Radar apparatus and radar method
AssigneePanasonic Holdings Corporation
InventorTakaaki Kishigami
Life of this patent
Estimating the term…
Abstract
A radar apparatus includes a radar transmitter that transmits a radar signal in a predetermined transmission cycle and a radar receiver that receives a reflection wave signal being a reflection of the radar signal on a target. The radar transmitter includes a phase rotation controller that randomly varies a pattern of a phase rotation every period corresponding to a plurality of transmission cycles, the pattern being to be applied to the radar signal within a period, and a transmission phase rotator that assigns a first phase rotation to the radar signal in accordance with the pattern. The radar receiver includes a reception phase rotator that assigns a second phase rotation in a direction opposite to a direction of the first phase rotation to the reflection wave signal in accordance with the pattern.
Claims10
A radar apparatus, comprising:
- a radar transmitter which, in operation, transmits radar signals in a plurality of transmission cycles;
- and
- a radar receiver which, in operation, receives reflection wave signals, the reflection wave signals being reflections of the radar signals on a target,
- wherein
- the radar transmitter includes
- a phase rotation controller which, in operation, assigns a unit phase rotation amount every Ne transmission cycles of the plurality of transmission cycles, and generates a phase rotation amount change signal that controls a phase rotation amount,
- Ne being an integer greater than one,
- the phase rotation amount of the phase rotation amount change signal being constant within each of the plurality of transmission cycles,
- the phase rotation amount of the phase rotation amount change signal being changed within the Ne transmission cycles according to the unit phase rotation amount and a predetermined pattern, and
- a transmission phase rotator which, in operation, assigns first phase rotations to the radar signals in accordance with the phase rotation amount change signal, and
- the radar receiver includes a reception phase rotator which, in operation, assigns second phase rotations, which are in directions opposite to directions of the first phase rotations, to the reflection wave signals in accordance with the phase rotation amount change signal.
A radar method, comprising:
- transmitting radar signals in a plurality of transmission cycles;
- and
- receiving reflection wave signals, the reflection wave signals being reflections of the radar signals on a target, wherein
- transmitting the radar signals includes:
- assigning a unit phase rotation amount every Ne transmission cycles of the plurality of transmission cycles, and
- generating a phase rotation amount change signal that controls a phase rotation amount, and
- assigning first phase rotations to the radar signals in accordance with the phase rotation amount change signal,
- Ne being an integer greater than one,
- the phase rotation amount of the phase rotation amount change signal being constant within each of the plurality of transmission cycles,
- the phase rotation amount of the phase rotation amount change signal being changed within the Ne transmission cycles according to the unit phase rotation amount and a predetermined pattern, and
- receiving the reflection wave signals includes:
- assigning second phase rotations, which are in directions opposite to directions of the first phase rotations, to the reflection wave signals in accordance with the phase rotation amount change signal.
A radar apparatus, comprising:
- a phase rotation controller which, in operation, assigns a unit phase rotation amount every Ne transmission cycles of a plurality of transmission cycles, and generates a phase rotation amount change signal that controls a phase rotation amount,
- Ne being an integer greater than one,
- the phase rotation amount of the phase rotation amount change signal being constant within each of the plurality of transmission cycles,
- the phase rotation amount of the phase rotation amount change signal being changed within the Ne transmission cycles according to the unit phase rotation amount and a predetermined pattern;
- a transmission phase rotator which, in operation, assigns first phase rotations to radar signals in accordance with the phase rotation amount change signal;
- and
- a radar transmitter which, in operation, transmits the radar signals assigned the first phase rotations in the plurality of transmission cycles.
Dependencies are inferred from the claim text.