Method for designing diversity phased array based on millimeter-wave collision-avoidance radar

A design method and phased array technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of collision avoidance radar design system, lack of engineering implementation methods, etc.

A design method and phased array technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of collision avoidance radar design system, lack of engineering implementation methods, etc.

CN108226871AActive Publication Date: 2018-06-29CNGC INST NO 206 OF CHINA ARMS IND GRP
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  • Method for designing diversity phased array based on millimeter-wave collision-avoidance radar
  • Method for designing diversity phased array based on millimeter-wave collision-avoidance radar
  • Method for designing diversity phased array based on millimeter-wave collision-avoidance radar

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Embodiment Construction

[0021] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0022] The present invention includes two aspects of a diversity phased array antenna array design and a signal processing method of a millimeter-wave collision avoidance radar, and mainly includes the following steps:

[0023] (1) Mathematical derivation and proof of the performance equivalence relationship between diversity phased array radar and MIMO radar;

[0024] (2) Synthesis method of diversity phased array radar antenna pattern;

[0025] (3) A signal processing method for single-shot data;

[0026] (4) A signal synthesis method for multi-shot data.

[0027] Each step is described in detail below:

[0028] step 1)

[0029] The centralized MIMO radar forms a virtual aperture by transmitting orthogonal waveforms, and its signal processing flow is as follows: figure 1 shown. Let the target be a single target, the radiation intensity of each transceiver...

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Abstract

The invention relates to a method for designing a diversity phased array based on a millimeter-wave collision-avoidance radar. The method is characterized in that the distance between radar transmission array elements is equal to the length of a receiving array; a transmission wave beam can realize the whole-airspace coverage through multiple beats of scanning, and transmission grating lobes are formed in multiple directions during each beat; a receiving wave beam simultaneously points the transmission grating lobes through DBF (digital beam formation) during each beat; the whole-airspace coverage type scanning can be formed by multiple beats of synthesis. The method has the advantage that an orthogonal signal does not need to be generated, but the property of MIMO (multiple input multipleoutput) radar virtual aperture can be formed, so that the complexity of the system is effectively controlled, and the radar cost is reduced.

Description

technical field [0001] The invention belongs to the field of overall radar design, and specifically relates to the design of a diversity phased array antenna array and a signal processing method of a millimeter-wave collision avoidance radar. Background technique [0002] Millimeter-wave anti-collision radars often use frequency-modulated continuous-wave (LFMCW) systems. In order to expand the antenna receiving aperture and improve the radar azimuth resolution, a multiple-input multiple-receiver (MIMO) system can be used. [0003] Traditional MIMO systems need to send orthogonal signals, and the orthogonal methods can be divided into time division, frequency division and code division. Among them, in the time-division method, due to the time-division transmission of the transmitting antenna, it is necessary to compensate the phase difference at the receiving end caused by the target motion, and an additional phase compensation algorithm needs to be introduced; in addition, a...

Claims

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Application Information

Patent Timeline
29 Jun 2018
Publication
CN108226871A
IPC
G01S7/02
CPC
G01S7/02
Inventors
唐尧; 杜自成