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A realization method of frequency control array mimo radar system based on matrix filling

A radar system and matrix filling technology, applied in the radar field, can solve the problems of CS-MIMO radar performance degradation and other issues

Active Publication Date: 2017-11-10
HUBEI UNIV OF TECH
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Problems solved by technology

However, CS-MIMO radar performance degrades when the target deviates from the grid points

Method used

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  • A realization method of frequency control array mimo radar system based on matrix filling
  • A realization method of frequency control array mimo radar system based on matrix filling
  • A realization method of frequency control array mimo radar system based on matrix filling

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Embodiment Construction

[0077] refer to figure 1 with figure 2 , illustrating that the specific implementation steps of the frequency-steered array MIMO radar based on matrix filling of the present invention include:

[0078] Step 1, establish the transmit signal model of the frequency control array MIMO radar, obtain the transmit carrier, frequency array, number of transmit antennas and transmit waveform symbol length:

[0079] Such as figure 1 As shown, consider the narrowband frequency-steered-array MIMO radar system model, the array is composed of N transmitting antennas and M receiving antennas. The frequency control array MIMO radar system transmits N different transmission signals x(t), which are expressed as follows:

[0080]

[0081] where E is the transmitted energy, T is the radar pulse duration, f n is the carrier frequency on the nth antenna, is a single-mode transmit waveform. f n with Written in vector form, they are:

[0082]

[0083]

[0084] in,

[0085] s(t)=[...

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Abstract

The invention discloses a realization method of an FDA MIMO radar system based on matrix completion, belongs to the field of radar technology, and aims at reducing measuring data which needs processing and obtaining higher distance, angle and Doppler-dimension resolutions. The method comprises the following steps that 1) according to practical requirements and characteristics of the FDA MIMO radar system, an emission carrier wave, an frequency array, the amount of emission antennas and the code-element length of the emission carrier wave are determined, and an emission model of a FDA MIMO radar is established; 2) according to a target space environment, the type of reception antennas and the amount of antennas of the FDA MIMO radar are determined, and a reception signal model is constructed; 3) based on obtained partial reception data, a Lq norm space processing technology to obtain recovery of a data matrix; and 4) the data matrix is combined with a parameter estimation method to obtain combined estimation of a target distance, an orientation 2D space and Doppler.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to a method for realizing a new system MIMO radar system. Background technique [0002] The concept of Frequency diverse array (FDA) was first proposed by P.Antonik et al. at the 2006 IEEE Radar Annual Meeting. P.Antonik pointed out that the beam scanning angle of the frequency-controlled array beamformer changes with the distance, which provides more flexible beam scanning and also provides a way to resist multipath interference. In FDA, there is a small frequency increment in adjacent array elements, which is constant relative to time and far smaller than the carrier frequency, so the transmitted signals partially overlap in the frequency domain. [0003] MIMO (multiple-input multiple-output) radar can greatly improve the angular resolution, improve the recognition ability of target parameters, improve the detection of low-speed targets and weak targets, and improve the estimation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/42
CPCG01S7/42
Inventor 巩朋成李婕张正文丰励李仄立
Owner HUBEI UNIV OF TECH
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