Architecture for Building Management Systems

Department of Electrical Engineering, School of Technological Applications, Technological Educational Institute of Sterea Ellada, 344 00 Dirfies Messapies, Greece
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Sensors 2018, 18(1), 155; https://doi.org/10.3390/s18010155
Received: 29 November 2017 / Revised: 3 January 2018 / Accepted: 3 January 2018 / Published: 8 January 2018
(This article belongs to the Special Issue Advances in Sensors for Sustainable Smart Cities and Smart Buildings)
The goal of this study was to investigate the performance of a realistic wireless sensor nodes deployment in order to support modern building management systems (BMSs). A three-floor building orientation is taken into account, where each node is equipped with a multi-antenna system while a central base station (BS) collects and processes all received information. The BS is also equipped with multiple antennas; hence, a multiple input–multiple output (MIMO) system is formulated. Due to the multiple reflections during transmission in the inner of the building, a wideband code division multiple access (WCDMA) physical layer protocol has been considered, which has already been adopted for third-generation (3G) mobile networks. Results are presented for various MIMO orientations, where the mean transmission power per node is considered as an output metric for a specific signal-to-noise ratio (SNR) requirement and number of resolvable multipath components. In the first set of presented results, the effects of multiple access interference on overall transmission power are highlighted. As the number of mobile nodes per floor or the requested transmission rate increases, MIMO systems of a higher order should be deployed in order to maintain transmission power at adequate levels. In the second set of results, a comparison is performed among transmission in diversity combining and spatial multiplexing mode, which clearly indicate that the first case is the most appropriate solution for indoor communications. View Full-Text
Keywords: building management systems; wideband code division multiple access (WCDMA); multiple input–multiple output (MIMO); Monte Carlo simulations; performance evaluation building management systems; wideband code division multiple access (WCDMA); multiple input–multiple output (MIMO); Monte Carlo simulations; performance evaluation
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Tsampasis, E.; Gkonis, P.K.; Trakadas, P.; Zahariadis, T. On the Performance Evaluation of a MIMO–WCDMA Transmission Architecture for Building Management Systems. Sensors 2018, 18, 155.

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