Direction Finders Using Radio Waves TRIZ Cases

Received position messages let a navigation terminal set accurate destination coordinates when users do not know the address or exact location.

Angle-dependent attenuation between antennas enables accurate RF direction finding and wireless device location without costly GPS or RFID.

Real-time UAV supervision combines online flight restrictions with offline flight certificates to monitor small drones without heavy onboard hardware.

Integrated light-fixture sensors combine BLE, Zigbee, and occupancy sensing to improve indoor object tracking through obstacles while cutting traffic.

AIS broadcasts from nearby ships combined with sonar bearings let a submerged vehicle fix its position without surfacing or inertial drift.

Blind cyclostationary correlation estimates Doppler frequency under noise, interference, and fading without pilot symbols, improving mobile speed estimation.

Real-time SNR estimation lets a GPS receiver adjust integration time and bandwidth to maintain stable tracking across weak and strong signals.

A decoupled angle-delay estimation approach resolves overlapping paths in wideband multi-antenna systems with lower complexity and accurate DoA-ToA pairing.

By overlaying stitched millimeter-wave images on an optical view, this case enables remote concealed weapon detection without contact or x-rays.

Signal strength and distance information trigger frequency changes that balance auditory experience with effective distance in orientation measurement.

Paired locator devices use GNSS and illuminated directional LEDs to track peers in crowded areas without constant phone use.

A geographical boundary tracking system sequences position fix tests by increasing mathematical complexity to determine asset entry and exit events.

A portable unit with a pressure sensor determines altitude by comparing current air pressure against a stored reference value.

Signal strength ratios enable accurate mobile unit localization by automatically updating calibration values, eliminating complex manual procedures.

Asynchronous pulse detection determines angular position without expensive synchronization circuitry, reducing reflection interference.

A terminal calculates location coordinates by measuring phase differences between carrier signals from multiple base stations.

A wireless orientation system detects device direction by analyzing signal shadow fading patterns during rotation.

Room devices transmit position data while correlating optical and inertial motion sensors to locate mobile devices without compromising user privacy.

An in-vehicle communication system controls measuring signal intensity to a predetermined value for accurate relative distance detection.

Dynamic benchmarking corrects timing errors and signal density biases in fingerprint maps, maintaining positioning accuracy over time.

A location cache stores reference signal data on a device to determine position locally, reducing bandwidth consumption during indoor navigation.

Stationary radio frequency elements triangulate three-dimensional positions, enabling accurate location tracking in enclosed structures where GPS signals fail.

A hybrid navigation system combines military GPS with a low-frequency spread-spectrum Theater Positioning System to deliver rapid positioning fixes.

A vehicle-to-vehicle communication filtering system evaluates time-to-collision status to assign an attentive factor for selective message processing.

A zone-based UWB location system uses shared receivers and common clock sources to determine object positions with high precision.

Wireless access points triangulate employee positions to assign warehouse tasks, resolving inefficiencies from static zone-based allocation.

A localization system compares electromagnetic properties of radio signals against reference paths to determine position without pre-existing maps.

A vertical motion detector uses lag function residuals to identify aircraft altitude changes.

A tightly coupled sensor fusion algorithm estimates six-degree-of-freedom position and orientation using ultra-wideband and inertial measurements.

Weighted least-squares estimation determines emitter location using asynchronous TDOA and FDOA measurements.

A tunable local oscillator spans a wide frequency range to support multiple bands, reducing component duplication and device complexity.

Cluster analysis identifies main data groups to compute optimal emitter coordinates, reducing wild point solutions in single-ship geolocation.

Ground transmitters generate individual clock models from satellite signals to enable precise rover positioning without base stations.

Wave generators emit omni-directional and directional waves sensed by servers to calculate position angles, eliminating manual database update errors.

A frequency-hopping tracking system computes phase differences across multiple carrier signals to determine transmitter position coordinates.

A geographic positioning system uses cell tower Doppler frequency shifts to determine receiver location coordinates.

Normalized received power ratios from distributed sensors determine transmitter locations, resolving accuracy and speed trade-offs in complex environments.

Automatic calibration between sensing points reduces network traffic and construction costs while maintaining high location accuracy for moving objects.

A cone coordinate system calculates a geometric model from aircraft attitude and multilateration data to determine target position.

Sensor signal processing unit manages RF generator phase and frequency using external reference inputs.

A wireless sensor grid measures distance via continuous wave phase detection to achieve sub-centimeter resolution.

A three-dimensional geolocation technique uses maximum signal to noise ratio selection on unmanned air vehicles to determine radio frequency emitter positions.

A detection system computes vehicle position by matching time domain transponder footprints to spatial geometry.

Dynamic beaconing rate reduces lag time while maintaining system capacity for multiple assets.

Identifying timing advance step changes determines precise location markers, resolving GPS signal obstruction during high-speed train drive testing.

A terrestrial-signal based exclusion zone compliance circuit blocks navigation output when a device enters restricted areas.

Mobile TDOA relocates two sensors to form algebraic equations, reducing the number of required sensors while maintaining position location accuracy.

Alert server notifies users of nearby contacts in unusual locations using historical confidence values.

A main board uses configurable pads to connect an encryption chip only when network locking is required.

A single moving signal collection platform estimates signal energy across a grid of locations using collected IQ data.

Mobile receivers detect rising signal strength trends to identify shielding flaws, discarding duplicate peaks to reduce false maintenance work orders.

Dempster-Shafer analysis resolves ELINT bearing ambiguity by fusing it with precise radar data, maintaining continuous object identity through motion gaps.