46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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* This file is part of the Owl Positioning System (OwlPS).
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* OwlPS is a project of the University of Franche-Comté
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* (Université de Franche-Comté), France.
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*/
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#include "frbhmbasic.hh"
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Result FRBHMBasic::compute(const Request &_request)
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{
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request = &_request ;
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// Select the closest point in SS
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closest_in_ss = &select_point(_request) ;
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compute_ap_distance_circles() ;
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Point3D position(multilaterate_2d(closest_in_ss->get_z())) ;
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return Result(request, name, position) ;
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}
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/* TODO:
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* It is ugly to duplicate this function from FBCM. We should find a
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* trick to do it prettier. The thing is that FBCM::estimate_distance()
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* will not call FRBHMBasic::friis_index() but FBCM::friis_index(),
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* which is wrong in our case.
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*/
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float FRBHMBasic::estimate_distance(const Measurement &measurement)
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{
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double constant_term = make_constant_term(measurement) ;
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const float &average_ss = measurement.get_average_ss() ;
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const AccessPoint *ap = measurement.get_ap() ;
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return pow(10, (constant_term - average_ss) /
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(10 * friis_index(ap))) ;
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}
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inline float FRBHMBasic::friis_index(const AccessPoint *const ap) const
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{
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return closest_in_ss->friis_index_for_ap(ap->get_mac_addr()) ;
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}
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