switched to MDPI journal layout
This commit is contained in:
@@ -1,39 +1,32 @@
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\documentclass[acmlarge]{acmart}
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%\documentclass[acmlarge]{acmart}
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\documentclass[ijgi,article,submit,moreauthors,pdftex,10pt,a4paper]{mdpi}
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%\documentclass[journal,article,accept,moreauthors,pdftex,10pt,a4paper]{mdpi}
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\usepackage{booktabs} % For formal tables
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%\usepackage{booktabs} % For formal tables
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\usepackage[ruled]{algorithm2e} % For algorithms
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\renewcommand{\algorithmcfname}{ALGORITHM}
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\SetAlFnt{\small}
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\SetAlCapFnt{\small}
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\SetAlCapNameFnt{\small}
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\SetAlCapHSkip{0pt}
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\IncMargin{-\parindent}
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% correct bad hyphenation here
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%\hyphenation{op-tical net-works semi-conduc-tor}
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%\usepackage[ruled]{algorithm2e} % For algorithms
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%\renewcommand{\algorithmcfname}{ALGORITHM}
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%\SetAlFnt{\small}
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%\SetAlCapFnt{\small}
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%\SetAlCapNameFnt{\small}
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%\SetAlCapHSkip{0pt}
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%\IncMargin{-\parindent}
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% Metadata Information
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\acmJournal{IMWUT}
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\acmVolume{0}
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\acmNumber{0}
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\acmArticle{0}
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\acmYear{2017}
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\acmMonth{0}
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\acmArticleSeq{0}
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% Copyright
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\setcopyright{acmcopyright}
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%\setcopyright{acmlicensed}
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%\setcopyright{rightsretained}
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%\setcopyright{usgov}
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%\setcopyright{usgovmixed}
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%\setcopyright{cagov}
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%\setcopyright{cagovmixed}
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% DOI
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\acmDOI{0000001.0000001}
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% Paper history
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\received{dummy}
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\received[accepted]{dummy}
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\firstpage{1}
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\makeatletter
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\setcounter{page}{\@firstpage}
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\makeatother
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\articlenumber{x}
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\doinum{10.3390/------}
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\pubvolume{xx}
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\pubyear{2017}
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\copyrightyear{2017}
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\externaleditor{Academic Editor: name}
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\history{Received: date; Accepted: date; Published: date}
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\usepackage{color, colortbl}
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@@ -93,8 +86,7 @@
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\graphicspath{ {gfx/paths/},{gfx/},{gfx2/}}
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% correct bad hyphenation here
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\hyphenation{op-tical net-works semi-conduc-tor}
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% input stuff
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@@ -102,84 +94,51 @@
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\input{misc/functions}
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\Title{On \docWIFI{} Optimizations for Smartphone-based Indoor Localization}
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% Authors, for the paper (add full first names)
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\Author{Frank Ebner $^{1}$\orcidONE{}, Toni Fetzer $^{1}$\orcidTWO{}, Frank Deinzer $^{1}$ and Marcin Grzegorzek $^{2}$ }
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% Authors, for metadata in PDF
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\AuthorNames{Frank Ebner, Toni Fetzer, Frank Deinzer and Marcin Grzegorzek}
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\keyword{indoor localization; smartphones; \docWIFI{}; IMU; sensor fusion; optimization}
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% Author Orchid ID: enter ID or remove command
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\orcidauthorONE{0000-0002-4698-8232} % Add \orcidONE{} behind the author's name
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\orcidauthorTWO{0000-0002-8249-8783} % Add \orcidTWO{} behind the author's name
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% Affiliations / Addresses (Add [1] after \address if there is only one affiliation.)
