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A method of distinguishing radar detection targets based on information theory

An information theory and target technology, applied in the field of information transmission and processing, can solve problems such as poor resolution of radar systems, and achieve the effect of solving complex integrals, reducing the amount of calculation, and improving the theoretical guiding significance.

Active Publication Date: 2020-12-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a method for distinguishing radar detection targets, which can break through the limitation of signal bandwidth and solve the problem of poor resolution of existing radar systems

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  • A method of distinguishing radar detection targets based on information theory
  • A method of distinguishing radar detection targets based on information theory
  • A method of distinguishing radar detection targets based on information theory

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Embodiment Construction

[0028] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, a method for distinguishing radar detection targets based on information theory includes the following steps:

[0030] Step 1. The receiving end of the radar system receives the signal. Let the single-carrier signal received by a receiving antenna in the MIMO radar system be:

[0031]

[0032] Among them, s(t) represents the actual baseband signal, f c and denote the carrier frequency and initial phase, respectively, α l and τ l respectively represent the scattering coefficient and time delay of the l-th target, w(t) represents the mean value of the real part and imaginary part is 0, and the variance is N 0 The complex white Gaussian noise of / 2, L is the total number of targets; s (t) selects ideal low-pass signal among the present embodiment, s (t)=sinc (Bt), also can adopt chirp signal, multi-carrie...

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Abstract

The invention discloses a method for distinguishing a radar detection target based on the information theory. The method comprises steps that S1, signals are received by a radar system receiving end;S2, the received signals are down-converted to a base band, and discretization is performed through sampling at a sampling rate B to obtain a discrete sequence; S3, the received signals of N receivingantennas in a radar system are processed in the S2 to form a sampling signal matrix Z, and the multidimensional probability density function p (Z|X, Y) of Z is calculated under the condition of the given target position X and the target amplitude Y; and S4, the number of p(Z|X, Y) peaks is calculated, namely, the number of distinguished radar detection targets. The method is advantaged in that signal bandwidth restriction can be broken through, and a problem of relatively poor resolution of a radar system in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of information transmission and processing, and in particular relates to a method for distinguishing radar detection targets. Background technique [0002] The ultimate goal of studying the high-resolution processing algorithm of radar targets is to improve the radar resolution performance. The so-called radar resolution refers to the ability to distinguish the signals of two or more targets in a multi-target environment. It is generally considered from two aspects, namely distance resolution and azimuth resolution. The distance resolution refers to the minimum distance interval that can distinguish two targets with different distances in the same direction. The higher the distance resolution, the stronger the ability of the radar to distinguish two targets with closer distances, and the clearer the radar target after processing considerable. The azimuth resolution refers to the minimum azimuth difference ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/06
CPCG01S13/06
Inventor 陈越帅徐大专
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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