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Hybrid precoding energy efficiency optimization method of millimeter wave MIMO-OFDM communication system

A technology of communication system and optimization method, which is applied in modulation carrier system, transmission system, multi-frequency code system, etc., can solve problems such as difficulty in solving hybrid precoding scheme, and achieve the effect of optimal energy efficiency, improved energy efficiency, and simple calculation process.

Active Publication Date: 2019-09-06
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a hybrid precoding energy efficiency optimization method for a millimeter wave MIMO-OFDM communication system, which is used to solve the technical problem that is difficult to solve in the existing millimeter wave MIMO-OFDM communication system with a hybrid precoding scheme aiming at optimal energy efficiency

Method used

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  • Hybrid precoding energy efficiency optimization method of millimeter wave MIMO-OFDM communication system
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  • Hybrid precoding energy efficiency optimization method of millimeter wave MIMO-OFDM communication system

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Embodiment 1

[0043]A hybrid precoding energy efficiency optimization method 100 for a millimeter wave MIMO-OFDM communication system, such as figure 1 shown, including:

[0044] Step 110, obtaining the maximum transmission power of the base station of the millimeter wave MIMO-OFDM communication system and the channel matrix corresponding to each subcarrier;

[0045] Step 120, based on the maximum transmission power and each channel matrix, with the goal of optimizing the energy efficiency of the base station, obtain the power allocation value corresponding to each data stream under each subcarrier, and form a subcarrier power allocation scheme;

[0046] Step 130, based on the subcarrier power allocation scheme and target, solve the hybrid precoding matrix to obtain the digital precoding matrix for each subcarrier and the analog precoding matrix applicable to all subcarriers.

[0047] The hybrid precoding technology based on the joint coding of digital baseband and radio frequency link can...

Embodiment 2

[0145] A storage medium, in which instructions are stored, and when the computer reads the instructions, the computer is made to execute any one of the hybrid precoding energy efficiency optimization methods for the millimeter-wave MIMO-OFDM communication system described above.

[0146] The relevant technical solutions are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a hybrid precoding energy efficiency optimization method of a millimeter wave MIMO-OFDM communication system. The hybrid precoding energy efficiency optimization method comprises the following steps: acquiring the maximum transmitting power of a millimeter wave MIMO-OFDM communication system base station and a channel matrix corresponding to each subcarrier; on the basis ofthe maximum transmitting power and each channel matrix, solving to obtain a power distribution value corresponding to each data stream under each subcarrier by taking the optimal energy efficiency ofthe base station as a target to form a subcarrier power distribution scheme; and obtaining a digital precoding matrix of each subcarrier and an analog precoding matrix suitable for all subcarriers based on the subcarrier power distribution scheme and the optimal energy efficiency target. According to the method, under the condition that the transmitting power of the base station is limited, a power distribution scheme and a hybrid precoding scheme which enable the energy efficiency to be optimal are provided. The combined design problem of hybrid precoding under broadband millimeter waves issolved, the energy efficiency is improved to the maximum extent, and compared with an existing all-digital zero-forcing precoding scheme, the energy efficiency of a millimeter wave MIMO-OFDM communication system is effectively improved while the network capacity performance is considered.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a hybrid precoding energy efficiency optimization method of a millimeter wave MIMO-OFDM communication system. Background technique [0002] The goal of mobile communication network development is higher transmission rate and larger capacity. Millimeter wave, large-scale MIMO (Multiple Input Multiple Output, multiple input multiple output), OFDM (Orthogonal Frequency-Division Multiplexing, orthogonal frequency division multiplexing), ultra-dense network and other technologies are considered to be the key technologies used in 5G networks. The introduction of these technologies can greatly improve the performance of the network capacity, transmission rate, and available spectrum resources. [0003] However, at the same time, the energy consumption of the entire system has also increased sharply, and the high energy consumption of wireless communication sy...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/0426H04L27/26
CPCH04B7/0426H04B7/0456H04L27/2601Y02D30/70
Inventor 葛晓虎何元渊李强钟祎
Owner HUAZHONG UNIV OF SCI & TECH
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