Direction Finders Using Radio Waves TRIZ Cases

Passive radio frequency signal mediators collect Layer 2 measurement data to determine precise indoor locations, overcoming GPS signal unavailability.

Segmenting direct and multipath signal components to improve positioning accuracy while reducing false alerts from environmental reflections.

A very far-field communication system relays tag queries through mobile devices to extend wireless range.

Antenna gain tables compensate for limited signal data in two-point positioning, resolving the trade-off between cost and precision without complex hardware.

Estimates mobile station velocity using time-frequency signal processing and geographical databases for precise location tracking.

Remote autocorrelation extracts timing parameters from electromagnetic signals, reducing data transmission volume while maintaining location accuracy.

Local devices measure received signal strength from target access points to calculate positions via trilateration, eliminating reliance on external databases.

Selecting beacons with overlapping coverage areas reduces computational complexity while maintaining accurate location estimation.

Mobile location measuring units detect wireless device signals to determine positions via time difference of arrival and angle of arrival measurements.

A transmitter area determination system segments signal strength data into distinct time periods to estimate location and define presence areas.