System and method for the mitigation of multipath and the improvement of signal-to-noise ratios in time division multiple access(TDMA) location networks
US7652625B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 19, 2003 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Oct 23, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0848
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A positioning system that includes a plurality of chronologically synchronized Time Division Multiple Access (TDMA) Positioning-Unit Devices and a position receiver incorporating a TDMA Adaptive Directional Antenna Array is disclosed. The plurality of chronologically synchronized Positioning-Unit Devices, positioned at known locations, transmit positioning signals in a predetermined Time Division Multiple Access (TDMA) sequence, such that each Positioning-Unit Device has a unique transmission time slot. The TDMA Adaptive Directional Antenna Array is configured to consecutively steer a directional receive antenna in spatial synchronization with the plurality of Time Division Multiple Access (TDMA) Positioning-Unit Device transmissions, such that the directional receive antenna is oriented toward the currently transmitting Positioning-Unit Device, or the directional receive antenna is oriented toward the origin of the currently received positioning signal. The TDMA Adaptive Directional Antenna Array is controlled by a deterministic algorithm based on the knowledge of the Positioning-Unit Device locations, TDMA Adaptive Directional Antenna Array location, TDMA Adaptive Directional Ant…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.