New beamformer for coherent signal reception in the presence of uncorrelated interferences

Zhao, Yue; Shui, Peng‐Lang

doi:10.1109/mape.2009.5355951

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Therefore, the other strategy of coherent signal beamforming is to take the multipath signal as the useful signal like the direct signal. In reference [32], an adaptive weight vector was obtained for coherent signal receiving based on the composite steering vector of coherent multipath signals estimated by utilizing the transformation matrix which was constructed by the DOA of uncorrelated interference. Two beamforming algorithms were present in [33] with forcing the array responses to the pre-estimated angle clusters of the coherent multipath signal no less than unity while minimising the output power.…”

Section: Introductionmentioning

confidence: 99%

An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving

Guo

Zhang

et al. 2022

Remote Sensing

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Within a complex sea or ground surface background, multipath signals are strongly correlated or even completely coherent, which leads to signal cancellation when conventional optimal beamforming is performed. Aiming at the above problem, a coherent signal-receiving algorithm is proposed based on oblique projection technology in this paper. The direction of arrival (DOA) of incident signals is estimated firstly by the space smoothing-based MUSIC method. The composite steering vector of multipath coherent signals is then obtained utilizing the oblique projection matrix constructed with the estimated angles. The weight vector is thereby derived with the minimum variance distortionless response criteria. The proposed oblique projection-based beamformer can receive the multipath coherent signals effectively. Moreover, the proposed beamformer is more robust and converges to optimal beamformer rapidly without aperture loss. The theoretical analysis and simulation verify the validity and superiority of the proposed coherent signal beamformer.

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Section: Introductionmentioning

confidence: 99%

An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving

Guo

Zhang

et al. 2022

Remote Sensing

View full text Add to dashboard Cite

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GNSS multipath suppression technology based on postcorrelation and independent component analysis

Ding

2022

PLoS ONE

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In urban and other complex environments, satellite navigation signals are vulnerable to multipath interference, especially medium- and short-delay multipath interference, which seriously affects the positioning accuracy. Aiming at the problem that the effect of traditional methods on medium and short multipath suppression is not obvious and it is difficult to accurately estimate the direction of arrival (DOA) when beamforming is used, a multipath suppression scheme based on a postcorrelation and independent component analysis (ICA) algorithm is proposed in this paper. First, the satellite navigation signal on each array element is despread and demodulated by postcorrelation technology to improve the signal-to-noise ratio (SNR), and then the direct signal component is directly extracted by the ICA algorithm to filter the noise while suppressing the multipath interference. Simulation results show that this method can effectively suppress medium and short multipath interference when the SNR of satellite navigation signals is as low as -30 dB, significantly improve the SNR of navigation messages and reduce the bit error rate, which provides a new solution for global navigation satellite system (GNSS) multipath suppression.

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New beamformer for coherent signal reception in the presence of uncorrelated interferences

Cited by 2 publications

References 11 publications

An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving

An Oblique Projection-Based Beamforming Method for Coherent Signals Receiving

GNSS multipath suppression technology based on postcorrelation and independent component analysis

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