| 摘要 |
A GNSS receiver and antenna system transmits signals from an antenna stru cture to a remote GNSS receiver and includes a digital communications subsys tem that utilizes a high speed digital communications conductor. The transmi ssions are digital signals that preserve GNSS satellite signal frequency and /or carrier and code phase information. The system may transmit digital sign als corresponding to GNSS signals such as GPS, GLONAS, Galileo and Compass s atellite signals. In addition, the system may transmit, over the same digita l communications conductor in appropriately formatted digital signals, rangi ng signals from ground-based transmitters or other satellites, differential GNSS correction signals from beacons or base GPS receivers, and/or signals f rom transmitting or co-located sensors, such as inertial sensors, temperatur e sensors and so forth. The digital signals include in headers or payload re lative timing and carrier and code phase information and, as appropriate, in formation that identifies the signals by source or type, such as information that identifies the frequencies or the antennas or antenna elements providi ng the respective signals.
|
