Results 151 to 160 of about 10,533 (195)
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An improved eigenvector beamformer
ICASSP '84. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005Most techniques for computing beamformer tap weights do so by maximizing the overall signal-to-noise ratio at the system output, where noise includes both thermal noise and directional interference. This is the optimal solution if the two noise sources count equally.
Todd K. Citron, Thomas Kailath
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On a modified Duvall beamformer
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003The authors are concerned with the use of derivative null constraints in an adaptive beamformer in the spatial and frequency domains with respect to the Duvall beamformer to obtain a modified Duvall beamformer. Simulation results demonstrate that the modified beamformer's performance is improved under the following conditions:L jammer frequencies are ...
B. Chang, N. Ahmed
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Source localization and beamforming
IEEE Signal Processing Magazine, 2002Distributed sensor networks have been proposed for a wide range of applications. The main purpose of a sensor network is to monitor an area, including detecting, identifying, localizing, and tracking one or more objects of interest. These networks may be used by the military in surveillance, reconnaissance, and combat scenarios or around the perimeter ...
Joe C. Chen, Kung Yao, Ralph E. Hudson
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IEEE Transactions on Wireless Communications, 2009
This paper investigates the combination of beamforming and channel state information (CSI) smoothing for OFDM. While both can offer significant performance gains, care must be taken when using both of them at the same time. Two different sets of beamforming weights can produce the same beamforming gains but be unsuitable for CSI smoothing due to sudden
Magnus Sandell, Vishakan Ponnampalam
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This paper investigates the combination of beamforming and channel state information (CSI) smoothing for OFDM. While both can offer significant performance gains, care must be taken when using both of them at the same time. Two different sets of beamforming weights can produce the same beamforming gains but be unsuitable for CSI smoothing due to sudden
Magnus Sandell, Vishakan Ponnampalam
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The Journal of the Acoustical Society of America, 2012
There is a great variety of beamforming techniques that can be used for localization of sound sources. The differences among them usually lie in the array layout or in the specific signal processing algorithm used to compute the beamforming output.
Antoni, Torras-Rosell +2 more
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There is a great variety of beamforming techniques that can be used for localization of sound sources. The differences among them usually lie in the array layout or in the specific signal processing algorithm used to compute the beamforming output.
Antoni, Torras-Rosell +2 more
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Transfer Beamforming via Beamforming for Transfer
IEEE Transactions on Mobile Computing, 2023Xueyuan Yang +3 more
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Opportunistic Beamforming with Single Beamforming Matrix for Virtual Antenna Arrays
2011 IEEE International Conference on Communications (ICC), 2011Opportunistic beamforming is a promising technique for downlink channels in cellular systems. When opportunistic beamforming is to support multiple users at a time, it is important to form multiple beams with as little interference as possible. In the conventional approach with limited feedback of channel state information from users, the best ...
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A framework for beamforming structures
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1987A framework for describing linearly constrained minimum variance (LCMV) beamforming structures is presented. The framework results from factoring the processor impulse response into a weight vector and a matrix which describes the structure. Classes of structures with equivalent steady-state and adaptive performance are discussed.
Barry D. Van Veen, Richard Roberts
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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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Multiresolution Quadtree Beamformer
IEEE International Conference on Acoustics Speech and Signal Processing, 2002The delay-sum beamformer (DSBF) is a space-time domain beamforming,method that performs coherent summation of sensor data. However, the computational complexity of finding the steered response over all angles is O(N3). In this paper, an O(N2log 2 N) space-time domain beamforming algorithm it is proposed.
Seung-Mok Oh, James H. McClellan
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