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Beamforming Method Based on Spatial Spectrum Reconstruction and Steering Vector Direct Estimation

A technology of spatial spectrum reconstruction and steering vector, which is applied in the field of array antenna beamforming, can solve the problem of low accuracy, achieve the effect of accelerating efficiency, good suppression ability, and improving reconstruction accuracy

Active Publication Date: 2020-06-23
ROCKET FORCE UNIV OF ENG
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Problems solved by technology

[0004] The purpose of the present invention is to provide a beamforming method based on spatial spectrum reconstruction and direct estimation of steering vectors to solve the problem of low precision in beamforming methods in the prior art

Method used

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  • Beamforming Method Based on Spatial Spectrum Reconstruction and Steering Vector Direct Estimation
  • Beamforming Method Based on Spatial Spectrum Reconstruction and Steering Vector Direct Estimation
  • Beamforming Method Based on Spatial Spectrum Reconstruction and Steering Vector Direct Estimation

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Embodiment 2

[0060] In this embodiment, the beamforming method provided by the present invention is tested and verified. A one-dimensional linear array antenna containing 10 array elements is used. The distance between the array elements is half a wavelength d, and the first array element on the left side of the array antenna is Referring to the array element, the standard position of the array element is (i-1)d, assuming that the array element position error obeys the normal distribution d'~N(0,0.003). During the test, the collected signal is set to include 1 desired signal and 2 interference signals, and their incident directions are θ 0 = 10°, θ 1 = -30° and θ 2 =+40°, the expected signal-to-noise ratio SNR of the incident antenna = 10dB, and the interference-to-noise ratio INR of the incident interference signal 1 =INR 2 =40dB, the number of snapshots collected is 30, and the initial measurement direction of the desired signal is θ′ 0 =8.9°.

[0061] In order to verify the effecti...

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Abstract

The invention discloses a wave beam forming method based on spatial spectrum reconstruction and steering vector direct estimation. Through reconstructing an interference and noise covariance matrix and convexly optimizing and estimating a desired signal steering vector, a robust adaptive wave beam is acquired and a weight vector is formed so as to obtain an output quantity of an optimal wave beam former. An array antenna wave beam forming method based on interference and noise covariance reconstruction provided in the invention has better comprehensive robustness, especially under the conditions of a DOA estimation error and different input interference-signal rates INR, an algorithm has a better restraining ability to the interference, an output signal to interference plus noise power ratio is high and a calculation speed is faster.

Description

technical field [0001] The invention relates to an array antenna beamforming method, in particular to a beamforming method based on spatial spectrum reconstruction and direct estimation of steering vectors. Background technique [0002] Beamforming technology is an important research direction of array signal processing. By processing the signals output by array antennas, corresponding beams in different directions will be formed. By using beamforming, desired signals can be extracted, noise and interference signals can be suppressed, and the array can be improved. The signal-to-noise ratio of the output signal and the beamforming performance determine the performance of the array signal processing system. [0003] In the prior art, the actual value of the interference-plus-noise covariance matrix and the desired signal-steering vector is used to obtain the array antenna beam. In the prior art, when the interference-plus-noise covariance matrix is ​​calculated, the reconstru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14
CPCG01S3/143
Inventor 杨剑卢建杨波沈瑞冰侯博李传祥卢瑞涛赵曦晶
Owner ROCKET FORCE UNIV OF ENG
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