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In this letter, we show that worst-case robust beamforming, with uncertain weights subject to multiplicative variations, can be cast as a convex optimization problem. We interpret this robust beamform...
A tractable method for robust downlink beamforming in wireless communications
Wireless communication system sound localization noise signal interference ratio
2015/8/10
In downlink beamforming in a multiple-input multiple-output (MIMO) wireless communication system, we design beamformers that minimize the power subject to guaranteeing given signal-to-interference noi...
Robust beamforming via worst-case SINR maximization
Minimum variance beamforming the signal to interference plus noise ratio the parameter estimation error and optimization problems
2015/8/10
Minimum variance beamforming, which uses a weight vector that maximizes the signal to interference plus noise ratio (SINR), is often sensitive to estimation error and uncertainty in the parameters, st...
Optimal Basis For Ultrasound RF Apertures: Applications to Real-Time Compression and Beamforming
ultrasound rf compression beamforming Karhunen-Loeve Transform 2D FFT
2014/12/8
Modern medical ultrasound machines produce enormous amounts of data, as much as several gigabytes/sec in some systems. The challenges of generating, storing, processing and reproducing such voluminous...
Among the many photonic technologies available for antenna beamforming, those which provide flat RF response over a very wideband RF bandwidth, high signal to noise ratio,multiple-beam capabilities an...
Optical Phase and Amplitude Control for Beamforming with Cascades of Gires-Tournois Bragg Grating Filters
Radio frequency photonics Analog optical signal processing
2015/6/8
We report experimental results on an optical beamformer capable of independent amplitude and phase control of RF signals fed to an antenna array. We investigate its performance for beam direction adju...
A Novel Beamforming Technique for Highways Coverage Using High-Altitude Platforms
Novel Beamforming Technique Highways Coverage High-Altitude Platforms
2009/9/4
This paper proposes a novel beamforming technique to form an arbitrary-shaped cell for the high-altitude platforms (HAPs) mobile communications. The new technique is based on pattern summation of indi...