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\address{%
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$^{1}$ \quad University of Applied Sciences W\"urzburg-Schweinfurt - Faculty of Computer Science and Business Information Systems; frank.ebner@fhws.de, toni.fetzer@fhws.de, frank.deinzer@fhws.de\\
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$^{2}$ \quad University of Siegen - Pattern Recognition Group; marcin.grzegorzek@uni-siegen.de}
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% Contact information of the corresponding author
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%\corres{Correspondence: e-mail@e-mail.com; Tel.: +x-xxx-xxx-xxxx}
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\input{chapters/abstract}
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\begin{document}
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\title{On \docWIFI{} Optimizations for Smartphone-based Indoor Localization}
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\author{Frank Ebner}
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\author{Toni Fetzer}
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\author{Frank Deinzer}
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\affiliation{%
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\institution{University of Applied Sciences W\"urzburg-Schweinfurt}
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\department{Faculty of Computer Science and Business Information Systems}
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\city{W\"urzburg}
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%\state{VA}
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%\postcode{22903}
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\country{Germany}
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}
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\author{Marcin Grzegorzek}
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\affiliation{%
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\institution{University of Siegen}
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\department{Pattern Recognition Group}
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\city{Siegen}
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%\state{VA}
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%\postcode{22903}
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\country{Germany}
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}
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\input{chapters/abstract}
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\maketitle
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\input{chapters/introduction}
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\input{chapters/relatedwork}
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\input{chapters/system}
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% For peer review papers, you can put extra information on the cover
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% page as needed:
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% \ifCLASSOPTIONpeerreview
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% \begin{center} \bfseries EDICS Category: 3-BBND \end{center}
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% \fi
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%
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% For peerreview papers, this IEEEtran command inserts a page break and
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% creates the second title. It will be ignored for other modes.
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%\IEEEpeerreviewmaketitle
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\input{chapters/work}
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\input{chapters/experiments}
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\input{chapters/introduction}
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\input{chapters/conclusion}
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\input{chapters/relatedwork}
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\input{chapters/system}
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\input{chapters/work}
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\input{chapters/experiments}
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\input{chapters/conclusion}
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% conference papers do not normally have an appendix
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% use section* for acknowledgment
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%\section*{Acknowledgment}
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%The authors would like to thank...
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% balancing
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%\IEEEtriggeratref{8}
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% The "triggered" command can be changed if desired:
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%\IEEEtriggercmd{\enlargethispage{-5in}}
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% references section
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%\bibliographystyle{IEEEtran}
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%\bibliography{IEEEabrv,egbib}
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\bibliographystyle{ACM-Reference-Format}
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\bibliography{egbib}
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%\bibliographystyle{ACM-Reference-Format}
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\externalbibliography{yes}
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\bibliography{egbib}
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\end{document}
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@@ -1,5 +1,5 @@
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\begin{abstract}
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\abstract{%
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%
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Indoor localization and indoor pedestrian navigation is an active field of research
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with increasing attention.
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%
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@@ -12,7 +12,7 @@
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While more complex models provide an increased accuracy by including architectural knowledge
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about walls and other obstacles, they often require additional computation during runtime and
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demand for prior knowledge during setup.
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\\%
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Within this work we will thus focus on simple, easy to set-up models and evaluate their
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performance compared to real-world measurements. The evaluation ranges from a fully empiric, instant
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setup, given the transmitter locations are well-known, to a highly-optimized scenario based
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@@ -23,36 +23,18 @@
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All of the optimized models are evaluated within an actual smartphone-based
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indoor localization system. This system uses the phone's \docWIFI{}, barometer and IMU
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to infer the pedestrian's current location via recursive density estimation based on particle filtering.
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\\%
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We will show that while a \SI{100}{\percent} empiric parameter choice for the model already provides enough
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accuracy for many use-cases, a small number of reference measurements is enough to dramatically increase
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such a system's performance.
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%
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}
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%system setup kostet oft sehr viel zeit [fingerprinting kostet]
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%deshalb werden alternativen untersucht:
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%bekannte AP position mit empirischen parametern
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%und optimierung durch einige referenzmessungen
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%floorplan wird für die navigation bzw orientierung des anwenders eh gebraucht
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%dann kann man ihn auch gleich für ein bewegungsmodell nutzen
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%es sollte klar werden, dass es auch darum geht, effizient
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%auf einem normalen smartphone lauffähig zu sein [passend zum journal]
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\end{abstract}
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% TODO
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\begin{CCSXML}
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\end{CCSXML}
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%\ccsdesc[500]{Computer systems organization~Embedded systems}
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%\ccsdesc[300]{Computer systems organization~Redundancy}
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%\ccsdesc{Computer systems organization~Robotics}
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%s\ccsdesc[100]{Networks~Network reliability}
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\keywords{\docWIFI{}, indoor localization, sensor fusion}
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@@ -36,8 +36,7 @@
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While we were able to improve the performance of the \docWIFI{} sensor component,
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the filtering process should be more robust against erroneous observations.
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Getting stuck should be prevented, independent of minor changes in quality for
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the signal strength prediction model \cite{todo-toni}.
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\commentByFrank{cite auf toni?!}
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the signal strength prediction model \cite{Fetzer-17}.
