Results 201 to 210 of about 2,958,782 (230)
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Digital beamforming for smart antennas
2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157), 2002An 8-channel digital phased array antenna (PAA) is designed and evaluated for a smart antenna application in the cellular PCS band (1850 MHz to 1990 MHz). Each channel is digitized at the RF carrier frequency using bandpass sampling clocking up to 1.5 Gsps with a 140 MHz bandwidth.
T.W. Nuteson, G.S. Mitchell
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Fully Digital Beamforming Receiver With a Real-Time Calibration for 5G Mobile Communication
IEEE Transactions on Antennas and Propagation, 2019This paper presents a fully digital beamforming receiver (FDBR) using a method that calibrates the signals of all chains in real time, and is targeted for 5G mobile communication.
Dong-Chan Kim +4 more
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Multibeam Generation and Measurement of a DDS-Based Digital Beamforming Array Transmitter at Ka-Band
IEEE Transactions on Antennas and Propagation, 2019In this paper, a Ka-band digital beamforming array transmitter (DBFAT) using direct digital synthesizer (DDS) for millimeter-wave (mmW) applications is proposed.
Yingrui Yu +4 more
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Signal Processing for Digital Beamforming on Transmit in MIMO Radar
2020 Second International Conference on Inventive Research in Computing Applications (ICIRCA), 2020In this paper, the case for a MIMO radar have been considered. MIMO radar is advantageous over the other conventional radars such as higher resolution, improved angle estimation accuracy, the higher number of targets detection, increased array aperture ...
Deepshikha, Anant Raut, A. B. Bazil Raj
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2012
DBF architectures provide significant functionality enhancements for phased array radar. At the current state of digital technology, element-level DBF is often impractical for large arrays operating at high frequencies, so subarray level implementations are commonly used to reduce the digital receiver count.
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DBF architectures provide significant functionality enhancements for phased array radar. At the current state of digital technology, element-level DBF is often impractical for large arrays operating at high frequencies, so subarray level implementations are commonly used to reduce the digital receiver count.
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China Communications, 2019
In a millimeter-wave (mmWave) Massive multiple-input multiple-output (MIMO) systems, full-digital beamforming (i.e., connecting each antenna with a specific radio-frequency (RF) chain) becomes inefficient due to the hardware cost and power consumption ...
Wence Zhang +3 more
semanticscholar +1 more source
In a millimeter-wave (mmWave) Massive multiple-input multiple-output (MIMO) systems, full-digital beamforming (i.e., connecting each antenna with a specific radio-frequency (RF) chain) becomes inefficient due to the hardware cost and power consumption ...
Wence Zhang +3 more
semanticscholar +1 more source
Digital Beamforming Techniques—A Comparison
2018This paper emphasizes on the beamforming techniques used in today’s systems. Multiple beamforming techniques such as the Minimum Variance Distortionless Response (MVDR) and Linear Constraint Minimum Variance (LCMV), to name a few, are used to improve the capacity and data rates of various systems such as cellular system.
Geheshwar Sharma Ramchurn +3 more
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Digital beamforming in sar systems
IEEE Transactions on Geoscience and Remote Sensing, 2003The rapid progression in digital hardware and signal processing capabilities stimulates the development of radar systems. The tendency is to move the digital interface toward the antenna, replacing, whenever possible, analog RF-hardware. Based on software codes, these digital systems are more flexible and easier to reconfigure than RF-hardware.
Younis, M. +2 more
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An Experimental Digital Beamforming Sonar
1977Previous experimental results using a 250-kHz acoustic imaging system show the Potential usefulness of holographic processing in high resolution sonars 1,2 This paper presents the design and preliminary experimental results of a holographic sonar using a linear array, As presently configured, the system consists of a 128-element line array, a single ...
L. C. Granger +2 more
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Towards A Pixel-Level Reconfigurable Digital Beamforming Core for Ultrasound Imaging
IEEE Transactions on Biomedical Circuits and Systems, 2020Ultrasound (US) imaging systems typically employ a single beamforming scheme which is the delay and sum (DAS) beamforming due to its reduced complexity. However, DAS results in images with limited resolution and contrast. The limitations of DAS have been
Gayathri Malamal +1 more
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