Results 171 to 180 of about 1,380,112 (215)
Some of the next articles are maybe not open access.
Online Channel Estimation for Hybrid Beamforming Architectures
ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020Hybrid analog-/digital beamforming architectures are a promising means of reducing power consumption and hardware costs in large multi-antenna transceivers. However, channel estimation becomes more complicated compared with conventional (fully-digital) architectures because multiple measurements (pilots in subsequent time slots) are required to ...
Jochen Fink +2 more
openaire +2 more sources
Hybrid analog digital beamforming
2022In recent years, two of the main trends in wireless communication have been higher carrier frequencies and larger antenna arrays. Each trend by itself allows for a significant gain in system performance, but they are difficult to combine. The former trend, higher carrier frequencies in the millimeter-wave (mm-wave) range, offers an unprecedented ...
openaire +2 more sources
New Predistorter Architecture for Hybrid Beamforming Transmitter
2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall), 2020In this paper, we propose a novel subarray digital predistorter (DPD) with timely shared feedback for hybrid beamforming transmitters. This enables a set of power amplifiers (PAs) to be linearized with a single DPD. The output signal in the proposed DPD comprises the weighted combination of the inverse functions of the individual PAs from an array ...
Alexander N. Lozhkin, Toru Maniwa
openaire +2 more sources
Quantization error reduction scheme for hybrid beamforming
2012 18th Asia-Pacific Conference on Communications (APCC), 2012In a multiple-input multiple-output (MIMO) system of a large number of antennas, the requirement of an analog to digital converter (ADC) in each antenna string causes high implementation cost and excessive signal processing. Hence, a hybrid beamforming has been proposed in the literature as a solution.
Taedong Shin +3 more
openaire +2 more sources
Varying the Beamwidth of Hybrid Beamforming for mmWave Communications
2019 IEEE 40th Sarnoff Symposium, 2019Availability of large array usage in millimeter wave communications gives the opportunity to create narrow beams that yield to high antenna gains. However, in some cases, wider beams are of interest in order to increase the coverage area or reduce the outages caused by the channel variations.
Yavuz Yaman, Predrag Spasojevic
openaire +2 more sources
Hybrid adaptive/nonadaptive beamforming for ultrasound imaging
2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013We propose and evaluate a simple yet effective technique of combining nonadaptive and adaptive beamforming methods aimed to achieve high quality of ultrasound images at low computational cost. Our hybrid beamformer automatically switches between nonadaptive and adaptive beamforming of input data vectors, based on the outcome of the comparison of the ...
Mohammed Albulayli, Daler N. Rakhmatov
openaire +1 more source
Advanced Hybrid Beamforming Design for MIMO Systems
2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2018One of the fundamental problems for hybrid beamformer design in MIMO systems is that, in Singular-Value-Decomposition (SVD) based beamforming, the analog beamformer is limited to constant modulus. In order to solve this issue, an algorithm is proposed in this paper. Specifically, the parallel data streams are expressed mathematically, and then the math
Bowen Yang +2 more
openaire +1 more source
Hybrid beamforming for massive MIMO
2018Deployed with a large number of antenna elements, massive multiple-input-multiple-output (MIMO) systems will be an important component of next generation wireless systems, because they provide tremendous increase of spectral efficiency. However, two major challenges hinder the implementation of massive MIMO in a practical system.
openaire +1 more source
Hybrid Beamforming Design for Communication-Centric ISAC
IEEE Sensors Journalpublished
Leonardo Leyva +3 more
openaire +2 more sources
Mixed-Timescale Deep-Unfolding for Joint Channel Estimation and Hybrid Beamforming
IEEE Journal on Selected Areas in Communications, 2022Guanding Yu, Yunlong Cai, Jakob Hoydis
exaly