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Distributed information source airspace parameter estimation method based on finite innovation rate

A technology of distributed information sources and airspace parameters, which is applied in the field of distributed information source airspace parameter estimation, can solve the problems of reducing the sampling rate, etc., and achieve the effects of reducing complexity, wide application range, and strong practicability

Active Publication Date: 2021-08-13
HARBIN INST OF TECH
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Problems solved by technology

The innovation rate of a parameterized signal is defined as the number of degrees of freedom of the signal per unit time, usually much lower than its Nyquist frequency, thus minimizing the sampling rate

Method used

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  • Distributed information source airspace parameter estimation method based on finite innovation rate
  • Distributed information source airspace parameter estimation method based on finite innovation rate
  • Distributed information source airspace parameter estimation method based on finite innovation rate

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specific Embodiment 1

[0077] according to Figure 1 to Figure 7 As shown, the present invention provides a method for estimating spatial parameters of distributed information sources based on a finite rate of innovation, comprising the following steps:

[0078] A method for estimating airspace parameters of distributed information sources based on finite information rate, comprising the following steps:

[0079] like figure 1 , there are Q antennas on the antenna array located at The celestial body emits k monochromatic and uncorrelated distributed signals. Each propagates p in the direction of the unit vector k =[cosθ k , sinθ k ] T , where θ k is the azimuth angle of the kth electromagnetic wave.

[0080] The baseband representation of a signal from direction p ∈ S within a narrow band centered at frequency w in is the signal generated by the radio interference received by the antenna at p and frequency w. From the perspective of energy, it can be described as:

[0081]

[0082]...

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Abstract

The invention relates to a distributed information source airspace parameter estimation method based on a finite innovation rate. The invention relates to the technical field of signal processing, and the method comprises the steps: carrying out the integration of a receiving signal of an antenna along all plane waves of a unit circle, and determining an expansion coefficient of a sub-band with a frequency omega as a center in a measurement antenna array; establishing linear mapping from a VPW-FRI model Fourier coefficient to a given measurement value Vq,q', and determining a conversion matrix; constructing a zero filter, and reconstructing a source azimuth angle; and carrying out constraint optimization, constructing a linear equation set, and determining a central angle and a divergence angle. Compared with traditional distributed information source airspace parameter estimation methods such as a DSPE algorithm and a robust Capon beam forming method, the method has the advantages that the number of array elements and the number of snapshots required by experiments can be reduced, and the method is not affected by array shapes under the condition of low signal-to-noise ratio, so that the complexity of sampling and processing processes is reduced, and the method is simpler and more convenient.

Description

technical field [0001] The invention relates to the technical field of signal processing, and relates to a method for estimating spatial parameters of distributed information sources based on a limited innovation rate. Background technique [0002] As an important branch of signal processing, array signal processing has important applications in many national economic and military fields such as communication, radar, sonar, navigation, geological exploration, oceanography, biomedicine, and radio astronomy. Direction of Arrival (DOA) estimation is one of the main research directions in the field of array signal processing. [0003] In order to simplify the processing, the traditional DOA estimation method usually assumes the target signal as a point signal source, but the actual signal will always have a certain angle expansion in space due to factors such as multipath scattering. We collectively refer to this kind of angle expansion signal as It is a distributed signal sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/14G06F17/11
CPCG06F30/20G06F17/11G06F17/14Y02D30/70
Inventor 付宁乔立岩冯庆泉云双星彭喜元
Owner HARBIN INST OF TECH
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