Radar system having a clock pulse generator integrated into a central control unit

Patent metadata

Field	Value
Publication number	US-11733365-B2
Application number	US-201816765466-A
Country	US
Kind code	B2
Filing date	Nov 8, 2018
Priority date	Jan 11, 2018
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A radar system for a vehicle. The radar system has at least one central control unit for transmitting data and for processing received data, at least one radar sensor head, which is set apart from the central control unit and has at least one transmitting antenna for generating and at least one receiving antenna for receiving radar waves, and having at least one data line between the at least one central control unit and the at least one radar sensor head, with the at least one central control unit having a clock pulse generator for generating a reference frequency and the reference frequency being transmittable via the at least one data line to the at least one radar sensor head.

First claim

What is claimed is:

1. A radar system for a vehicle, the radar system comprising:
a central control unit;
a plurality of radar sensor heads which each (a) is set apart from the central control unit and (b) includes a transmitting antenna for generating radar waves, a frequency synthesizer, a receiving antenna for receiving radar waves, which are reflections of the generated radar waves, and an analog-digital converter to convert the received radar waves into digital measuring data; and
at least one data line between the control unit and the plurality of radar sensor heads, wherein:
the central control unit (a) has a clock pulse generator configured to generate a reference frequency and (b) is configured to transmit the reference frequency via the at least one data line to each of the plurality of radar sensor heads;
the respective frequency synthesizers of each of the plurality of radar sensor heads is configured to implement the reference frequency transmitted by the central control unit to generate a carrier frequency of the generated radar waves of the respective radar sensor heads, wherein the radar system ensures that the data transmitted via the at least one data line are transmitted at a data rate of a number of bits per second that is higher than a value of hertz of the generated carrier frequency of the generated radar waves;
the plurality of radar sensor heads are configured to transmit, over the at least one data line, the digital measuring data generated by the respective analog-digital converters to the central control unit; and
the central control unit is configured to process the digital measuring data received from the plurality of radar sensor heads in time synchronization with one another.

2. The radar system as recited in claim 1 , wherein the reference frequency generated by the clock pulse generator is variably adjustable.

3. The radar system as recited in claim 1 , wherein the digital measuring data is marked by at least one time datum.

4. The radar system as recited in claim 3 , wherein each of the plurality of radar sensor heads includes a respective time and control device configured to generate the at least one time datum.

5. The radar system as recited in claim 1 , wherein the frequency synthesizers each has an oscillator for a supply of a frequency.

6. The radar system as recited in claim 5 , wherein the frequency supplied by the oscillator is superposed by the reference frequency generated by the clock pulse generator of the central control unit.

7. The radar system as recited in claim 1 , wherein the frequency synthesizers of the plurality of radar sensor heads are synchronized with one another by the transmission of the reference frequency from the central control unit to the plurality of radar sensor heads.

8. The radar system as recited in claim 1 , wherein the central control unit has at least one processor configured to process received data and at least one memory for at least intermittent storage of data.

Assignees

• Bosch Gmbh Robert

Inventors

• Mayer Marcel
• Schoor Michael

Classifications

• G01S13/34 Primary

  using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal · CPC title

• G01S7/003

  Transmission of data between radar, sonar or lidar systems and remote stations · CPC title

• G01S7/03 Primary

  Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver · CPC title

• G01S7/35

  Details of non-pulse systems · CPC title

• G01S13/931

  of land vehicles · CPC title