Pulse-radar method and pulse-radar sensor and system
AssigneeRobert Bosch GmbH
InventorKarl-Heinz Richter
Life of this patent
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Abstract
In a pulse-radar method, in particular for motor vehicles, different time slots of a time frame are predefined. During one time slot, a radar sensor emits at least one radar pulse and receives the echo signal(s). During the remaining time slots the radar sensor monitors whether interference signals occur. On the basis of the interference signals occurring per time slot, a decision is made whether the radar sensor should continue its transmitting and receiving operation in the predefined time slot or should switch to one of the remaining time slots of the time frame. The method is suited for the concurrent operation of a plurality of radar sensors, without this causing interference.
Claims17
A pulse-radar method for motor vehicles, comprising:
- emitting by a radar sensor at least one radar pulse, and receiving by the radar sensor an echo signal during a predefined time slot of a time frame;
- monitoring, by the radar sensor during remaining time slots of the time frame, whether interference signals occur;
- determining whether the radar sensor should continue the transmitting and receiving operation in the predefined time slot or should switch to one of the remaining time slots of the time frame on the basis of the interference signals occurring per time slot;
- and
- after finding a time slot having little or no interference, beginning, by the radar sensor, a transmitting and receiving operation in a next time frame in a particular time slot that has a same time position within the next time frame as the time slot having little or no interference, and retaining the particular time slot for further measurements within a measuring cycle.
A pulse-radar sensor for motor vehicles, comprising:
- an arrangement for generating a carrier-frequency signal;
- an arrangement for deriving radar pulses from the carrier-frequency signal;
- an arrangement for selecting a predetermined time slot within a setpoint of time slots within a time frame for the emitting and receiving of the radar pulses;
- an arrangement for emitting the radar pulses and receiving radar pulses in the predetermined time slot;
- an arrangement for evaluating transmitted radar pulses for occurring interference in the predetermined time slot, the arrangement for evaluating including an arrangement for monitoring during remaining time slots of the time frame, whether interference signals occur;
- and
- an arrangement for changing to one of the remaining time slots for the transmitting and receiving of the radar pulses as a function of at least one signal emitted by the arrangement for evaluating the transmitted radar pulses.
A system, comprising:
- at least two pulse-radar sensors, each of the sensors including:
- an arrangement for generating a carrier-frequency signal;
- an arrangement for deriving radar pulses from the carrier-frequency signal;
- an arrangement for selecting a predetermined time slot within a setpoint of time slots within a time frame for the emitting and receiving of the radar pulses;
- an arrangement for emitting the radar pulses and receiving radar pulses in the predetermined time slot;
- an arrangement for evaluating transmitted radar pulses for occurring interference in the predetermined time slot, the arrangement for evaluating including an arrangement for monitoring during remaining time slots of the time frame, whether interference signals occur;
- and
- an arrangement for changing to one of the remaining time slots for the transmitting and receiving of the radar pulses as a function of at least one signal emitted by the arrangement for evaluating the transmitted radar pulses;
- wherein the radar sensors have a uniform time frame and a common control device, and each of the radar sensors being preconfigured to occupy a different time slot within the time frame.
Dependencies are inferred from the claim text.