Improved ultrasound image quality with pixel-based beamforming using a Wiener-filter and a SNR-dependent coherence factor.
Sign Up to like & getrecommendations! Published in 2021 at "Ultrasonics"
DOI: 10.1016/j.ultras.2021.106594
Abstract: Pixel-based beamforming generates focused data by assuming that the waveforms received on a linear transducer array are composed of spherical pulses. It does not take into account the spatiotemporal spread in the data from the… read more here.
Keywords: wiener filter; coherence factor; based beamforming; pixel based ... See more keywords
Analysis of Photonics-Based RF Beamforming With Large Instantaneous Bandwidth
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2017.2762419
Abstract: Since the photonics-based true time delay could significantly broaden the instantaneous bandwidth of a phased antenna array system, solutions utilizing wideband signals could be enabled to considerably enhance the functionality and performance of RF systems.… read more here.
Keywords: frequency; instantaneous bandwidth; photonics based; photonics ... See more keywords
Stratified Federated Learning-Based Beamforming Design for Heterogeneous IRSs-Aided Networks
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Wireless Communications Letters"
DOI: 10.1109/lwc.2022.3213642
Abstract: This letter considers the beamforming optimization of a heterogeneous intelligent reflective surfaces (IRSs)-aided downlink wireless system. We aim to maximize the achievable sum rate by jointly optimizing the active beamforming at base station (BS) and… read more here.
Keywords: irss aided; federated learning; beamforming design; stratified federated ... See more keywords
Ultrasound Pixel-Based Beamforming With Phase Alignments of Focused Beams
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2017.2685198
Abstract: We previously developed unified pixel-based (PB) beamforming to generate high-resolution sonograms, based on field pattern analysis. In this framework, we found that the transmit waveshape away from the focus could be characterized by two spherical… read more here.
Keywords: resolution; beamforming phase; pixel based; focal depth ... See more keywords
Angle-based beamforming in mmWave massive MIMO systems with low feedback overhead using multi-pattern codebooks
Sign Up to like & getrecommendations! Published in 2019 at "China Communications"
DOI: 10.23919/jcc.2019.09.002
Abstract: The integration of millimeter-wave (mmWave) communications and massive multiple input multiple output (MIMO) techniques is a promising solution to dramatically increase the 5G network throughput. By using large antenna arrays, beamforming can be adopted to… read more here.
Keywords: based beamforming; angle based; massive mimo; feedback overhead ... See more keywords