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chirp signal generator

A chirp signal, chirp technology, applied in the field of radar

Active Publication Date: 2020-08-18
斯凯瑞利(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the popularization and expansion of the application of the FMCW radar system, the demand for its chirp mode is also increasingly diversified, and the chirp signal generator that can only emit a single triangle wave and sawtooth wave cannot meet the demand

Method used

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0017] The frequency modulation continuous wave FMCW radar system generally uses the chirp frequency modulation signal as the emission detection signal. Among them, triangle wave and sawtooth wave are the two most commonly used chirp signals. Its FM scanning bandwidth and FM slope are used as chirp parameters, which can be programmed and stored in the chirp parameter c...

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Abstract

The embodiment of the invention provides a linear frequency-modulated signal generator which comprises a configuration area and an accumulator. The configuration area and the accumulator are connected. The configuration area comprises a plurality of configuration units, and each configuration unit stores a characteristic parameter set used for defining one frequency-modulated unit in a frequency-modulated signal. The accumulator is used for generating linear frequency-modulated control signals corresponding to all configuration units according to the execution sequence of the multiple configuration units and according to the characteristic parameter sets of all the configuration units in sequence. In the linear frequency-modulated signal generator, due to the fact that all the frequency-modulated units have different waveforms, and the linear frequency-modulated signals of the multiple frequency-modulated units can be combined to form complete linear frequency-modulated signals, the linear frequency-modulated signals of any waveforms can be obtained by combining the frequency-modulated units of different waveforms according to different sequences, and the use demand of a radar is met.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of radar, and more specifically, relate to a chirp signal generator. Background technique [0002] In a frequency modulated continuous wave (FMCW) radar system, the transmitter generally uses linear frequency modulation to transmit scanning frequency signals. The signal propagates at the speed of light, and is received and demodulated by the receiver after being reflected by obstacles encountered during the propagation process. see Figure 5 , there is an electromagnetic wave propagation delay between the transmitted signal and the received signal reflected by the target object, and the propagation delay corresponds to the frequency offset of the chirp system. By detecting the offset frequency, the demodulator can obtain information such as the distance and relative speed of the target obstacle. [0003] In the prior art, a chirp waveform generator is used in an FMCW radar system to ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/282
CPCG01S7/282
Inventor 郑巍王树甫
Owner 斯凯瑞利(北京)科技有限公司