On adaptive LCMV beamforming for multiuser processing in wireless systems

Filho, Danilo Zanatta; Cavalcante, Charles C.; Resende, L.S.; Romano, João Marcos Travassos

doi:10.1109/imoc.2007.4404319

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…The adaptive beamforming device can obtain the distortion-free output of the desired signal by pointing the array pattern in the direction of desired signal, and simultaneously avoid the direction of interference signal, Hence, the directional interference suppression and SNR increase of the array could be realised. In general, adaptive beamformers need to design the beam weights according to certain criteria, such as maximum signal-to-noise ratio criteria, linear constrained minimum variance (LCMV) criteria [52] and minimum mean square error (MMSE) criteria [53]. Early work in the 1976, Washburn and Sweeney used adaptive beamforming techniques on WARF.…”

Section: Clutter Suppression Techniques Based On Spatial Characteristicsmentioning

confidence: 99%

Overview of ionosphere clutter suppression for high frequency surface wave radar (HFSWR) system: Observation, approaches, challenges and open issue

Ji,

Wu,

Yang

et al. 2023

IET Radar Sonar & Navi

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A great interest has been directed towards high frequency surface wave radar (HFSWR), because it is applied as long‐range early warning and real‐time measurements of sea surface condition tools in maritime surveillance. However, the unwanted reflection from the ionosphere (ionosphere clutter) damages the consistent detection performance of HFSWR. Target detection and environmental information extraction from radar echoes are primarily determined by the extent to which the medium contaminates the transmitted signals. Although the ionospheric signal corruption mechanisms are complex and various, a number of eliminating contamination approaches have been developed in the last 50 years. The purpose of this paper is providing an overview of the past and current clutter theoretical models and clutter suppression techniques for HFSWR system. The experimental results involved in the complex long‐term ionosphere observation and ionosphere echo analysis are first discussed. Special attention is paid to the correlation between the signal degradation sources and eliminating clutter techniques. Furthermore, the clutter suppression methods are classified based on the design idea. The specific clutter suppression methods as well as its operation principle are briefly introduced. Finally, several research trends and open issues are presented, with emphasis on the need for proactively controlling the radar design cost and generally agreed‐upon standards.

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Section: Clutter Suppression Techniques Based On Spatial Characteristicsmentioning

confidence: 99%

Overview of ionosphere clutter suppression for high frequency surface wave radar (HFSWR) system: Observation, approaches, challenges and open issue

Ji,

Wu,

Yang

et al. 2023

IET Radar Sonar & Navi

View full text Add to dashboard Cite

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Performance Analysis of Coherent Interference Suppression Schemes by an Adaptive Antenna Array

Elagooz

2009

International Conference on Aerospace Sciences and Aviation Tec

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Rejection of coherent interference requires an array consisting of several identical sub-arrays which operates with spatial smoothing algorithms. For the cases in which such array configuration cannot be obtained, other schemes must be employed to decouple the desired signal and the coherent interference. This paper presents a coherent interference suppression scheme, known as, the complementally transformed minimum variance beamformer, and compare its behavior with the ordinary multiple constrained minimum variance beamformer. It should be noted that both schemes need prior knowledge of the direction of arrival of the interferences. The behavior of both interference suppression schemes are evaluated through computer simulation. The simulation results indicate the advantage of the complementally transformed minimum variance beamformer over the ordinary multiple constrained minimum variance beamformer from the point of view of the degree of coherent interference reduction.

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On adaptive LCMV beamforming for multiuser processing in wireless systems

Cited by 2 publications

References 5 publications

Overview of ionosphere clutter suppression for high frequency surface wave radar (HFSWR) system: Observation, approaches, challenges and open issue

Overview of ionosphere clutter suppression for high frequency surface wave radar (HFSWR) system: Observation, approaches, challenges and open issue

Performance Analysis of Coherent Interference Suppression Schemes by an Adaptive Antenna Array

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