Radar device and method for coding a radar device

• US 6,693,582 B2
• Filed: 03/26/2003
• Issued: 02/17/2004
• Est. Priority Date: 01/31/2001
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Brosche, Thomas, Steinlechner, Siegbert
• Primary Examiner(s): Sotomayor, John B.
• Application Number:
  US10/240,512
• Publication Number:
  US 20030151542A1
• Time in Patent Office: 328 Days
• Field of Search: 342/70, 342/71, 342/72, 342/118, 342/127, 342/128, 342/130, 342/131, 342/134, 342/135, 342/145, 342/159, 342/189, 342/195, 342/201, 342/202, 342/203
• US Class Current: 342/70
• CPC Class Codes: G01S 13/222 using random or pseudorandom pulse repetition frequency
• CPC Class Codes: G01S 13/288 phase modulated
• CPC Class Codes: G01S 7/023 Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36
• CPC Class Codes: G01S 7/0234 Avoidance by code multiplex
• CPC Class Codes: G01S 7/0235 Avoidance by time multiplex

Abstract

A radar system having an arrangement for producing a code, an arrangement for modulating a transmission signal in a transmit branch, using the code, an arrangement for delaying the code, an arrangement for modulating a signal in a receive branch, using the delayed code, and an arrangement for mixing a reference signal with a receiving signal, the modulation of one of the signals being performed by an amplitude modulation (ASK; “amplitude shift keying”) and the modulation of the other signal by a phase modulation (PSK; “phase shift keying”). Furthermore, a radar system is proposed in which blanking of phase transitions is provided. Also described are methods which may advantageously be carried out, using the radar systems described herein.

Claims

1. A radar system, comprising:

an arrangement for generating a code;

an arrangement for modulating a transmitting signal in a transmit branch using the code;

an arrangement for delaying the code;

an arrangement for modulating a signal in a receive branch using the delayed code;

an arrangement for mixing a reference signal with a receiving signal;

an arrangement for modulating one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal by an amplitude modulation;

an arrangement for modulating another one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal by a phase modulation; and

an arrangement for blanking phase transitions.

5. The radar system as recited in claim 1, wherein:

the modulation of the transmitting signal is carried out by the amplitude modulation, and

the modulation of the signal in the receive branch is carried out by the phase modulation.

6. The radar system as recited in claim 1, wherein:

the modulation of the transmitting signal is carried out by the phase modulation, and

the modulation of the signal in the receive branch is carried out by the amplitude modulation.

7. The radar system as recited in claim 1, wherein:

the arrangement for mixing the reference signal with the receiving signal emits an output signal to a lowpass filter.

8. The radar system as recited in claim 1, wherein:

the arrangement for delaying the code includes a digital arrangement for controlling the delaying.

9. The radar system as recited in claim 1, wherein:

the arrangement for delaying the code includes a circuit arrangement for controlling the delaying.

10. The radar system as recited in claim 1, wherein:

the code is an n-bit pseudo-noise (PN) code, and

the arrangement for generating and the arrangement for delaying include n-bit counters having combinatorial linkage of counter outputs.

11. The radar system as recited in claim 1, wherein:

the receive branch is subdivided into a plurality of channels that use a plurality of PN codes for modulating, and

a plurality of lowpass filters is provided for a further processing of one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal.

2. A radar system, comprising:

an arrangement for generating a code;

an arrangement for modulating a transmitting signal in a transmit branch using the code;

an arrangement for delaying the code;

an arrangement for modulating a signal in a receive branch using the delayed code;

an arrangement for mixing a reference signal with a receiving signal;

an arrangement for modulating one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal by a phase modulation; and

an arrangement for blanking phase transitions.

3. The radar system as recited in claim 2, wherein:

the arrangement for blanking the phase transitions includes an arrangement for pulse shaping and a switch connected in series to the arrangement for modulating.

4. The radar system as recited in claim 2, wherein:

the code is a pseudo-noise code.

12. A method for coding a radar system, comprising:

generating a code;

modulating a transmitting signal in a transmit branch using the code;

delaying the code according to a delay;

modulating a signal in a receive branch using the delayed code;

mixing a reference signal with a receiving signal to produce a mixed signal;

modulating one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal by an amplitude modulation;

modulating another one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal by a phase modulation; and

blanking phase transitions.

15. The method as recited in claim 12, wherein:

the modulation of the transmission signal is carried out by the amplitude modulation, and

the modulation of the signal in the receive branch is carried out by the phase modulation.

16. The method as recited in claim 12, wherein:

the modulation of the transmission signal is carried out by the phase modulation, and

the modulation of the signal in the receive branch is carried out by the amplitude modulation.

17. The method as recited in claim 12, wherein:

the mixed signal is emitted to a lowpass filter.

18. The method as recited in claim 12, wherein:

the delay is controlled digitally.

19. The method as recited in claim 12, wherein:

the delay is controlled by a circuitry arrangement.

20. The method as recited in claim 12, wherein:

the code is an n-bit PN code, and

the n-bit PN code is generated and delayed by an n-bit counter having combinatorial linkage of counter outputs.

21. The method as recited in claim 12, wherein:

the receive branch is subdivided into a plurality of channels that use a plurality of PN codes for modulating, and

after one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal is modulated to produce a modulated signal, the modulated signal is processed further by a plurality of lowpass filters.

13. A method for coding a radar system, comprising:

generating a code;

modulating a transmitting signal in a transmit branch using the code;

delaying the code according to a delay;

modulating a signal in a receive branch using the delayed code;

mixing a reference signal with a receiving signal to produce a mixed signal;

modulating one of the transmitting signal, the signal in the receive branch, the reference signal, and the receiving signal by a phase modulation; and

blanking phase transitions.

14. The method as recited in claim 13, wherein the code is a pseudo-noise code (PN code).