Ultra-wide band antenna arrays and related methods in personal emergency response systems
US9568595B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2016 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Jan 28, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/0245
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A non-wearable Personal Emergency Response System (PERS) architecture is provided, implementing RF interferometry using synthetic aperture antenna arrays to derive ultra-wideband echo signals which are analyzed and then processed by a two-stage human state classifier and abnormal states pattern recognition. Systems and methods transmit ultra-wide band radio frequency signals at, and receive echo signals from, the environment, process the received echo signals to yield a range-bin-based slow signal that is spatio-temporally characterized over multiple spatial range bins and multiple temporal sub-frames, respectively, and derive from the slow signal multiple characteristics of human(s) in the environment. The reception antennas may be arranged in several linear baselines, implement virtual displacements, and may be set into multiple communicating sub-arrays. The decision process is carried out based on the instantaneous human state (local decision) followed by abnormal states patterns recognition (global decision).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.