Frequency diversity MIMO radar parameter estimation method based on matrix pencil principle

A technology of frequency diversity and parameter estimation, applied in radio wave measurement systems, instruments, etc., can solve problems such as limitations and failures, and achieve the effects of low signal-to-noise ratio, expanded number of snapshots, high complexity and high precision

Pending Publication Date: 2022-04-29
XIDIAN UNIV +1
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Problems solved by technology

[0005] However, since the algorithm is also decomposed based on the covariance matrix of the received data, and the algorithm is prone to failure in the case of low snapshot and low signal-to-noise ratio
Therefore, the above method will be greatly limited in practical application

Method used

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  • Frequency diversity MIMO radar parameter estimation method based on matrix pencil principle
  • Frequency diversity MIMO radar parameter estimation method based on matrix pencil principle
  • Frequency diversity MIMO radar parameter estimation method based on matrix pencil principle

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Embodiment 1

[0062] See figure 1 , figure 1 It is a schematic flowchart of a frequency diversity MIMO radar parameter estimation method based on the matrix beam principle provided by an embodiment of the present invention. An embodiment of the present invention provides a method for estimating parameters of a frequency diversity MIMO radar based on the principle of matrix beams. The method for estimating parameters of a frequency diversity MIMO radar includes steps 1 to 8, wherein:

[0063] Step 1. M transmitting array elements transmit orthogonal signals.

[0064] In the embodiment of the present invention, the monostatic signal model of the frequency diversity MIMO radar is considered, such as figure 2 As shown, the transmitting end adopts M transmitting array elements, and the arrangement of the array elements adopts a uniform linear array structure, and the distance between the array elements is d t . The receiving end adopts N receiving array elements, and the arrangement of the ...

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Abstract

The invention discloses a frequency diversity MIMO radar parameter estimation method based on a matrix pencil principle. The method comprises the following steps: firstly, deducing a receiving signal model of a frequency diversity MIMO radar, and analyzing a coupling relationship between an angle and a distance in a transmitting-receiving steering vector; secondly, an echo signal obtained after matched filtering of a receiving end is used for constructing an augmented matrix beam of the echo signal; then, matrix decomposition and transformation are carried out on the augmented matrix bundle, and diagonal phase matrixes containing angle and distance information are obtained respectively; and finally, in consideration of the coupling and matching problems of the angle and distance parameters of the target, the matching is realized by adopting the same characteristic vector, and the accurate positioning of the target is realized. A simulation result shows that compared with the prior art, the method has excellent estimation performance under the conditions of low snapshot number and low signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a frequency diversity MIMO radar parameter estimation method based on a matrix beam principle. Background technique [0002] Frequency diversity array is a new system array radar technology developed in the field of radar signal processing in recent years. The frequency diversity array adopts a small frequency offset in different transmitting elements to obtain beams with distance dependence. Because its beam pattern is related to time, angle, distance and frequency offset, it has become the focus of many researchers. The combination of frequency diversity radar and MIMO (Multiple Input Multiple Output) radar, that is, frequency diversity MIMO (FDA-MIMO) radar shows significant advantages in parameter estimation and beamforming. Since the single-base frequency diversity MIMO radar has the advantages of flexibility, joint control of transceivers and o...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/418
Inventor 朱圣棋刘飞龙刘兴江李西敏许京伟闫礼倪旺
Owner XIDIAN UNIV
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