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Related Experiment Video

Updated: Dec 25, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Robust Null Broadening Beamforming Based on Covariance Matrix Reconstruction via Virtual Interference Sources.

Jian Yang1,2, Jian Lu2, Xinxin Liu2

  • 1School of Electronic Engineering, Xidian University, Xi'an 710071, China.

Sensors (Basel, Switzerland)
|April 2, 2020
PubMed
Summary

This study introduces a novel beamforming method to maintain interference suppression performance despite rapid jammer or platform movement. The technique reconstructs the interference-plus-noise covariance matrix to broaden nulls, ensuring robust signal processing.

Keywords:
beamformingcovariance matrix reconstructionnull broadeningvirtual interference sources

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Area of Science:

  • Signal Processing
  • Adaptive Beamforming
  • Array Signal Processing

Background:

  • Rapid movement of jammers or antenna platforms degrades interference suppression.
  • Interference signals moving out of the array beampattern nulls cause performance loss.

Purpose of the Study:

  • To propose a novel null broadening beamforming method.
  • To address performance degradation caused by moving interference signals and platform motion.

Main Methods:

  • Reconstruction of the interference-plus-noise covariance (INC) matrix.
  • Introduction of virtual interference sources to broaden nulls.
  • Solving a convex optimization problem to obtain the desired signal steering vector.

Main Results:

  • The proposed beamformer effectively broadens null width and deepens null depth.
  • Demonstrated robust interference cancellation against fast-moving jammers and platform motion.
  • Null depth is controllable via power parameters and knowledge of interference motion.

Conclusions:

  • The novel beamforming method enhances robustness in dynamic environments.
  • Effective for scenarios with fast-moving jammers or high-speed platform movement.
  • Offers adjustable null depth for optimized interference suppression.