Adaptive taper selection for beamforming
A satellite communication system includes a phased antenna array having a field of view (FoV) and configured to communicate with a plurality of cells in the FoV via a plurality of beams. Each of the plurality of beams is associated with one of the plurality of cells. A phased antenna array is configured to apply adaptive taper selection, based on both the satellite position (in relation to a satellite service beam) and its surrounding interference scenario.
1. A satellite communication system, comprising:
a phased antenna array having a field of view (FoV) and configured to communicate with devices in a plurality of cells in the FoV via a plurality of uplink beams, each of the plurality of uplink beams being associated with one of the plurality of cells; and
a satellite module in operative communication with the phased antenna array, the satellite module having a processing device configured to:
adaptively determine an uplink beam taper for each uplink beam of the plurality of uplink beams; and
distribute, to the phased antenna array, the uplink beam taper for each uplink beam of the plurality of uplink beams.
2. The satellite communication system of claim 1 , wherein the uplink beam taper is determined according to at least one of a service beam type or a relative position between the phased array antenna and at least one of the plurality of cells.
3. The satellite communication system of claim 1 , wherein the uplink beam taper is determined based on a distance between a target cell and a source of interference.
4. The satellite communication system of claim 3 , wherein the uplink beam taper is a Chebyshev taper.
5. The satellite communication system of claim 1 , where determination of the uplink beam taper is done independently for each uplink beam.
6. The satellite communication system of claim 1 , wherein the processing device is configured to select one of a Chebyshev taper, a Kaiser taper or a rectangular taper for a given one of the plurality of uplink beams based on a relative position of a corresponding one of the plurality of cells within the FoV.
7. The satellite communication system of claim 1 , wherein the processing device is configured to select either a Chebyshev taper, a Kaiser taper or a rectangular taper for a given one of the plurality of uplink beams based on an interference suppression criterion.
8. The satellite communication system of claim 7 , wherein taper selection by the processing device for a given one of the plurality of uplink beams is further based on a relative position of a corresponding one of the plurality of cells within the FoV.
9. A satellite communication system, comprising:
a phased antenna array having a plurality of antenna elements, a field of view (FoV) and an aperture, and configured to communicate with devices in a plurality of cells in the FoV via a plurality of downlink beams, each of the plurality of downlink beams being associated with one of the plurality of cells; and
a satellite module in operative communication with the phased antenna array, the satellite module having a processing device configured to:
select a downlink sub-aperture for each of the plurality of downlink beams, each selected downlink sub-aperture being a subset of antenna elements of the plurality of antenna elements in the phased antenna array;
determine a downlink beam taper for each downlink beam of the plurality of downlink beams; and
distribute, to the phased antenna array, the selected downlink sub-aperture and the downlink beam taper for each downlink beam of the plurality of downlink beams.
10. The satellite communication system of claim 9 , wherein the downlink beam taper is determined according to at least one of a service beam type or a relative position between the phased array antenna and at least one of the plurality of cells.
11. The communication system of claim 9 , wherein the phased antenna array is configured to apply each downlink sub-aperture to reduce a peak-to-average-power ratio (PAPR).
12. The communication system of claim 9 , wherein the downlink beam taper is determined based on a distance between a target cell and the phased antenna array.
13. The satellite communication system of claim 9 , where determination of the downlink beam taper is done independently for each downlink beam.
14. The satellite communication system of claim 9 , wherein the processing device is configured to select one of a Chebyshev taper, a Kaiser taper or a rectangular taper for a given one of the plurality of downlink beams based on a relative position of a corresponding one of the plurality of cells within the FoV.
15. The satellite communication system of claim 14 , wherein selection of either the Chebyshev taper or the Kaiser tape is done in conjunction with downlink sub-aperture selection.
16. A satellite communication system, comprising:
a phased antenna array having a plurality of antenna elements, a field of view (FoV) and an aperture, and configured to communicate with devices a plurality of cells in the FoV via a plurality of uplink beams and a plurality of downlink beams, each of the plurality of uplink beams and each of the plurality of downlink beams being associated with one of the plurality of cells; and
a satellite module in operative communication with the phased antenna array, the satellite module having a processing device configured to:
determine an uplink beam taper for each uplink beam of the plurality of uplink beams according to a first set of criteria;
determine a downlink beam taper for each downlink beam of the plurality of downlink beams according to a second set of criteria; and
distribute, to the phased array, the uplink beam taper for each uplink beam and the downlink taper for each downlink beam.
17. The satellite communication system of claim 16 , wherein:
the first set of criteria includes at least one of a service beam type for that uplink beam or a relative position between the phased array antenna and at least one of the plurality of cells; and
the second set of criteria includes at least one of the service beam type for that downlink beam or a relative position between the phased array antenna and at least one of the plurality of cells.
18. The satellite communication system of claim 17 , wherein the second set of criteria further includes reduction of a peak-to-average-power ratio (PAPR).
19. The satellite communication system of claim 16 , wherein the processing device is configured to:
select one of a Chebyshev uplink taper, a Kaiser uplink taper or a rectangular uplink taper for a given one of the plurality of uplink beams based on a relative position of a corresponding one of the plurality of cells within the FoV; and
select one of a Chebyshev downlink taper, a Kaiser downlink taper or a rectangular downlink taper for a given one of the plurality of downlink beams based on a relative position of a corresponding one of the plurality of cells within the FoV.
20. The satellite communication system of claim 16 , wherein:
the processing device is further configured to select a downlink sub-aperture for each of the plurality of downlink beams; and
the downlink beam taper is based on the downlink sub-aperture for each downlink beam.