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Novel target parameter estimation based on wideband ambiguity function

A technology of fuzzy functions and target parameters, applied in radio wave measurement systems, instruments, etc., can solve the problems of less research on MIMO radar joint estimation, and achieve the effect of low intercept probability characteristics

Inactive Publication Date: 2017-05-17
DALIAN UNIVERSITY
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Problems solved by technology

Although these methods have good performance, there are few studies on the joint estimation of receiving and receiving angles and Doppler frequency of wideband bistatic MIMO radar[11]

Method used

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  • Novel target parameter estimation based on wideband ambiguity function
  • Novel target parameter estimation based on wideband ambiguity function
  • Novel target parameter estimation based on wideband ambiguity function

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Embodiment Construction

[0048] The present invention will be further described below in combination with the accompanying drawings and the implementation background technology.

[0049] signal model

[0050] The structure of the bistatic MIMO radar system used in the present invention is as follows figure 1 shown. The numbers of transmitting and receiving array elements are Q and N respectively, and the spacing between array elements is d t and d r , assuming that the radar works in the broadband far-field condition, the transmitting array and the receiving array are in the same phase center. Suppose there are L targets on the same range resolution unit, Indicates the radar emission angle and reception angle corresponding to the lth target. In order to improve the anti-jamming performance, consider that the transmitted signal of the transmitting array element is a linear frequency modulation signal. Under broadband conditions, the echo signal received by the radar will not only produce a Dopple...

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Abstract

The invention discloses a novel target parameter estimation based on a wideband ambiguity function, which belongs to the technical field of electronic communication. A WBAF-MUSIC algorithm and a WBAF-ESPRIT algorithm are provided, the WBAF-MUSIC algorithm realizes estimation of an acceptance angle, and the WBAF-ESPRIT algorithm realizes estimation of a phase angle. According to the novel target parameter estimation based on the wideband ambiguity function provided by the invention, in a dual-base station MIMO (multiple input multiple output) radar, linear frequency modulation signals are selected as transmission signals, the characteristic of a large time-bandwidth product is used, and a better low-interception probability characteristic is thus acquired. Joint estimation of a Doppler frequency shift factor and time delay is realized through searching a wideband ambiguity function peak point firstly.

Description

technical field [0001] The invention relates to a new method for estimating target parameters based on broadband fuzzy functions, and belongs to the technical field of electronic communication. Background technique [0002] Bistatic radar has potential advantages in anti-stealth, anti-jamming, and anti-radiation missiles, but there are three technical problems in the realization of time, angle, and frequency synchronization. Multiple input multiple output (MIMO) radar is a new radar system with many advantages, so it has become a research hotspot in the academic circle. Bistatic MIMO radar can realize the simultaneous measurement of the target angle of the receiving station and the target angle of the transmitting station without angle synchronization, which provides a new way for bistatic radar target positioning [1-3]. [0003] Estimation and localization of target parameters is an important content of radar signal processing. Most of the existing bistatic MIMO radar par...

Claims

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Application Information

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IPC IPC(8): G01S7/42
CPCG01S7/42
Inventor 李丽
Owner DALIAN UNIVERSITY
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