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Wireless energy-carrying communication hybrid precoding design method based on intelligent reflecting surface

A technology of wireless energy-carrying communication and design method, which is applied in the direction of radio transmission system, energy consumption reduction, sustainable communication technology, etc., to achieve excellent effectiveness and robustness, improve speed performance, and reduce complexity

Active Publication Date: 2022-03-11
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since both the BS transmit beamforming vector and the RIS discrete phase shift are strongly coupled under the objective function and constraints of the max-min SINR problem, this joint optimization problem is usually non-convex and NP-hard, with a global optimal The derivation of the solution remains an open and meaningful challenge

Method used

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  • Wireless energy-carrying communication hybrid precoding design method based on intelligent reflecting surface
  • Wireless energy-carrying communication hybrid precoding design method based on intelligent reflecting surface
  • Wireless energy-carrying communication hybrid precoding design method based on intelligent reflecting surface

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Embodiment 1

[0106] like figure 1 As shown, a hybrid precoding design method for wireless energy-carrying communication based on an intelligent reflector includes the following steps:

[0107] S1. Build a RIS-assisted multi-user SWIPT system, such as figure 2 As shown, the received signal of the system is collected, and the channel in the system is modeled;

[0108] In this embodiment, the process of step S1 is as follows:

[0109] In a multi-user SWIPT system equipped with RIS, a base station BS (including N t = 64 antennas, using M t RF chains), K=4 information user IU (including N r Antenna, use M r RF chains), and M energy harvesting users EU (including N r = 16 antennas). Suppose BS sends N to IU s data streams, each IU receives d data streams, and the transmitted data streams satisfy Kd=N s ≤M t ≤N t and d≤M r ≤N r constraints. Furthermore, for the hybrid precoder and combiner joint design method, N s data streams are N t × M t digital beamformer processed, and by...

Embodiment 2

[0200] This embodiment provides a wireless energy-carrying communication hybrid precoding design system based on an intelligent reflector, including: a multi-user SWIPT system building module, a received signal acquisition module, a channel modeling module, a spectrum efficiency and energy demand analysis module, and joint optimization Model building block, decoupling block, matrix factorization block, analog precoder and combiner design block, linear approximation block, iterative optimization block, output block;

[0201] In this embodiment, the multi-user SWIPT system building block is used to construct a RIS-assisted multi-user SWIPT system;

[0202] In this embodiment, the received signal collection module is used to collect the received signal of the multi-user SWIPT system;

[0203] In this embodiment, the channel modeling module is used to model the channel in the multi-user SWIPT system;

[0204] In this embodiment, the spectrum efficiency and energy demand analysis ...

Embodiment 3

[0213] This embodiment provides a storage medium. The storage medium may be a storage medium such as ROM, RAM, magnetic disk, or optical disk. The storage medium stores one or more programs. When the program is executed by the processor, the intelligent reflection-based Hybrid precoding design method for wireless portable energy communication.

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Abstract

The invention discloses a wireless information and power transfer (SWIPT) hybrid precoding design method based on an intelligent reflecting surface, and the method comprises the steps: constructing an RIS-assisted multi-user SWIPT system, collecting a received signal, and carrying out the channel modeling; analyzing the spectral efficiency and the lowest energy collection demand, and establishing a mathematical model for joint optimization of a hybrid precoder and a combiner based on a sum rate maximization problem; a non-convex original problem is decoupled into an analog sub-problem and a digital sub-problem, an analog precoding matrix is decomposed into a plurality of vectors, and an analog precoder and a combiner are designed based on a greedy selection algorithm of array response vectors; in a digital processing stage, a first-order Taylor expansion method is utilized to carry out linear approximation on a target function, a suboptimal digital precoder is searched based on an iterative algorithm, and a digital synthesizer is designed based on an MMSE scheme. According to the invention, the sum rate performance of the SWIPT system is effectively improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a hybrid precoding design method for wireless energy-carrying communication based on an intelligent reflective surface. Background technique [0002] Facing the vigorous progress of green communication, environment-friendly energy harvesting technology has also been proposed and gained widespread attention, which can harvest renewable energy from the environment to prolong the service life of equipment. However, natural energy sources are often unstable and unpredictable due to changes in weather and geographical location. Compared with traditional energy harvesting and green communication technologies, wireless power portable communication (SWIPT) technology uses electromagnetic waves to charge devices, and can provide energy for wireless devices while exchanging information with wireless devices. However, the implementation of SWIPT technology is likely to requi...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0456
CPCH04B7/0413H04B7/0456H04B7/046Y02D30/70
Inventor 陈真杜晓宇章秀银唐杰李思航
Owner SOUTH CHINA UNIV OF TECH
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