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FM Continuous Wave Vehicle Radar System

A frequency modulation continuous wave and radar system technology, applied in the field of vehicle radar systems, can solve the problems of frequency reduction, interference, etc., and achieve the effect of reducing noise level and reducing loop bandwidth

Active Publication Date: 2021-05-07
VEONEER SWEDEN AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, such a single step can lead to an overshoot effect, where the frequency initially decreases to less than the first low frequency
This effect is undesirable due to frequency limitation requirements and may generate interference with other frequency bands

Method used

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  • FM Continuous Wave Vehicle Radar System
  • FM Continuous Wave Vehicle Radar System
  • FM Continuous Wave Vehicle Radar System

Examples

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Embodiment Construction

[0026] figure 1 Schematically shows a top view of a vehicle 1 configured to drive on a road 2 in a direction D, wherein the vehicle 1 comprises a vehicle radar system 3 which is configured in a previously known manner by transmitting a signal 4 and receiving The signal 5 is reflected and the Doppler effect is used to distinguish and / or resolve individual objects from the surrounding environment. The vehicle radar system 3 is configured to provide an azimuth of a possible object 6 by simultaneously sampling and analyzing the phase and amplitude of the received signal 5 .

[0027] Also refer to figure 2 , the vehicle radar system 3 comprises transceiver means 7 configured for generating and transmitting scanning signals in the form of FMCW (Frequency Modulated Continuous Wave) chirp signals 4 of a previously known kind, and for receiving reflected signals 5 . The transceiver device 7 includes a transmitter 8 , a receiver 9 , an analog-to-digital converter (ADC) device 10 , a ...

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Abstract

The invention relates to a vehicle radar system (3) comprising a signal generator (13) generating at least one FMCW chirp signal (4) having a first frequency (f 开始 ) and the second frequency (f 终止 Multiple frequency ramps (r) extending between ). At the second frequency (f 终止 ), use the frequency control signal (31) corresponding to the desired frequency (39) to control the signal generator (13) to start output with output frequency (F 输出 ) output signal (4) for starting said further frequency ramp-up (r'). Said initial desired frequency portion (39a) is derived from said second frequency (f 终止 ) extending to intermediate frequencies (f 中间 ), the intermediate frequency (f 中间 ) at the first frequency (f 开始 ) and the second frequency (f 终止 ), said additional desired frequency portion (39b) from said intermediate frequency (f 中间 ) extends to the first frequency (f 开始 ). The duration of the initial desired frequency portion (39a) is lower than the duration of the further desired frequency portion (39b). The invention also relates to a corresponding method.

Description

technical field [0001] The present invention relates to vehicular radar systems that generate and deliver a continuous frequency ramp. When the ramp-up reaches the second high frequency, the frequency is restored to the first low frequency. Background technique [0002] Many vehicle radar systems include a radar transceiver for generating a so-called chirp signal which is transmitted, reflected and received by a suitable antenna included in the radar system. The chirp signal is an FMCW (Frequency Modulated Continuous Wave) signal with a certain amplitude, in which the frequency continuously rises and falls between two values. Therefore, the chirp signal is a frequency that ramps up from the first low frequency The form of a continuous sine that changes to the second highest frequency. Alternatively, ramping may be a change in frequency from a first high frequency to a second low frequency. The magnitude of the change in frequency from start to finish may be, for example, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/931
CPCG01S13/931G01S7/354G01S13/343G01S13/584G01S2013/93275G01S2013/93271G01S7/356
Inventor 乔纳森·莫斯
Owner VEONEER SWEDEN AB