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A multi-user beamforming method with digital-analog hybrid and low feedback amount in fdd mode

A technology of beamforming and feedback volume, which is applied in the multi-user beamforming field of FDD mode digital-analog hybrid low feedback volume, can solve the problem of large feedback volume and achieve the effect of reduced feedback volume and huge performance gain

Active Publication Date: 2020-10-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the large amount of user feedback in the FDD mode of the outdoor millimeter wave channel, the present invention proposes a multi-user beamforming method with digital-analog hybrid and low feedback amount

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  • A multi-user beamforming method with digital-analog hybrid and low feedback amount in fdd mode
  • A multi-user beamforming method with digital-analog hybrid and low feedback amount in fdd mode
  • A multi-user beamforming method with digital-analog hybrid and low feedback amount in fdd mode

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be specially reminded that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions are omitted here.

[0020] Specific embodiments of the present invention are as figure 1 As shown in the system diagram, the embodiment is specifically described as: multi-user system in FDD mode, digital-analog hybrid beamforming system structure, the number of base station antennas is 32, there are 4 radio frequencies, each radio frequency is connected to 32 antennas, and the number of users is 4, assuming that each radio frequency serves 1 user, and each user corresponds to a single antenna.

[0021] Step 1: In the first transmission period, the base station transmits all the cand...

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Abstract

The invention discloses a multi-user beamforming method with low feedback amount of millimeter wave channel digital-analog hybrid in FDD mode, belongs to the technical field of communication anti-jamming, and relates to multiple-input multiple-output technology, multi-user technology and hybrid beamforming technology. In this application, the base station first transmits the candidate codewords. After receiving the codewords, the user selects the codewords with the strongest signal and transmits them to the base station. The base station collects statistics after receiving the codewords returned by the users. In this case, the users who return the same codeword are divided into a group, and then the second candidate codeword transmission is performed to the users in the group. After receiving the candidate codeword, the users in the group select the codeword with the strongest signal, and then send it to In this way, the amount of user feedback can be greatly reduced, and a huge performance gain can be obtained on the premise that only a small amount of interaction time is increased.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, and in particular relates to a multi-user beamforming method with FDD mode digital-analog mixing and low feedback amount. It involves a Multiple Input Multiple Output (Multiple Input Multiple Output, MIMO) technology, a Multi-User MIMO (Multi-User MIMO, MU-MIMO) technology, and a Hybrid Beamforming (Hybrid Beamforming) technology. Background technique [0002] The digital-analog hybrid beam training system based on beam scanning proposed by Datang Corporation requires the base station to transmit all codewords sequentially before a data transmission cycle starts, and then each user receives the optimal K codewords for it The sequence numbers of these codewords are fed back to the base station, and the received signal strength corresponding to these codewords is also fed back. The base station calculates the channel capacity corresponding to these codewords according to the feed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/0417H04B7/0452H04B7/06H04B7/08
CPCH04B7/0417H04B7/0452H04B7/0456H04B7/0617H04B7/086
Inventor 李尤雷霞何东晓肖悦庞亚闪原艳南
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA