Results 261 to 270 of about 2,822,972 (301)
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2009
In this chapter, we first review the background, basic principle and structure of adaptive beamformers. Since there are many robust adaptive beamforming methods proposed in literature, for easy understanding, we organize them into two categories from the mathematical point of view: one is based on quadratic optimization with linear and nonlinear ...
Zhu Liang Yu +3 more
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In this chapter, we first review the background, basic principle and structure of adaptive beamformers. Since there are many robust adaptive beamforming methods proposed in literature, for easy understanding, we organize them into two categories from the mathematical point of view: one is based on quadratic optimization with linear and nonlinear ...
Zhu Liang Yu +3 more
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Adaptive beamforming for Doppler signal
2001 CIE International Conference on Radar Proceedings (Cat No.01TH8559), 2002A small number of samples and system errors can degrade the performance of adaptive arrays, particularly when the input signal-to-noise ratio (SNR) is large. A direct signal cancellation method to estimate the interference-noise covariance matrix which increases the SINR by using the desired signal Doppler information is proposed. It has the advantages
Zhang Linrang, Liao Gui-sheng, Bao Zheng
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2001
This chapter presents robust adaptive beamforming techniques designed specifically for microphone array applications. The basics of adaptive beamformers are first reviewed with the Griffiths-Jim beamformer (GJBF). Its robustness problems caused by steering vector errors are then discussed with some conventionally proposed robust beamformers.
Osamu Hoshuyama, Akihiko Sugiyama
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This chapter presents robust adaptive beamforming techniques designed specifically for microphone array applications. The basics of adaptive beamformers are first reviewed with the Griffiths-Jim beamformer (GJBF). Its robustness problems caused by steering vector errors are then discussed with some conventionally proposed robust beamformers.
Osamu Hoshuyama, Akihiko Sugiyama
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Robust Wideband Adaptive Beamforming With Null Broadening and Constant Beamwidth
IEEE Transactions on Antennas and Propagation, 2019In the cases of rapidly moving interference and look-direction error, robustness and output signal to interference and noise ratio (SINR) of conventional wideband adaptive beamforming methods are degraded severely.
Xiaopeng Yang +4 more
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Adaptive Beamforming Assisted ReceiverAdaptive Beamforming
2009Adaptive beamforming is capable of separating user signals transmitted on the same carrier frequency, and thus provides a practical means of supporting multiusers in a space-division multiple-access scenario. Moreover, for the sake of further improving the achievable bandwidth efficiency, high-throughput quadrature amplitude modulation (QAM) schemes ...
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Research on adaptive beamforming algorithm
2012 International Conference on Image Analysis and Signal Processing, 2012Adaptive beamforming is a key technology of smart antenna; the core is to obtain the optimum weights of the antenna array by some adaptive beamforming algorithms, and finally adjust the main lobe to focus on the arriving direction of the desired signal, as well as suppress the interfering signal.
Qiu Dong-dong +4 more
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Deep Learning for Fast Adaptive Beamforming
IEEE International Conference on Acoustics, Speech, and Signal Processing, 2019The real-time nature that makes diagnostic ultrasonography so appealing to clinicians imposes strong constraints on the computational complexity of image reconstruction algorithms. As such, these typically rely on traditional delay-and-sum beamforming, a
Ben Luijten +6 more
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Source-oriented adaptive beamforming
Circuits, Systems, and Signal Processing, 1983A system concept expected to improve sonar multiple target detection and classification performance in severe directional interference environments is presented. Adaptive nulling of undesired strong interference sources and detection of desired weak sources are achieved by utilizing constrained adaptive processing techniquestogether with conventional ...
Salvatore D. Morgera, Andrew C. Callahan
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An alternative approach to linearly constrained adaptive beamforming
, 1982A beamforming structure is presented which can be used to implement a wide variety of linearly constrained adaptive array processors. The structure is designed for use with arrays which have been time-delay steered such that the desired signal of ...
L. Griffiths, C. Jim
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ADS-B Signal Separation Based On Blind Adaptive Beamforming
IEEE Transactions on Vehicular Technology, 2019The automatic dependent surveillance-broadcast (ADS-B) is a surveillance system for air traffic management where aircrafts asynchronously broadcast the position and other information on the same frequency band.
Wenyi Wang, R. Wu, Junli Liang
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