Results 201 to 210 of about 9,393 (232)
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Adaptive beamforming for nonstationary arrays
The Journal of the Acoustical Society of America, 2002Adaptive beamformers automatically adjust to the input data on the sensors in an attempt to maximize the bearing resolution of a signal and minimize the effects of noise or interfering signals. To the author’s knowledge, all adaptive beamformers currently available in the literature assume that the sensors are stationary over the time required to ...
Michael V, Greening, Jane E, Perkins
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A robust adaptive Capon beamforming
Signal Processing, 2006zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liu, Hongqing +2 more
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Transformation-based adaptive array beamforming
Signal Processing, 2000Recently, the generalized eigenspace-based beamformer (GEIB) was proposed to combat the pointing errors and to enhance the convergence speed. The weight vector of the GEIB is generated by projecting the weight vector of the linearly constrained minimum variance beamformer (LCMVB) onto a modified signal subspace. Unfortunately, numerical instability and
Yu, Jung-Lang, Leou, Maw-Lin
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1993
In this chapter we address the important subject of adaptive beamforming or “null-steering” as applied to an adaptive antenna array for the purposes of noise cancellation. The chapter is not intended as a general review or tutorial discussion of the subject. It is concerned solely with the application of systolic arrays to adaptive beamforming networks
T. J. Shepherd, J. G. McWhirter
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In this chapter we address the important subject of adaptive beamforming or “null-steering” as applied to an adaptive antenna array for the purposes of noise cancellation. The chapter is not intended as a general review or tutorial discussion of the subject. It is concerned solely with the application of systolic arrays to adaptive beamforming networks
T. J. Shepherd, J. G. McWhirter
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Multichannel Adaptive Beamforming
2004Multiantenna transceivers have received a considerable attention when developing next generation wireless communication systems. In this chapter we discuss different alternatives of utilizing multiple antennas in commercial wireless communication systems. By multichannel adaptive beamforming we understand a concept where the receiver estimates multiple
Jyri Hämäläinen +2 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 ...
Morgera, Salvatore D. +1 more
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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 monopulse beamforming
Proceedings of the IEEE, 1976A new receive-array adaptive beamformer configuration is presented. The array output signal consists of the difference between a conventionally weighted beam and an adaptive beam that is constrained to have a spatial null in the direction of interest. Adaptation then provides minimum total array output power.
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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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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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