Doppler-nulling traveling-wave antenna relays for high-speed vehicular communications
US8948690B2 · kind B2 · utility
171Cited by
6References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2011 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Nov 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna relay system for facilitating wireless communication between mobile terminals on a high-speed rail vehicle and stationary base stations with substantially reduced Doppler shift effects comprises matched traveling wave directional antennas mounted to a high-speed rail vehicle and positioned collinearly alongside the railway. Both antennas continually transmit and receive at a fixed angle relative to the motion of the train so as to circumvent the Doppler shift. The signal transmitted or received by the stationary antenna is conducted to a nearest node for communication with an access network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.