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Robustness transmission design method of intelligent reflection surface assisted D2D communication system

A reflective surface and communication system technology, applied in the field of communication, can solve problems such as limited signal processing capability, less research on IRS-D2D communication system, and system performance loss, so as to improve system reliability, optimize user transmission rate, and improve robustness sexual effect

Inactive Publication Date: 2021-11-02
浙江以正通信技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in a large number of literatures, the research is based on the case of perfect channel state information (CSI, Channel State Information), but in fact, due to the limited signal processing capability of the reflective elements of the smart reflective surface, the smart reflective surface does not use any radio frequency link , and the passive beamforming of smart reflective surfaces is highly dependent on the acquired CSI, so it is challenging to obtain accurate CSI in wireless communication systems assisted by smart reflective surfaces, and most of the existing research focuses on smart The channel estimation aspect of the reflective surface-related channel and the integration of intelligent reflective surfaces as auxiliary communication into various wireless communication systems, there are few studies on IRS-D2D communication systems under imperfect CSI
And if the channel is regarded as a perfect channel, this will lead to a certain loss of system performance

Method used

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  • Robustness transmission design method of intelligent reflection surface assisted D2D communication system
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  • Robustness transmission design method of intelligent reflection surface assisted D2D communication system

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specific Embodiment 1

[0080] A robust transmission design method for a smart reflective surface assisted D2D communication system in the present application, first establishes a smart reflective surface assisted D2D communication system model, and conducts research based on this model.

[0081] Smart reflective surfaces assist D2D communication system models, such as figure 1 As shown, including base stations, cellular users and K pairs of D2D user pairs, with MISO (Multiple Input Single Output, Multiple Input Single Output) wireless communication and D2D communication scenarios, D2D users use the underlay mode to multiplex the downlink spectrum resources of the cellular communication link , the base station is equipped with N antennas, the cellular user equipment (CUE) and K pairs of D2D user pairs are respectively equipped with a single antenna, and the smart reflective surface has M reflective elements. A controller is installed on the smart reflective surface to control the reflection coefficie...

specific Embodiment 2

[0190] An embodiment of the present invention provides a terminal device for robust transmission design of an intelligent reflective surface assisted D2D communication system. The terminal device in this embodiment includes: a processor, a memory, and a A computer program running on a processor, and the processor implements the method in Embodiment 1 when executing the computer program.

[0191] Exemplarily, the computer program can be divided into one or more modules / units, and the one or more modules / units are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the robust transmission design terminal of the computer program on the intelligent reflective surface assisted D2D communication system Execution process in the device. For example, the computer program c...

specific Embodiment 3

[0198] The robust transmission design of the smart reflective surface assisted D2D communication system. If the integrated module / unit of the terminal equipment is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable in the storage medium. Based on this understanding, the present invention realizes all or part of the processes in the methods of the above embodiments, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer When the program is executed by the processor, the steps in the above-mentioned various method embodiments can be realized. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form. The computer-readable medium may include: any entity or ...

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Abstract

The invention discloses a robustness transmission design method of an intelligent reflection surface-assisted D2D communication system, and relates to the technical field of communication, and the method comprises the steps: building an intelligent reflection surface-assisted D2D communication system model and an imperfect channel model, building a robust optimization problem based on the imperfect scene of channel state information, processing an optimization problem containing channel parameter uncertainty by utilizing matrix knowledge and a convex optimization theory, converting a semi-infinite constraint condition into a convex constraint, decomposing a robust problem of minimum power into two sub-problems for solving by adopting a BCD algorithm and an S-process theorem, and obtaining a robust power allocation scheme by iterating the two sub-problems; and establishing a resource allocation scheme of the intelligent reflection surface D2D communication system, so the user communication interruption is effectively reduced, and the robustness of the system is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a robust transmission design method for an intelligent reflective surface assisted D2D communication system. Background technique [0002] At present, the smart reflective surface is a planar array composed of a large number of low-cost passive passive reflective elements, which is placed between the transmitting end and the receiving end. Each reflective element independently adjusts the phase of the incident signal to change the end-to-end (D2D, Device-to-Device) signal propagation direction, so that the user can better receive the signal sent by the base station. By adjusting the beam, the reflection signal of the smart reflective surface and the signals of other paths cancel each other out, and eliminate the interference signals of other channels, because the smart reflective surface eliminates the use of radio frequency links and only works within a short dist...

Claims

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Application Information

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IPC IPC(8): H04W4/70H04W52/38H04W72/04H04B7/0426H04B7/06H04B17/391H04L25/02G06F30/20
CPCH04W4/70H04W72/0473H04W52/383H04B7/043H04B7/0626H04B17/391H04L25/024G06F30/20G06F2111/04
Inventor 徐齐钱
Owner 浙江以正通信技术有限公司
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