A radar working method and system based on Fourier transform

A technology of Fourier transform and radar, which is applied in the field of target detection and can solve the problems of high transmission power and low power of radar

Active Publication Date: 2021-09-10
BEIJING INST OF ELECTRONICS SYST ENG
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Problems solved by technology

The measurement accuracy of pulse Doppler radar depends on the pulse width, the narrower the pulse is, the higher the accuracy is, but under the condition of narrow pulse, the transmission power of the radar is required to be high; the frequency modulation continuous wave radar has the characteristics of low power, but it is difficult to detect multiple targets detection

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  • A radar working method and system based on Fourier transform
  • A radar working method and system based on Fourier transform

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Embodiment Construction

[0022] In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present application, and Not an exhaustive list of all embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0023] The core idea of ​​this scheme is to make the duty cycle of both signal transmission and reception 50%, so that the total duty cycle is 25%, and then analyze and calculate the target based on Fourier transform, thereby optimizing the performance of the radar.

[0024] Such as figure 1 As shown, this scheme discloses a radar working system based on Fourier transform, the system includes: a transmitting unit,...

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Abstract

The present application provides a radar working method and system based on Fourier transform, wherein the steps of the method include: transmitting electromagnetic waves to the target in a square wave mode with a 50% duty cycle, and using the same frequency and phase as the transmitting unit The square wave mode receives the electromagnetic wave reflected by the target; sweeps the frequency from low to high in the square wave sweep frequency range to obtain the average value of the radar detection signal at different square wave frequencies; performs Fu Liye transform to obtain time domain information. The technical solution described in this application has strong detection ability, low transmission power, low signal-to-noise ratio, and can detect multiple.

Description

technical field [0001] The present application relates to the field of target detection, in particular to a radar working method and system based on Fourier transform. Background technique [0002] Radar is a technology that emits electromagnetic waves to irradiate a target and receives its echo to obtain target information. The target's distance, speed, and reflection area can be calculated through information such as the time difference between the launch and reception of electromagnetic waves, the frequency difference, and the strength of the echo signal. Radar has been widely used in military, national defense, transportation, meteorology and many other fields. [0003] There are many types of radar, such as pulse radar, pulse Doppler radar, continuous wave radar, frequency modulation continuous wave radar, pulse compression radar and so on. Among them, pulse Doppler radar and frequency modulated continuous wave radar are widely used and can measure target distance and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02
Inventor 宋祥祥房霄孙芬张斌李志远李璀
Owner BEIJING INST OF ELECTRONICS SYST ENG
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