System and method of generating a radio frequency signal
AssigneeIndra Australia Pty Limited
InventorsDavid Le Comte, Andrew Cain
Life of this patent
Estimating the term…
Abstract
A system and method of generating a radio frequency signal adapted for allowing a receiving device to calculate a navigational indicator relative to a plurality of antennas. The system comprising a radio frequency generator unit for generating: a primary signal for driving at least one antenna of the plurality of antennas to provide a primary transmission; and an actively derived secondary signal to complement the primary signal for driving at least one other antenna of the plurality of antennas to provide, collectively with the primary transmission, the combined transmission, wherein the combined transmission, relative to the primary transmission only, provides a reduced observed distortion at the receiving device.
Claims18
A system configured to provide a combined transmission, the system comprising:
- a plurality of circumferentially-located antennas;
- a reference antenna located centrally to the plurality of antennas;
- and
- a radio frequency generator unit coupled to at least one of the plurality of circumferentially-located antennas, the radio frequency generator unit configured to:
- generate a primary signal for driving at least one antenna of the plurality of antennas to provide a primary transmission;
- apply the primary signal to at least one of the plurality of circumferentially-located antennas to transmit the primary transmission;
- generate a secondary signal actively-derived from the primary signal to compensate the primary signal and reduce, at least in part, an antenna radiation pattern distortion of the primary transmission;
- and
- apply the secondary signal to at least one other antenna of the plurality of circumferentially-located antennas adjacent to the at least one antenna to provide, collectively with the primary transmission, a combined transmission having a reduced observed distortion at a receiving device compared with an observed distortion of the primary transmission alone,
- wherein the combined transmission allows the receiving device to calculate a navigational indicator relative to the plurality of circumferentially-located antennas.
A system configured to provide a combined transmission, the system comprising:
- a plurality of circumferentially-located antennas;
- a reference antenna located centrally to the plurality of circumferentially-located antennas;
- and
- a radio frequency generator unit configured to:
- generate at least two primary signals;
- apply the at least two primary signals to at least two adjacent antennas of the plurality of circumferentially-located antennas to provide a primary transmission;
- generate at least two secondary signals which are actively-derived from the at least two primary signals;
- and
- apply the at least two secondary signals to at least two other antennas of the plurality of circumferentially-located antennas to provide, collectively with the primary transmission, a combined transmission,
- wherein the at least two adjacent antennas are disposed between the at least two other antennas,
- wherein the combined transmission is configured to allow a receiving device to calculate a navigational indicator relative to the plurality of antennas,
- wherein the at least two secondary signals are configured to compensate the at least two primary signals to, at least in part, reduce antenna radiation pattern distortion of the primary transmission, and
- wherein the combined transmission provides a reduced observed distortion at the receiving device as compared with an observed distortion of the primary transmission alone.
Dependencies are inferred from the claim text.