Multidimensional beamforming device
First Claim
Patent Images
1. A sonar beamforming system, comprising in combination:
- a plurality of sensors disposed in a sensor array that provide array signals;
an integrated circuit beamforming device, coupled to the sensor array, the beamforming device including a plurality of programmable charge domain delay lines that generate delayed output signals from the array signals to form a representation of a region of interest from the delayed output signals, each programmable charge domain delay line coupled to a computation circuit to select a tap location, the tap location being programmable;
a memory coupled to the beamforming device; and
a controller coupled to the memory and the beamfomiing device to generate clock and control signals for the beamforming device.
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Abstract
A multidimensional beamforming device that performs consecutive one-dimensional operations. For example, beamsteering for a two-dimensional array can be include a projection of a beam onto each of the respective axes of the array. In such a device, a first beamforming processing element is used to form multiple beams for each array output along a given row. In a preferred embodiment, sequential output vectors from the first processing element are then applied to a transposing or corner turning memory and the data are reformatted such that all elements on a given column of the array are applied to a second beam forming processing element.
128 Citations
35 Claims
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1. A sonar beamforming system, comprising in combination:
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a plurality of sensors disposed in a sensor array that provide array signals;
an integrated circuit beamforming device, coupled to the sensor array, the beamforming device including a plurality of programmable charge domain delay lines that generate delayed output signals from the array signals to form a representation of a region of interest from the delayed output signals, each programmable charge domain delay line coupled to a computation circuit to select a tap location, the tap location being programmable;
a memory coupled to the beamforming device; and
a controller coupled to the memory and the beamfomiing device to generate clock and control signals for the beamforming device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
15.An electronically steerable sonar system comprising in combination: a sensor array including a first plurality of sensor elements;
an integrated circuit including a programmable tapped delay line device that receives signals from the sensor array and that generates delayed output signals to form a representation of a region of interest;
a tap selection circuit connected to the delay line device programmed to control tap selection;
a memory coupled to the programmable tapped delay line device; and
a controller connected to the tap selection circuit that controls programmed tap selection for the delay line device.
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- 15. The system of claim 15, wherein the sensor array comprises a plurality of independently controllable subarrays.
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23. A method for sonar beamforming comprising the steps of:
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obtaining array signals from a plurality of sensors disposed in a sensor array;
programming an integrated circuit beamforming device which includes a plurality of charge domain delay lines for generating delayed output signals from the array signals to form a representation of a region of interest from the delayed output signals; and
controlling a selection of a programmable tap location for each charge domain delay line.
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24. The method of claim 24, further comprising a step of:
transporting the delayed output signals generated by the beamforming device to form transposed delayed output signals such that a second beamforming device generates a representation of the region of interest based on the transposed delayed output signals. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A method for providing an electronically steerable sonar system comprising the steps of:
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obtaining array signals from a sensor array including a first plurality of sensor elements;
programming an integrated circuit including a programmable tapped delay line device that receives signals from the sensor array and that generates delayed output signals to form a representation of a region of interest; and
controlling a selection of a programmed tap location to the delay line device using a tap selection circuit.
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31. The method of claim 31, further comprising a step of:
transposing the delayed output signals generated by the programmable tapped delay line device to form transposed delayed output signals such that a second programmed tapped delay line device generates a representation of the region of interest based on the transposed delayed output signals. - View Dependent Claims (32, 33, 34, 35)
Specification