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Our \docWIFI{} quality metric often was able to determine situations that
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would yield multimodal or bad \docWIFI{} estimations and temporarily
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@@ -18,8 +18,12 @@
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Within all \docWIFI{} observations, we only consider the \docAP{}s that are permanently installed
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and can be identified by their well-known MAC address.
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Temporal and movable transmitters like smart TVs or smartphone hotspots are ignored as they might cause estimation errors.
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The \docWIFI{} quality factor from section \ref{sec:wifiQuality} was configured with
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a lower bound of \SI{-85}{\decibel m}, an upper bound of \SI{-70}{\decibel m} and a threshold of $0.25$.
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%
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Unfortunately, due to non-disclosure agreements, we are not allowed to depict the actual location
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Unfortunately, due to legal reasons, our institution does not allow depicting the actual location
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of installed transmitters within the following figures.
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@@ -157,26 +161,27 @@
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distance between estimated and real position is $\sim$\SI{8}{\meter} and the maximum $\sim$\SI{27}{\meter}.
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For \SI{68}{\percent} of all installed transmitters, the estimated floor-number matched the real location.
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\newcommand{\tablefont}{\scriptsize}
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\begin{figure}
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% cumulative error density
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\centering
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\begin{subfigure}{0.52\textwidth}
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\input{gfx2/wifi_model_error_0_95.tex}
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\end{subfigure}
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% table
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\end{subfigure}%
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\begin{subfigure}{0.47\textwidth}
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\smaller
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\centering
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\begin{tabular}{|l|c|c|c|c|}
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\hline
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& 25 \% & median & 75 \% & avg \\\hline
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\noOptEmpiric{} & \SI{2.5}{\decibel} & \SI{5.6}{\decibel} & \SI{9.3}{\decibel} & \SI{6.5}{\decibel} \\\hline
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\optParamsAllAP{} & \SI{2.0}{\decibel} & \SI{4.3}{\decibel} & \SI{7.5}{\decibel} & \SI{5.4}{\decibel} \\\hline
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\optParamsEachAP{} & \SI{1.6}{\decibel} & \SI{3.3}{\decibel} & \SI{6.2}{\decibel} & \SI{4.4}{\decibel} \\\hline
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\optParamsPosEachAP{} & \SI{1.5}{\decibel} & \SI{3.0}{\decibel} & \SI{5.5}{\decibel} & \SI{3.8}{\decibel} \\\hline
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\optPerFloor{} & \SI{0.7}{\decibel} & \SI{1.6}{\decibel} & \SI{3.3}{\decibel} & \SI{2.6}{\decibel} \\\hline
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\optPerRegion{} & \SI{0.6}{\decibel} & \SI{1.4}{\decibel} & \SI{3.1}{\decibel} & \SI{2.4}{\decibel} \\\hline
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\end{tabular}
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\vspace{9mm}
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\begin{tabular}{|l|c|c|c|c|}
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\hline
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& \tablefont 25 \% & \tablefont median & \tablefont 75 \% & \tablefont avg \\\hline
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\tablefont\noOptEmpiric{} & \tablefont\SI{2.5}{\decibel} & \tablefont\SI{5.6}{\decibel} & \tablefont\SI{9.3}{\decibel} & \tablefont\SI{6.5}{\decibel} \\\hline
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\tablefont\optParamsAllAP{} & \tablefont\SI{2.0}{\decibel} & \tablefont\SI{4.3}{\decibel} & \tablefont\SI{7.5}{\decibel} & \tablefont\SI{5.4}{\decibel} \\\hline
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\tablefont\optParamsEachAP{} & \tablefont\SI{1.6}{\decibel} & \tablefont\SI{3.3}{\decibel} & \tablefont\SI{6.2}{\decibel} & \tablefont\SI{4.4}{\decibel} \\\hline
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\tablefont\optParamsPosEachAP{} & \tablefont\SI{1.5}{\decibel} & \tablefont\SI{3.0}{\decibel} & \tablefont\SI{5.5}{\decibel} & \tablefont\SI{3.8}{\decibel} \\\hline
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\tablefont\optPerFloor{} & \tablefont\SI{0.7}{\decibel} & \tablefont\SI{1.6}{\decibel} & \tablefont\SI{3.3}{\decibel} & \tablefont\SI{2.6}{\decibel} \\\hline
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\tablefont\optPerRegion{} & \tablefont\SI{0.6}{\decibel} & \tablefont\SI{1.4}{\decibel} & \tablefont\SI{3.1}{\decibel} & \tablefont\SI{2.4}{\decibel} \\\hline
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\end{tabular}
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\vspace{8mm}
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\end{subfigure}
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\caption{
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Cumulative error distribution for all optimization strategies. The error results from the (absolute) difference
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@@ -189,6 +194,7 @@
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\begin{figure}
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\centering
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\begin{subfigure}{0.32\textwidth}
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\centering
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\input{gfx2/wifiMaxErrorNN_opt0.tex}
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@@ -261,6 +267,7 @@
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region for the optimization to converge.
