Radar system operating method and radar system having improved range resolution by mutually delayed orthogonal codes

A radar system, orthogonal code technology, applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation and other directions, can solve problems such as distance resolution limitation of automotive radar system
CN111417866APending Publication Date: 2020-07-14IEE INT ELECTRONICS & ENG SA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
IEE INT ELECTRONICS & ENG SA
Publication Date
2020-07-14

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Abstract

A method of operating a modulated continuous-wave radar system at least comprises steps of transmitting (38), with a modulation frequency, a plurality of n modulated continuous radar waves that represent mutually orthogonal codes towards a scene with a potential object to be detected, wherein the transmitted modulated continuous radar waves of the plurality of modulated continuous radar waves areconsecutively transmitted with a constant time lag (tau) given by one nth of a period of the modulation frequency; digitally converting (44) a plurality of reflected and received radar signals with asampling rate (l / ts) that is equal to the modulation frequency; decoding (46) individual range information for each received radar signal; and determining (48) a range between the radar system and theobject on the basis of the decoded individual range information.
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Description

technical field

[0001] The present invention relates to a method of operating a modulated continuous wave radar system and an automotive continuous wave radar system operated by such a method. Background technique

[0002] In the field of automotive technology, it is known to employ radar technology, in particular continuous wave (CW) radar systems, in interior and exterior automotive applications for providing improved safety in several ways. Most commonly, automotive radar systems operate in the range of about 24 GHz or about 77 GHz on the radar carrier frequency. Many automotive radar system applications (for example, parking assistance systems or seat occupant detection systems that exploit the breathing motion of passengers) require high range resolution to provide precise information about objects that may be present in the near field of the radar system. In such applications, the range resolution of an automotive radar system may be limited by the sampling rate of th...

Claims

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