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No-fuzzy-parameter estimation method of frequency diversity MIMO radar

A technology of frequency diversity and parameter estimation, applied to radio wave measurement systems, instruments, etc., can solve problems such as distance ambiguity, unambiguous target distance information, and limited target precise positioning

Active Publication Date: 2018-06-22
XIDIAN UNIV
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Problems solved by technology

Although the transmitting beam of the frequency diversity array can provide target range information, the problem of range ambiguity still needs to be solved due to its coupling characteristics of distance and angle
Traditional parameter estimation methods cannot directly obtain unambiguous target distance information, which limits the precise positioning of the target

Method used

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] Based on the frequency diversity MIMO geometric model, the factors that affect the coupling of the transmit pattern are analyzed as follows: frequency increment and array element spacing.

[0023] In the embodiment of the present invention, figure 1 Shown is a geometric model of a frequency diversity MIMO radar system consisting of M transmit antennas and N receive antennas. The spacing between each antenna array element is the same, both are d. Takin...

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Abstract

The invention belongs to the field of radar signal processing, and discloses a no-fuzzy-parameter estimation method of a frequency diversity MIMO radar. The method comprises the steps of analyzing a relationship between a frequency increment and an element spacing which influence the traditional frequency diversity MIMO radar to form a distance-angle tight-coupling directional diagram, and designing a reasonable nonlinearly-increasing frequency increment; obtaining angle information of a target by transmitting a pulse of which the frequency increment is 0 and conducting Capon spectrum estimation; then transmitting a pulse of which the frequency increment increases nonlinearly, substituting the estimated angle information into a whole processing process, and combining the Capon spectrum estimation to obtain distance information of the target. According to the no-fuzzy-parameter estimation method of the frequency diversity MIMO radar, not only is the problem of distance-angle tight coupling of a frequency diversity MIMO radar transmitting directional diagram solved, but also the angle and no-fuzzy distance estimation of the target are achieved, and precise locating of the target is further achieved.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a method for estimating an unambiguous parameter of a frequency diversity MIMO radar, which can be used for decoupling and decoupling distance and angle of a pattern of a frequency diversity MIMO radar to obtain unambiguous target parameter estimation. Background technique [0002] Frequency diversity array is a more flexible new system array radar technology proposed in the past ten years. Existing literatures on adaptive radar and cognitive radar often use single antenna or phased array as receiver. [0003] However, the receiving beamforming method based on phased array can only provide the azimuth information of the target, and cannot estimate the distance information of the target. The frequency diversity array radar introduces a frequency increment between each antenna element, obtains the range-angle dependent waveform, and introduces an additi...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 朱圣棋陈娟娟许京伟廖桂生王宇卓
Owner XIDIAN UNIV
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