FrankE
a2c9e575a2
- worked on about everything - grid walker using plugable modules - wifi models - new distributions - worked on geometric data-structures - added typesafe timestamps - worked on grid-building - added sensor-classes - added sensor analysis (step-detection, turn-detection) - offline data reader - many test-cases
66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
#ifndef WIFIMODELLOGDISTCEILING_H
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#define WIFIMODELLOGDISTCEILING_H
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#include "../../../floorplan/v2/Floorplan.h"
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#include "WiFiModel.h"
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#include "LogDistanceModel.h"
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/**
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* signal-strength estimation using log-distance model
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* including ceilings between AP and position
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*/
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class WiFiModelLogDistCeiling : public WiFiModel {
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private:
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float txp; // sending power (-40)
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float exp; // path-loss-exponent (~2.0 - 4.0)
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float waf; // attenuation per ceiling/floor (~-8.0)
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/** position (height) of all ceilings (in meter) */
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std::vector<float> ceilingsAtHeight_m;
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public:
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/** ctor */
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WiFiModelLogDistCeiling(const float txp, const float exp, const float waf, const Floorplan::IndoorMap* map) : txp(txp), exp(exp), waf(waf) {
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Assert::isTrue(waf <= 0, "WAF must be a negative number!");
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// position of all ceilings
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for (Floorplan::Floor* f : map->floors) {
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ceilingsAtHeight_m.push_back(f->atHeight);
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}
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}
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/** get the given access-point's RSSI at the provided location */
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float getRSSI(const LocatedAccessPoint& ap, const Point3 p) override {
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const int numCeilings = numCeilingsBetween(ap.z, p.z);
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const float rssi = LogDistanceModel::distanceToRssi(txp, exp, ap.getDistance(p));
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return rssi + (numCeilings * waf);
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}
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private:
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/** get the number of ceilings between z1 and z2 */
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int numCeilingsBetween(const float z1, const float z2) const {
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int cnt = 0;
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const float zMin = std::min(z1, z2);
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const float zMax = std::max(z1, z2);
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for (float z : ceilingsAtHeight_m) {
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if (zMin < z && zMax > z) {++cnt;}
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}
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return cnt;
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}
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};
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#endif // WIFIMODELLOGDISTCEILING_H
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