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MIMO (Multiple Input Multiple Output) radar wave shape online designing method

A design method and technology of radar waveforms, applied in the field of radar, can solve problems such as not considering the correlation characteristics of spatially synthesized signals or echo signals, failing to meet the engineering requirements of online design waveforms, etc., and achieve good autocorrelation characteristics and cross-correlation characteristics Effect

Active Publication Date: 2011-01-19
XIDIAN UNIV
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Problems solved by technology

At present, for these two problems, the existing methods do not consider the relevant characteristics of the spatially synthesized signal or the echo signal, and cannot meet the engineering requirements of online waveform design

Method used

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  • MIMO (Multiple Input Multiple Output) radar wave shape online designing method
  • MIMO (Multiple Input Multiple Output) radar wave shape online designing method
  • MIMO (Multiple Input Multiple Output) radar wave shape online designing method

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Embodiment Construction

[0054] Step 1, construct the base beam library offline

[0055] In order to obtain the emission pattern with low spatial sidelobes and low spatial cross-correlation coefficients, the base beams to be constructed must also have low spatial domain sidelobes, and the base beams must have smaller spatial cross-correlation coefficients between each other. Using Chebyshev weighting for phased array to have low sidelobe characteristics, carry out Chebyshev amplitude weighting on MIMO radar linear array, and construct a set of base signal vectors

[0056] x l =w(⊙a(θ l ), l=1, 2, ..., L

[0057] Where w is the M×1 dimensional Chebyshev weighted vector, M is the number of array elements, ⊙ means point multiplication, θ l Indicates the direction of the l-th base signal vector, a(θ l ) represents pointing angle θ l The steering vector of , L represents the total number of base signal vectors.

[0058] Construct the base beam library based on these base signal vectors

[0059] ...

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Abstract

The invention discloses a centralized MIMO radar wave shape online designing method mainly aiming to solve the problems that a transmitting direction diagram can not be designed on line and the wave shape of a transmitted signal can not be synthesized on line by utilizing the traditional methods. The method comprises the following steps of: (1) carrying out amplitude weighting on an MIMO radar array, and constructing a fundamental wave beam bank with lower airspace sidelobe off line; (2) based on sequence quadratic programming, constructing various proportions of orthotropic fundamental wave shape banks which have low autocorrelation peak sidelobe level and low peak cross-correlation level off line; (3) solving the transmitting proportion of fundamental wave beams synthetizing the given transmitting direction diagram on line by utilizing linear programming; (4) selecting the fundamental wave shapes meeting the demand from the orthotropic fundamental wave shape banks according to the transmitting proportion of the fundamental wave beams; and (5) respectively synthetizing the transmitting direction diagram and a transmitting signal wave shape by the selected fundamental wave beams and the fundamental wave shapes. Compared with the traditional wave shape designing method, the invention can realize the online wave shape design and can be used for the self-adaption tracking of an MIMO radar on a moving target.

Description

technical field [0001] The invention belongs to the technical field of radar, relates to the design of radar waveforms, can be used for the online design of MIMO radar waveforms, and meets engineering requirements. Background technique [0002] Multiple-input multiple-output MIMO radar is a new active detection technology, and has become a research hotspot in the field of radar technology. [0003] According to the distance between the transmitting antenna and the receiving antenna, MIMO radar can be divided into two types: distributed MIMO radar and centralized MIMO radar. For distributed MIMO radar, since each antenna has different observation angles of view on the target and the independence of the target echo, in a statistical sense, this type of MIMO radar can overcome the scintillation effect of the target and improve the detection performance of the radar to the target. Such as [Fishler E., Haimovich A., Blum R., et al..Spatial diversity in radars---models and detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28G01S7/32H04B7/06
Inventor 刘宏伟胡亮兵纠博王旭叶超
Owner XIDIAN UNIV
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