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Coding frequency-hopping high-resolution ratio range finding and velocity measuring method and radar

A high-resolution range and high-resolution technology, applied in the radar field, can solve problems such as low false alarm rate and measurement accuracy, and achieve the effects of suppressing interference, low system bandwidth, and reducing manufacturing and maintenance costs.

Inactive Publication Date: 2006-03-01
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the existing high-resolution ranging and speed-measuring radar, and propose a coded frequency-hopping high-resolution ranging and speed-measuring method and radar, which have strong anti-interference ability in the simultaneous working environment of multiple radars , low false alarm rate and high measurement accuracy

Method used

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  • Coding frequency-hopping high-resolution ratio range finding and velocity measuring method and radar
  • Coding frequency-hopping high-resolution ratio range finding and velocity measuring method and radar
  • Coding frequency-hopping high-resolution ratio range finding and velocity measuring method and radar

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Embodiment one, implement the automobile anti-collision radar of the inventive method

[0078] 1. Waveform design:

[0079] As a car anti-collision radar, it is necessary to accurately measure the distance and speed of multiple surrounding targets (including cars and obstacles in front) at the same time when working, and to eliminate the interference of other car radars to maintain a very low false alarm rate, so Automotive anti-collision radars generally work in an environment where there are multiple targets ahead and multiple radars operate. In order to explain the problem concisely, a period of radar transmission waves is designed as two frequency hopping pairs (the method of multiple frequency hopping pairs is the same), which are composed of four frequency hopping segments A, B, C, and D, and each frequency hopping segment transmits The signal corresponds to the frequency hopping pair mathematical expression (I), specifically:

[0080] x A (i)=A i cos(2π(f c ...

Embodiment 2

[0132] Embodiment 2. A single radar workplace implementing the method of the present invention

[0133] When a single radar is working, its transmission waveform can use frequency hopping waves, or a combination of frequency hopping waves and single-frequency continuous waves. Since other radar interference is not a concern, one or more frequency hopping pairs can also be used in combination with a single frequency continuous wave waveform. The expression of its frequency hopping pair can adopt expression (I) or (II). In order to explain the problem briefly, only one frequency-hopping pair and two frequency-hopping pairs are combined with single-frequency continuous wave as an example to illustrate the method of speed measurement and distance measurement in a single radar workplace (multiple frequency-hopping pairs and single-frequency continuous wave combined in the same way). Its waveform diagrams are as follows Figure 9 , Figure 10 shown. The echo signal processing b...

Embodiment 3

[0139] Embodiment three. Implement the security monitoring radar of the inventive method

[0140] 1. Launch waveform design

[0141] The present embodiment uses the frequency hopping pair expression form (II)

[0142] The mathematical expression of the transmitted signal in each frequency hopping band is:

[0143] x A (i)=A i cos(2π(f c +b(n,i)Δf 1 )t+θ i ), i=0, 1, 2...1022 (24)

[0144] x B (i)=B i cos(2π(f c -b(n,i)Δf 1 )t+θ i '), i=0, 1, 2...1022 (25)

[0145] u C (i)=C i cos(2π(f c +b(n,i)Δf 2 )t+θ i "), i=0, 1, 2...1022 (26)

[0146] u D (i)=D i cos(2π(f c -b(n,i)Δf 2 )t+θ i ), i=0, 1, 2...1022 (27)

[0147] Among them: i·T p ≤t≤(i+1) T p ,T p is the sub-pulse width, A i , B i , C i ,D i are the amplitudes of the ith sub-pulse in sections A, B, C, and D respectively, θ i , θ i ', θ i ", θ i  are the relative phases of the ith sub-pulse in sections A, B, C, and D respectively, f c is the starting frequency of the carrier frequency, an...

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Abstract

The present invention relates to an encoding frequency-hopping high-resolution distance-measuring speed-measuring method and radar. In particular, it is applicable to automobile anti-collision radar and police speed-measuring radar, and can be substituted for infrared alarm to make all-weather real-time safety supervisory control for large-range sensitive area. Said invention also provides the concrete steps of said distance-measuring and speed-measuring method, and can make several radars have strong anti-interference power when they are simultaneously worked.

Description

technical field [0001] The invention belongs to the field of radar technology, and relates to a radar and its distance measurement and speed measurement method, in particular to a coded frequency hopping high-resolution distance measurement and speed measurement method and a radar, which can be used for high-resolution and real-time detection of single or multiple radars at the same time. Measure the distance and speed of multiple targets within the observation area. Background technique [0002] In order to use radar to measure the distance and speed of multiple objects at the same time with high resolution, the following methods are commonly used at present [0003] (1) Use the triangular linear frequency-modulated continuous wave (FMCW) method [the principle of radar, edited by Ding Lufei and Geng Fulu in the third edition of Xidian University Press]. This approach requires the use of a broadband voltage-controlled oscillator (VCO) and a high sampling rate analog-to-digi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/79G01S13/91G01S13/93G01S7/36G01S7/41
Inventor 陈伯孝李牧
Owner XIDIAN UNIV
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