Receiver processor for adaptive windowing and high-resolution TOA determination in a multiple receiver target location system
US9854558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2015 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Aug 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W24/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides methods for a high-resolution active RTLS tag location determination system that provides for <1 ns TOA accuracy and resolution and significantly reduces the channel effects of multipath interference, even in low SNR applications. To accomplish these objectives, the present invention provides for an iterative and adaptive windowing function in each of the receivers of a receiver grid that captures multiple reflections of multiple transmissions from each of the associated target RTLS tags. The adaptive windowing function is used in conjunction with an asynchronous transmit and receive clock function that effectively increases resolution of TOA detection to levels less than the minimum detection window width associated with each of the receivers in the receiver grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.