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US 11,081,811 B2Granted
Transmitter
AssigneeHitachi, Ltd.
InventorKen Takei
Life of this patent
Estimating the term…
Abstract
A controller of a transmitter outputs cyclically different digital data to equivalent transmission circuits, that is, RF circuits to generate a rotation polarized wave.
Claims20
A transmitter comprising:
- a first transmission circuit and a second transmission circuit having at least one common circuit;
- and
- a controller configured to:
- generate first digital data and
- output the first digital data to the first transmission circuit, and
- generate second digital data different from the first digital data and
- output the second digital data to the second transmission circuit, wherein a pair of antennas are arranged to transmit outputs of the first transmission circuit and the second transmission circuit, the pair of antennas spatially orthogonal to each other, to generate a radio wave having a polarized wave rotating orthogonally to a propagation direction,
- wherein the controller is configured to generate digital data as the second digital data, having a part cyclically different from the first digital data,
- the controller is configured to generate the first digital data and the second digital data, having sequential bit strings as the digital data in which mutually coincident bits and inverted bits are alternately arranged repeatedly for every other bit.
6 more elements
A transmitter comprising:
- a first transmission circuit and a second transmission circuit having at least one common circuit;
- and
- a controller configured to:
- generate first digital data and
- output the first digital data to the first transmission circuit, and
- generate second digital data different from the first digital data and
- output the second digital data to the second transmission circuit, wherein a pair of antennas are arranged to transmit outputs of the first transmission circuit and the second transmission circuit, the pair of antennas spatially orthogonal to each other, to generate a radio wave having a polarized wave rotating orthogonally to a propagation direction,
- wherein:
- the controller is configure to divide each of a pair of sequential bit strings including an information signal into unit bit groups each with a fixed number of bits;
- and
- the controller is configured to output a pair of different signals derived from diffusing the respective unit bit groups with partially different pair of codes to the first transmission circuit and the second transmission circuit as the first digital data and the second digital data, respectively via a delay circuit.
8 more elements
A transmitter comprising:
- a first transmission circuit and a second transmission circuit having at least one common circuit;
- and
- a controller configured to:
- generate first digital data, a plurality of first bits being arranged sequentially in the first digital data, and
- output the first digital data to the first transmission circuit, and
- generate second digital data different from the first digital data, a plurality of second bits being arranged sequentially in the second digital data, and
- output the second digital data to the second transmission circuit, wherein a pair or antennas is arranged to transmit outputs of the first transmission circuit and the second transmission circuit, the pair of antennas spatially orthogonal to each other, to generate a radio wave having a polarized wave rotating orthogonally to a propagation direction,
- wherein the controller is further configured to generate digital data as the second digital data, having a part cyclically different from the first digital data,
- wherein the plurality of second bits are partially inverted by inverting the corresponding first bits,
- wherein a total number of the second bits is equal to a total number of the first bits.
7 more elements
Dependencies are inferred from the claim text.