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Methods and systems for hybrid beamforming for MIMO communications

A hybrid beam, single-user technology, applied in transmission systems, radio transmission systems, special data processing applications, etc., can solve problems such as consuming large resources

Active Publication Date: 2021-11-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current designs of hybrid beamformers may require significant resources to convey feedback about the channel state between the hybrid BF receiver and the transmitter
For example, current designs of hybrid beamformers may require instantaneous and well-established channel state information at the transmitter, implying that feedback communication from the receiver may be resource-intensive

Method used

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  • Methods and systems for hybrid beamforming for MIMO communications
  • Methods and systems for hybrid beamforming for MIMO communications
  • Methods and systems for hybrid beamforming for MIMO communications

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Embodiment Construction

[0039] The demand for bandwidth in wireless communications is currently growing rapidly. With the expected future development of high-bandwidth demanding applications such as real-time augmented reality and the Internet of things (IoT), it becomes important to provide technologies that can obtain high-data-rate wireless links and large bandwidths. Millimeter wave (mmWave) technology has attracted interest to address this need. The term millimeter wave is generally used to refer to frequencies having wavelengths between about 10 millimeters to about 1 millimeter (about 30 gigahertz to about 300 gigahertz). Slightly lower frequencies, such as 28 GHz, may also be considered part of the mmWave band, even though the wavelength may exceed 10 mm.

[0040] However, mmWave communication has some limitations. One limitation is that when wireless systems operate in high carrier frequency bands (eg, the 60 GHz band), significant radio signal power propagation losses (compared to lower f...

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Abstract

Methods and apparatuses for hybrid beamforming are described. The described methods and apparatuses related to hybrid beamforming for single user multiple-input multiple-output (SU MIMO) communications and for multi-user multiple-input single-output (MU MISO) communications. The radio frequency (RF) precoder and baseband precoder are determined such that the hybrid precoder has a minimum or near minimum chordal distance from an optimal precoder. Feedback information enables the transmitter to select columns from a set of discrete Fourier transform (DFT) columns to form the RF precoder matrix.

Description

technical field [0001] The present disclosure relates to methods and systems for hybrid beamforming, which is applicable to multiple-input multiple-output (MIMO) communications including massive MIMO communications. Background technique [0002] Millimeter-wave (mmWave) technology has recently drawn attention to the urgent need to realize high-data-rate wireless links and meet the increasing bandwidth demands of data applications. However, mmWave systems can experience significant path loss compared to low-band systems. [0003] Massive Multiple-Input Multiple-Output (MIMO) technology has been proposed as a solution to overcome this shortcoming of mmWave systems. The small wavelength of mmWave systems helps facilitate the use of massive MIMO technology. The short wavelength allows the size of the antennas (also known as radiating elements or radiators) in the antenna array to be relatively small, enabling a large number of antennas to be implemented in the antenna array, w...

Claims

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Application Information

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IPC IPC(8): H04B7/0456
CPCH04B7/0617H04B7/0639H04B7/086H04B7/0868G06F17/141H04B7/0456H04B7/0417
Inventor 艾哈迈德·瓦格迪·阿卜杜勒瓦哈布·沙班穆罕默德·乌萨马·达门辛岩区国琛
Owner HUAWEI TECH CO LTD
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