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Multi-moving-object signal processing method based on stepped frequency radar

A multi-moving target and stepped frequency radar technology, which is applied in the field of multi-moving target signal processing based on stepped frequency radar, can solve problems such as moving target detection and achieve high application value

Active Publication Date: 2016-04-13
WUHU SENSOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-moving target signal processing method based on stepped frequency radar. It is difficult to apply to multi-target occasions for conventional FMCW radars, and the classic SFCW radar cannot detect moving targets. The present invention is based on The traditional SFCW waveform adopts a unique signal processing scheme: first, the receiver intermediate frequency signal is oversampled

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  • Multi-moving-object signal processing method based on stepped frequency radar
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  • Multi-moving-object signal processing method based on stepped frequency radar

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Experimental program
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Embodiment

[0030] (1) Transmitter

[0031] Step 1. Radar launch figure 2 SFCW signal shown. in, is the initial frequency of transmission, represents the step frequency interval, represents the time width of each frequency, is the number of frequency points of the step frequency, and the total frequency bandwidth of the transmitted signal , the coherent processing time . And for conventional radar, it generally satisfies .

[0032] (2) Receiver

[0033] Step 1. The signal emitted by the radar is reflected by the target to form an echo, assuming that there are target, and down-convert the received echo to obtain an intermediate frequency signal (the block diagram of the radar system model is shown in figure 1 ).

[0034] Step 2: Sampling the intermediate frequency signal, sampling within the time width of each frequency points, the sampling frequency ( ), is the sampling time; then the total number of sampling points of the intermediate frequency signal is . ...

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Abstract

The invention provides a multi-moving-object signal processing method based on a stepped frequency radar, and aims at solving the problems that a routine FMCW radar is hard to apply to the multi-object occasion, and a classic SFCW radar cannot detect moving objects. According to the invention, a unique signal processing scheme is used on the basis of the traditional SFCW waveform. The method comprises that oversampling is carried out on intermediate-frequency signals of a receiver; sampled data is extracted at equivalent interval, and the unique calculation method is used to obtain distance and speed information of the objects at the same time and overcome the difficulty in pairing the upper sweep frequency with the lower sweep frequency of the multiple objects in the routine FMCW. The method is further applied to the multi-object occasion, and is especially suitable for the fields related to intelligent traffics, safety protection and aided safe driving of automobile.

Description

technical field [0001] The invention relates to the field of moving target signal detection, in particular to a multi-moving target signal processing method based on stepping frequency radar. Background technique [0002] In recent years, radar technology represented by short-range target detection has been widely used in the civilian field. For example, in a car safety assisted driving system, a millimeter-wave anti-collision radar is required to detect the front and rear of the vehicle, as well as blind spots and side vehicle targets. In the field of intelligent transportation, microwave speed radar can be used not only to measure the speed of vehicles, but also to obtain information such as traffic flow, occupancy rate, and even vehicle size and dimensions of the lane. In the intelligent security system, short-range radar can be used in key places such as prisons and banks to foresee and prevent illegal activities. [0003] Traditional short-range radars usually use fre...

Claims

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Application Information

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IPC IPC(8): G01S13/72
CPCG01S13/726
Inventor 秦屹郑远
Owner WUHU SENSOR TECH CO LTD