25 lines
547 B
C++
25 lines
547 B
C++
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#include "interlinknetworks.hh"
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#include "mobile.hh"
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using std::tr1::unordered_map ;
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float InterlinkNetworks::estimate_distance(const Measurement &measurement)
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{
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const AccessPoint &ap = *measurement.get_ap() ;
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assert(&ap) ;
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double constant_term =
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ap.get_trx_power() +
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ap.get_antenna_gain() +
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20 * log10(
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300000000.0 /
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ap.get_frequency() /
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(4 * M_PI)
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) +
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mobile->get_antenna_gain() ;
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const float &average_ss = measurement.get_average_ss() ;
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return pow(10, (constant_term - average_ss) / 35) ;
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}
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