Conical surface conformal array blind polarization direction of arrival estimation method

A technology of direction of arrival estimation and conformal array, which is applied in radio wave direction/bias determination systems, directional devices for determining directions, and direction finders using radio waves. The effect of complexity

Pending Publication Date: 2021-09-21
AIR FORCE UNIV PLA
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Problems solved by technology

In addition, the covariance matrix splitting estimation compromises the arbitrariness of the real-valued operation and the array structure, and then develops two new super-resolution algorithms based on half-real-valued operations, which get rid of the algorithm's dependence on the array structure, but there are still The ambiguity of the mirror orientation needs to be further dealt with in the algorithm application process

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  • Conical surface conformal array blind polarization direction of arrival estimation method
  • Conical surface conformal array blind polarization direction of arrival estimation method
  • Conical surface conformal array blind polarization direction of arrival estimation method

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[0134] Example: Simulation experiment of human target gait fine recognition

[0135] Experiment 1: Analysis of estimated parameter error and signal-to-noise ratio

[0136] Experimental conditions: array structure such as Figure 5 a- Figure 5 As shown in f, the polarization amplitude ratio is 5, the phase difference is 30°, and the number of experiments is 5000 times; the signal-to-noise ratio is -5dB to 15dB, with a step of 1dB; the number of array elements is 30, and the number of snapshots is 100 times; the direction of arrival: Wave up to 1, pitch angle: 65 degrees, azimuth: 80 degrees; wave up to 2, pitch angle: 80 degrees, azimuth: 95 degrees.

[0137] It can be seen from the simulation experiment that the proposed algorithm can solve the problem of multi-radiation source orientation estimation. With the increase of the signal-to-noise ratio, the DOA estimation success probability, estimation variance and estimation deviation of the real-valued efficient algorithm of ...

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Abstract

The invention provides a conical surface conformal array blind polarization direction-of-arrival estimation method. The method comprises the following steps of 1, performing of data modeling on a conical surface conformal array antenna snapshot; and 2, a real-valued blind polarization direction-of-arrival estimation method. According to the new algorithm, the subspace estimation process is subjected to real-valued processing, the problem of mirror image blur caused by covariance matrix splitting is solved through subarray segmentation design, the Cramer-Rao bound of parameter estimation is deduced, and the algorithm complexity is reduced on the premise that DOA estimation precision is guaranteed.

Description

technical field [0001] The invention relates to signal and information processing technology, in particular to a blind polarization direction-of-arrival estimation method of a cone conformal array. Background technique [0002] In modern wireless communication systems, conformal array antennas have become an important field in the field of antennas because they can conform to the surface of high-speed carrier platforms such as aircraft, missiles, and satellites without destroying the carrier's shape, structure, and aerodynamic characteristics. Research hotspots. Among them, the coupling of incoming signal polarization characteristics and azimuth information is the difficulty of conformal array antenna estimation, and the direction of arrival (DOA) estimation of conformal array mostly adopts the rotation invariant subspace algorithm (Estimation of Signal Parameters via Rotational Invariance Techniques, ESPRIT), to decouple the two-dimensional angular parameters of the future...

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Application Information

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IPC IPC(8): G01S3/14G01S3/46
CPCG01S3/143G01S3/46Y02A90/10
Inventor 梁佳齐子森孟庆微许华李彬彬王聃李文哲黄虎
Owner AIR FORCE UNIV PLA
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