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Hybrid beam design method of MIMO-OFDMA terahertz communication system

A MIMO-OFDMA and communication system technology, applied in the field of hybrid beam design, can solve problems such as weak diffraction ability of terahertz signals and obstacle blocking

Active Publication Date: 2021-01-15
ZHENGZHOU UNIV
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Problems solved by technology

[0004] Aiming at the deficiencies in the above-mentioned background technology, the present invention proposes a hybrid beam design method for a MIMO-OFDMA terahertz communication system, which solves the technical problem that the terahertz signal has weak diffraction ability and is easily blocked by obstacles

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[0107]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0108] The present invention proposes a hybrid beam design method for a MIMO-OFDMA terahertz communication system. First, an intelligent reflector-assisted MIMO-OFDMA terahertz communication system is designed, wherein the base station adopts a sparse RF chain structure to reduce circuit power consumption. At the same time, Orthogonal Frequency Division Multiplexing (OFDM) is also used in consideration of the possible frequency selective fading of wideband THz s...

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Abstract

The invention provides a hybrid beam design method of an MIMO-OFDMA terahertz communication system, which is used for solving the technical problems that a terahertz signal is weak in diffraction capability and is easily blocked by an obstacle. The method comprises the following steps: firstly, calculating a transmission signal received by a user on a subcarrier according to a THz communication system and a system sparse RF chain antenna structure; secondly, calculating the achievable transmission rate of the user on the subcarrier according to the transmission signal, and constructing a ratemaximization function of the THz communication system; and finally, performing optimization iteration on the rate maximization function by using an alternating iterative optimization algorithm to obtain a rate maximum value of the THz communication system. A base station of the THz communication system adopts a sparse radio frequency chain structure to reduce the circuit power consumption; meanwhile, orthogonal frequency division multiplexing is adopted to reduce frequency selective fading of broadband THz signals; weighting and rate maximization of the system are achieved by jointly optimizing hybrid analog / digital beamforming of the base station and a reflection matrix of the IRS.

Description

technical field [0001] The present invention relates to the technical field of terahertz communication, in particular to a hybrid beam design method of a MIMO-OFDMA terahertz communication system. Background technique [0002] With the rapid development of various new applications such as virtual reality, augmented reality, and telemedicine, the demand for data rates in future wireless communications will show explosive growth, so Sub-6G and millimeter waves may not be able to support such high rate demands. Terahertz (THz, terahertz) communication (0.1-10THz) is considered to be the most promising technology to solve this problem due to its ultra-wide bandwidth. [0003] Multiple-input multiple-output (MIMO, Multiple-input multiple-output) can form high-gain beams, and is considered to be an effective technology for improving THz signal strength. Research has proven that the strength of a wireless signal grows linearly with the number of base station antennas. At the same...

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0456H04B7/06H04L27/26
CPCH04B7/0413H04B7/0456H04B7/0617H04B7/0626H04L27/2601Y02D30/70H04B7/04013
Inventor 郝万明谢金坤孙钢灿
Owner ZHENGZHOU UNIV
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