45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
/*
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* This file is part of the Owl Positioning System (OwlPS) project.
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* It is subject to the copyright notice and license terms in the
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* COPYRIGHT.t2t file found in the top-level directory of this
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* distribution and at
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* https://code.lm7.fr/mcy/owlps/src/master/COPYRIGHT.t2t
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* No part of the OwlPS Project, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms
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* contained in the COPYRIGHT.t2t file; the COPYRIGHT.t2t file must be
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* distributed along with this file, either separately or by replacing
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* this notice by the COPYRIGHT.t2t file's contents.
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*/
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#include "fbcm.hh"
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#include "stock.hh"
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#include "configuration.hh"
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Result FBCM::compute(const Request &_request)
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{
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// If the autocalibration is activated, we have to regenerate the
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// Friis indexes each time we calculate a position
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if (Configuration::autocalibration_enabled())
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Stock::update_all_friis_indexes() ;
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return TrilaterationAlgorithm::compute(_request) ;
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}
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float FBCM::estimate_distance(const Measurement &measurement)
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{
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double constant_term = make_constant_term(measurement) ;
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float average_dbm = measurement.get_average_dbm() ;
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const CapturePoint *cp = measurement.get_cp() ;
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return pow(10, (constant_term - average_dbm) /
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(10 * friis_index(cp))) ;
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}
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inline float FBCM::friis_index(const CapturePoint *const cp) const
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{
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return cp->get_friis_index() ;
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}
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