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\begin{figure}
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\centering
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\begin{subfigure}{0.49\textwidth}
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\input{gfx2/wifi_model_error_num_fingerprints_method_5_0_90.tex}
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\end{subfigure}
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@@ -414,6 +421,7 @@
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\end{figure}
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\begin{figure}
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\centering
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% error gfx
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\begin{subfigure}{0.52\textwidth}
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\centering
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@@ -427,19 +435,19 @@
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%4.30191 6.91534 14.0746 11.948
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%4.26189 6.35975 11.5646 10.7466
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\begin{subfigure}{0.47\textwidth}
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\smaller
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\footnotesize
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\centering
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\begin{tabular}{|l|c|c|c|c|}
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\hline
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& \SI{25}{\percent} & median & \SI{75}{\percent} & avg \\\hline
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\noOptEmpiric{} & \SI{6.0}{\meter} & \SI{9.2}{\meter} & \SI{14.4}{\meter} & \SI{11.9}{\meter} \\\hline
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\optParamsAllAP{} & \SI{6.5}{\meter} & \SI{9.0}{\meter} & \SI{12.8}{\meter} & \SI{12.0}{\meter} \\\hline
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\optParamsEachAP{} & \SI{6.8}{\meter} & \SI{9.8}{\meter} & \SI{13.8}{\meter} & \SI{13.0}{\meter} \\\hline
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\optParamsPosEachAP{} & \SI{5.4}{\meter} & \SI{8.6}{\meter} & \SI{14.8}{\meter} & \SI{12.0}{\meter} \\\hline
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\optPerFloor{} & \SI{4.3}{\meter} & \SI{6.9}{\meter} & \SI{14.0}{\meter} & \SI{11.9}{\meter} \\\hline
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\optPerRegion{} & \SI{4.2}{\meter} & \SI{6.5}{\meter} & \SI{11.6}{\meter} & \SI{10.7}{\meter} \\\hline
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& \tablefont\SI{25}{\percent} & \tablefont median & \tablefont\SI{75}{\percent} & \tablefont avg \\\hline
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\tablefont\noOptEmpiric{} & \tablefont\SI{6.0}{\meter} & \tablefont\SI{9.2}{\meter} & \tablefont\SI{14.4}{\meter} & \tablefont\SI{11.9}{\meter} \\\hline
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\tablefont\optParamsAllAP{} & \tablefont\SI{6.5}{\meter} & \tablefont\SI{9.0}{\meter} & \tablefont\SI{12.8}{\meter} & \tablefont\SI{12.0}{\meter} \\\hline
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\tablefont\optParamsEachAP{} & \tablefont\SI{6.8}{\meter} & \tablefont\SI{9.8}{\meter} & \tablefont\SI{13.8}{\meter} & \tablefont\SI{13.0}{\meter} \\\hline
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\tablefont\optParamsPosEachAP{} & \tablefont\SI{5.4}{\meter} & \tablefont\SI{8.6}{\meter} & \tablefont\SI{14.8}{\meter} & \tablefont\SI{12.0}{\meter} \\\hline
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\tablefont\optPerFloor{} & \tablefont\SI{4.3}{\meter} & \tablefont\SI{6.9}{\meter} & \tablefont\SI{14.0}{\meter} & \tablefont\SI{11.9}{\meter} \\\hline
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\tablefont\optPerRegion{} & \tablefont\SI{4.2}{\meter} & \tablefont\SI{6.5}{\meter} & \tablefont\SI{11.6}{\meter} & \tablefont\SI{10.7}{\meter} \\\hline
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\end{tabular}
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\vspace{9mm}
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\vspace{7mm}
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\end{subfigure}
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\caption {
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Cumulative error distribution between walked ground truth and \docWIFI{}-only location estimation using \refeq{eq:bestWiFiPos}.
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@@ -470,6 +478,7 @@
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% -------------------------------- plots indicating walk issues -------------------------------- %
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\begin{figure}
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\centering
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\input{gfx2/wifiMultimodality.tex}
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\caption{
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\docWIFI{}-only location probability for three distinct scans where
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@@ -652,6 +661,7 @@
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keep the pedestrian's heading until the signal quality reached sane levels again.
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\begin{figure}
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\centering
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\begin{subfigure}{0.49\textwidth}
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\input{gfx2/overall-system-error.tex}
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\end{subfigure}
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@@ -669,16 +679,16 @@
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\begin{tabular}{|l|c|c|c|c|c|}
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\hline
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& \SI{25}{\percent} & median & \SI{75}{\percent} & avg & stuck \\\hline
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||||
\noOptEmpiric{} & \SI{2.6}{\meter} & \SI{5.1}{\meter} & \SI{11.2}{\meter} & \SI{9.0}{\meter} & \SI{22}{\percent} \\\hline
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\optParamsAllAP{} & \SI{2.9}{\meter} & \SI{6.0}{\meter} & \SI{12.4}{\meter} & \SI{10.7}{\meter} & \SI{15}{\percent} \\\hline
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\optParamsEachAP{} & \SI{1.9}{\meter} & \SI{4.0}{\meter} & \SI{7.9}{\meter} & \SI{5.8}{\meter} & \SI{5}{\percent} \\\hline
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\optParamsPosEachAP{} & \SI{1.9}{\meter} & \SI{3.9}{\meter} & \SI{7.1}{\meter} & \SI{5.6}{\meter} & \SI{5}{\percent} \\\hline
|
||||
\optPerFloor{} & \SI{1.6}{\meter} & \SI{3.2}{\meter} & \SI{6.1}{\meter} & \SI{4.8}{\meter} & \SI{4}{\percent} \\\hline
|
||||
\optPerRegion{} & \SI{1.6}{\meter} & \SI{3.3}{\meter} & \SI{6.5}{\meter} & \SI{5.0}{\meter} & \SI{4}{\percent} \\\hline
|
||||
& \tablefont\SI{25}{\percent} & \tablefont median & \tablefont\SI{75}{\percent} & \tablefont avg & \tablefont stuck \\\hline
|
||||
\tablefont\noOptEmpiric{} & \tablefont\SI{2.6}{\meter} & \tablefont\SI{5.1}{\meter} & \tablefont\SI{11.2}{\meter} & \tablefont\SI{9.0}{\meter} & \tablefont\SI{22}{\percent} \\\hline
|
||||
\tablefont\optParamsAllAP{} & \tablefont\SI{2.9}{\meter} & \tablefont\SI{6.0}{\meter} & \tablefont\SI{12.4}{\meter} & \tablefont\SI{10.7}{\meter} & \tablefont\SI{15}{\percent} \\\hline
|
||||
\tablefont\optParamsEachAP{} & \tablefont\SI{1.9}{\meter} & \tablefont\SI{4.0}{\meter} & \tablefont\SI{7.9}{\meter} & \tablefont\SI{5.8}{\meter} & \tablefont\SI{5}{\percent} \\\hline
|
||||
\tablefont\optParamsPosEachAP{} & \tablefont\SI{1.9}{\meter} & \tablefont\SI{3.9}{\meter} & \tablefont\SI{7.1}{\meter} & \tablefont\SI{5.6}{\meter} & \tablefont\SI{5}{\percent} \\\hline
|
||||
\tablefont\optPerFloor{} & \tablefont\SI{1.6}{\meter} & \tablefont\SI{3.2}{\meter} & \tablefont\SI{6.1}{\meter} & \tablefont\SI{4.8}{\meter} & \tablefont\SI{4}{\percent} \\\hline
|
||||
\tablefont\optPerRegion{} & \tablefont\SI{1.6}{\meter} & \tablefont\SI{3.3}{\meter} & \tablefont\SI{6.5}{\meter} & \tablefont\SI{5.0}{\meter} & \tablefont\SI{4}{\percent} \\\hline
|
||||
\end{tabular}
|
||||
\setlength{\tabcolsep}{1.0em} % reset the horizontal padding
|
||||
\vspace{11.5mm}
|
||||
\vspace{9.0mm}
|
||||
\end{subfigure}
|
||||
%
|
||||
\caption{
|
||||
|
||||
@@ -41,7 +41,7 @@
|
||||
\label{sec:sigStrengthModel}
|
||||
|
||||
\begin{equation}
|
||||
\mRssi = \mTXP{} + 10 \mPLE{} + \log_{10} \frac{d}{d_0} + \mGaussNoise{}
|
||||
\mRssi = \mTXP{} - 10 \mPLE{} + \log_{10} \frac{d}{d_0} + \mGaussNoise{}
|
||||
\label{eq:logDistModel}
|
||||
\end{equation}
|
||||
|
||||
@@ -79,7 +79,7 @@
|
||||
without costly intersection checks and thus allows for real-time use-cases running on smartphones.
|
||||
|
||||
\begin{equation}
|
||||
\mRssi = \mTXP{} + 10 \mPLE{} + \log_{10} \frac{d}{d_0} + \numFloors{} \mWAF{} + \mGaussNoise{}
|
||||
\mRssi = \mTXP{} - 10 \mPLE{} + \log_{10} \frac{d}{d_0} + \numFloors{} \mWAF{} + \mGaussNoise{}
|
||||
\label{eq:logNormShadowModel}
|
||||
\end{equation}
|
||||
|
||||
@@ -284,6 +284,9 @@
|
||||
In \refeq{eq:wifiQuality} we use the average signal strength $\bar\mRssi$ among all \docAP{}s seen within one measurement
|
||||
$\mRssiVec$ and scale this value to match a region of $[0, 1]$ depending on an upper and lower bound.
|
||||
If the returned quality is below a certain threshold, \docWIFI{} is ignored within the evaluation.
|
||||
Lower and upper bound are chosen empirically by looking at the usual range of \docWIFI{} signal strengths,
|
||||
that still provide persistent data-connections to clients. The threshold is also determined empirically by examining
|
||||
the results of \refeq{eq:wifiQuality} for some places with good and bad \docWIFI{} location estimations, respectively.
|
||||
|
||||
\begin{equation}
|
||||
\newcommand{\leMin}{l_\text{min}}
|
||||
|
||||
@@ -1,3 +1,4 @@
|
||||
|
||||
@Book{Szeliski08,
|
||||
author = {R. Szeliski},
|
||||
title = {Computer Vision: Algorithms and Applications},
|
||||
@@ -2776,3 +2777,19 @@ year = {1967}
|
||||
title = {Genetic Algorithms in Search, Optimization, and Machine Learning},
|
||||
year = 1989
|
||||
}
|
||||
|
||||
@article{Ebner-17,
|
||||
author={F. Ebner and T. Fetzer and F. Deinzer and M. Grzegorzek},
|
||||
journal={{IMWUT}},
|
||||
title={{On Wi-Fi Optimizations for Smartphone-based Indoor Localization}},
|
||||
year={2017, submitted},
|
||||
}
|
||||
|
||||
@inproceedings{Fetzer-17,
|
||||
author={T. Fetzer and F. Ebner and F. Deinzer and M. Grzegorzek},
|
||||
booktitle={2017 International Conference on Indoor Positioning and Indoor Navigation (IPIN)},
|
||||
title={{Recovering from Sample Impoverishment in Context of Indoor Localisation}},
|
||||
year={2017, submitted},
|
||||
%pages={1-8},
|
||||
%notes={},
|
||||
}
|
||||
|
||||
21
tex/make.sh
21
tex/make.sh
@@ -3,14 +3,17 @@
|
||||
#PATH=$PATH:/mnt/data/texlive/bin/x86_64-linux/
|
||||
PATH=$PATH:/mnt/vm/programme/texlive/bin/x86_64-linux/
|
||||
|
||||
latex bare_conf.tex
|
||||
#latex bare_conf.tex
|
||||
#bibtex bare_conf
|
||||
#latex bare_conf.tex
|
||||
#latex bare_conf.tex
|
||||
#dvips bare_conf.dvi
|
||||
#ps2pdf14 bare_conf.ps
|
||||
|
||||
pdflatex -shell-escape bare_conf.tex
|
||||
bibtex bare_conf
|
||||
latex bare_conf.tex
|
||||
latex bare_conf.tex
|
||||
pdflatex -shell-escape bare_conf.tex
|
||||
pdflatex -shell-escape bare_conf.tex
|
||||
|
||||
dvips bare_conf.dvi
|
||||
|
||||
ps2pdf14 bare_conf.ps
|
||||
|
||||
okular bare_conf.pdf&
|
||||
atril bare_conf.pdf&
|
||||
#okular bare_conf.pdf&
|
||||
#atril bare_conf.pdf&
|
||||
|
||||
Reference in New Issue
Block a user