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

Robust beam forming design method under non-ideal channel in intelligent reflector-assisted communication

An auxiliary communication and beamforming technology, applied in the directions of space transmit diversity, radio transmission system, transmission monitoring, etc., can solve the problems of high hardware cost, high circuit energy consumption, large delay training overhead, etc., to achieve strong anti-interference ability, Spectrally efficient, low-complexity effects

Pending Publication Date: 2022-04-01
SOUTH CHINA UNIV OF TECH +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The proliferation of the fifth generation (5G) is driving a paradigm shift in wireless technologies such as massive multiple-input multiple-output (MIMO) and millimeter wave (mmWave), which can achieve high spectral efficiency (SE) by exploiting highly directional beamforming. But , since the directional mmWave link is easily blocked, a large number of active antenna arrays and RF chains are required, which may lead to excessive circuit energy consumption and high hardware cost
However, considering the case of high mobility and fast time-varying channels, the transmitter may only obtain partial or outdated CSI
This inevitably leads to signal misalignment in RIS-assisted wireless networks
Since the CSI of reflective beamforming at RIS is obtained through a feedback link to multiple users (UEs), knowledge of the CSI of reflective beamforming at RIS will result in large delays and significant training overhead

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
  • Robust beam forming design method under non-ideal channel in intelligent reflector-assisted communication
  • Robust beam forming design method under non-ideal channel in intelligent reflector-assisted communication
  • Robust beam forming design method under non-ideal channel in intelligent reflector-assisted communication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] like figure 1 As shown, this embodiment provides a method for designing robust beamforming under non-ideal channels in intelligent reflector-assisted communication, including the following steps:

[0138] S1: The constructed system includes a MIMO system based on an IRS-assisted system model, where the IRS is equipped with reflective elements and deployed between BSs and UEs. Since each transmission link has a different number of data streams and passes through different reflection paths between the BS-RIS and RIS-UE links, the location of the RIS has an impact on each transmission link. Therefore, finding a suitable RIS layout location can further improve communication performance, and layout optimization and CSI errors must be considered when designing RIS-assisted beamforming schemes.

[0139] In this embodiment, in step S1, a multi-antenna base station is deployed based on the IRS-assisted MIMO system to serve K single-antenna terminals. like figure 2 As shown, ...

Embodiment 2

[0284] This embodiment provides a robust beamforming design system under non-ideal channels in intelligent reflector-assisted communication, including a MIMO system building module, an optimization performance module, a channel model building module, a RIS-assisted beamforming design and problem formulation module, Design Criteria Building Blocks, Optimization Problem Formulation Blocks and Solving Blocks;

[0285] In this embodiment, the MIMO system building block is used to construct a MIMO system based on a system model assisted by an intelligent reflective surface RIS, and the intelligent reflective surface RIS is equipped with reflective elements and is deployed between the BS and UEs;

[0286] In this embodiment, the optimization performance module is used to establish system phase shift, optimal configuration and incomplete channel model to optimize system performance,

[0287] In this embodiment, the channel model building module is used to design an intelligent reflec...

Embodiment 3

[0293] This embodiment provides a storage medium, the storage medium can be a storage medium such as ROM, RAM, magnetic disk, optical disk, etc., the storage medium stores one or more programs, when the program is executed by the processor, the intelligent reflective surface of the first embodiment is realized Robust Beamforming Design Method for Nonideal Channels in Assisted Communications.

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 discloses a robust beam forming design method under a non-ideal channel in intelligent reflector-assisted communication, which researches the robust beam forming design of an RIS-assisted multi-user millimeter wave system with incomplete CSI (Channel State Information), and proposes a weighting and rate maximization problem. To jointly optimize the transmit beamforming of the BS, the arrangement of the RIS, and the reflected beamforming of the RIS. The considered WSM maximization problem comprises a channel estimation error, a bandwidth and an RIS arrangement variable, and is a complex non-convex optimization problem. According to the method, an original problem is decoupled into a series of sub-problems, iterative optimization is performed on position, bandwidth, channel error, transmitted beam forming and passive beam forming, and performance loss caused by the influence of imperfect CSI is relieved based on an alternative optimization algorithm of penalty and gradient projection. The method has the advantages of high spectrum efficiency, low complexity, strong anti-interference capability and the like, and the performance of the existing wireless communication can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a robust beamforming design method under non-ideal channels in intelligent reflecting surface assisted communication. Background technique [0002] The proliferation of the fifth generation (5G) is driving a paradigm shift in wireless technologies such as massive multiple-input multiple-output (MIMO) and millimeter wave (mmWave), which can achieve high spectral efficiency (SE) by exploiting highly directional beamforming. But , since the directional mmWave link is easily blocked, a large number of active antenna arrays and radio frequency chains are required, which may lead to excessive circuit energy consumption and high hardware cost. To realize the potential of mmWave MIMO communication at the lowest possible hardware cost, reconfigurable intelligent surface (RIS) as a promising technology has great potential for performance enhancement beyond 5G and 6G networks...

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
IPC IPC(8): H04B7/06H04B7/0413H04B17/391
Inventor 陈真邱小群林楚婷
Owner SOUTH CHINA UNIV OF TECH