Unlock instant, AI-driven research and patent intelligence for your innovation.

Multiuser beamforming method based on frequency selective channel

A beamforming method and frequency-selective technology, applied in baseband systems, baseband system components, diversity/multi-antenna systems, etc., can solve the problem of high cost of channel estimation

Inactive Publication Date: 2018-09-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most existing beamforming research focuses on flat fading channels
Part of the research on frequency selective channels is also mainly aimed at time division duplex systems, that is, the user channel information is known at the transmitter, but in massive MIMO, the cost of channel estimation is high
According to our current knowledge, there is no research on multi-user beamforming systems with beamforming training mechanism for limited feedback under frequency selective channels

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multiuser beamforming method based on frequency selective channel
  • Multiuser beamforming method based on frequency selective channel
  • Multiuser beamforming method based on frequency selective channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific facilities, so that those skilled in the art can better understand the present invention. It should be noted 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.

[0023] In the following, the number of users U=4 and the number of subbands N f =2 as an example:

[0024] S1. Perform beam training on the user terminal according to a preset beam forming training algorithm.

[0025] S2. On the i-th subband, the u-th user selects the codebook vector with the strongest received signal power

[0026]

[0027] in is the set of codebook vectors, v j is the jth codebook vector in the codebook vector set, is the channel vector of the u-th user on the i-th subband.

[0028] S3. Each user feeds back to the base station the index o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of the wireless communication, specifically a multiuser beamforming method based on a frequency selective channel. The method comprises the following steps: firstly, the base station performs beam training on a user, thereby enabling each user to feed back the optimal beam index of each sub-band, and then the base station designs an analog pre-encodingmatrix capable of simultaneously satisfying beam demands of all sub-bands of all users according to the feedback index, so that a beam training mechanism can be applied to a multi-user system under the frequency selective channel.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and specifically relates to a multi-user beamforming method based on a frequency selective channel. Background technique [0002] Millimeter wave technology and massive multiple-input multiple-output (Muti-Input Multi-Output, MIMO) technology are considered to be part of the key technologies for 5G, and thus have attracted widespread attention from academia and industry. Millimeter waves have a large number of available spectrum resources, and are expected to increase the data transmission rate of the next generation of mobile communications to above Gbps. Combining the propagation characteristics of millimeter waves and the characteristics of large-scale antenna arrays, hybrid precoding technology has become an important signal processing method in millimeter wave massive MIMO systems. It can effectively resist multipath fading and reduce interference between transmission data str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0452H04B7/0456H04B7/08H04L25/02
CPCH04B7/0452H04B7/0456H04B7/088H04L25/0242
Inventor 肖燕平肖悦喻凤
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA