Method for transmitting pilot symbols
US11973619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2019 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Nov 18, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0204
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of transmitting, by a first device, pilot symbols to allow a second device to estimate a transmission channel between the first and second devices. The first device has a first antenna that is active in transmission and a second antenna that is passive in transmission. The method includes: transmitting, by the first active antenna, a signal conveying pilot symbols associated with the first active antenna, and during which the second passive antenna is set to a transparency impedance to obtain a level of signal backscattered by the second passive antenna less than a first threshold; and transmitting by the first active antenna a signal conveying pilot symbols associated with the second passive antenna, and during which the second passive antenna is set to a scattering impedance to obtain a level of signal backscattered by the second passive antenna greater than a second threshold greater than the first threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.