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Scalable cascading radar system

A cascading and scaling technology, applied in transmission systems, radio transmission systems, radio wave measurement systems, etc.

Pending Publication Date: 2021-08-03
APTIV TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A common oscillator signal created from a combination of LO signals from multiple transceivers resolves settling time and reset time issues that prevent fast chirping waveforms when only one master transceiver is used

Method used

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  • Scalable cascading radar system
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Examples

Experimental program
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Effect test

example 1

[0084] Example 1. A scalable cascaded automotive radar system comprising: a plurality of transceivers, including a first transceiver and a second transceiver, each configured to output a respective local oscillator (LO) signal; a combiner configured be used to combine the respective LO signals output from the first transceiver and the respective LO signals output from the second transceiver into a common oscillator signal; the divider is configured to detect when the transceiver emits A common oscillator signal is distributed to each of the plurality of transceivers when the radar signal is reflected by the target's radar; and a radar control assembly is configured to output Information associated with radar reflections.

example 2

[0085] Example 2. The scalable cascaded automotive radar system of Example 1, further comprising an amplifier between the combiner and the divider configured to add a common oscillator signal to a plurality of transceivers for transmitting radar signals and detecting signals from The threshold level required for the radar reflection of the target.

example 3

[0086] Example 3. The scalable cascaded automotive radar system of Example 1 or 2, further comprising an antenna configured to transmit the radar signal and detect radar reflections.

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PUM

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Abstract

The techniques of this disclosure describe a scalable cascading automotive radar system that generates a common oscillator signal enabling consecutive chirps to be output more quickly and precisely than any previous cascading automotive radar system, thereby reducing phase noise and improving performance. The scalable cascading automotive radar system combines a respective LO signal output from at least two primary transceivers to distribute the combined signals as a common oscillator signal to be input to all the transceivers of the radar system. Thus, settling time and resetting times that otherwise occur between chirps generated by other automotive radar systems are reduced because the common oscillator signal is no longer constrained to a single LO signal from a single primary transceiver.

Description

Background technique [0001] Automotive radar systems collect information about the speed and distance of stationary and moving objects (eg, other vehicles, pedestrians, obstacles, other objects of interest) located outside the vehicle. Multiple-input multiple-output (MIMO) radar systems have multiple transceivers and are able to simultaneously transmit and process more independent and distinct signals, so large amounts of radar information can be collected quickly, suitable for collision avoidance and other active safety or autonomous driving in cars characteristic. Unfortunately, due to their increased complexity, MIMO radar systems are typically larger in size and cost. [0002] A cascaded radar system is a form of MIMO radar system that minimizes complexity (and thus size and cost) by operating all transceivers from a master local oscillator (LO) signal. The main LO signal is used for frequency upconversion and downconversion in the transceiver. If the main LO signal is ...

Claims

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Application Information

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IPC IPC(8): G01S13/931G01S13/58G01S13/06G01S7/41G01S7/02
CPCG01S13/931G01S13/58G01S13/06G01S7/02G01S7/41G01S2013/93273G01S7/0232G01S7/028G01S7/003G01S13/003G01S13/343G01S7/4008G01S7/4017G01S13/87G01S7/032G01S7/282H04B7/0413
Inventor 李正征
Owner APTIV TECH LTD
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