Direction Finders Using Radio Waves TRIZ Cases

Mobile devices transmit relative position data instead of absolute GPS coordinates, reducing bandwidth consumption and enabling more frequent location updates.

A server computer estimates coarse geographic locations using cached location area codes from GPS-enabled devices.

Discriminating tracker system filters aberrant location samples using moving average velocity calculations.

Predicting RF noise patterns allows a GPS receiver to sample signals only during quiet periods, reducing power consumption and computing waste.

Requesting station transmits configuration messages to responding stations for orthogonal spread spectrum signal generation and time of flight determination.

A base station broadcasts RF signals using two-way time transfer to enhance position accuracy in areas with signal obstructions.

Passive receivers capture signal strength, time of arrival, and directional information for a location manager to calculate precise mobile station coordinates.

A modular collision warning apparatus separates analog and digital circuitry into distinct roof and cabin units connected by a flexible digital transmission line.

A pseudolite-based RTK system determines rover location using carrier phase measurements from stationary and moving reference stations.

Emergency vehicles transmit position statements via vehicle-to-vehicle communication, resolving late reaction times at intersections.

Calendar data matches indoor map identifiers to correct sensor divergence and maintain positioning accuracy in GNSS-denied areas.

Correlating sample arrays with calibrated patterns determines the line of bearing for IEEE 802.11 emitters in multipath environments.