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Standard-orthogonalization-based hybrid pre-coding method for large-scale MIMO system

A standard orthogonalization and precoding technology, applied in transmission systems, radio transmission systems, electrical components, etc., can solve the problem of inability to change the signal amplitude, and achieve the effect of low implementation complexity, no performance loss, and high spectral efficiency.

Active Publication Date: 2017-11-17
广州市埃特斯通讯设备有限公司
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Problems solved by technology

But the analog precoder F can only change the phase of the signal, not the amplitude of the signal

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[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0041] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Such as figure 1 As shown, the standard orthogonalization-based hybrid precoding method of the massive MIMO system provided by the embodiment of the present invention includes the following steps:

[0043] S101: Acquire channel state information between the base station and all user terminals;

[0044] S102: Design a phase-only analog precoding matrix based on equal gain transmission, and design a base station digital precoding matrix based on standard orthogonalization and singul...

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Abstract

The invention belongs to the technical field of wireless communication and discloses a standard-orthogonalization-based hybrid pre-coding method for a large-scale MIMO system. Analog pre-coding design is based on equal-gain transmission. The phase of a main diagonal element of a baseband equivalent channel matrix is set to zero to obtain the maximum antenna array gain so as to reduce the total energy consumption and complexity of a transmitter. The design of a digital pre-coding matrix is based on standard orthogonalization and singular value decomposition. By mapping a desired user to other user null space, the interference between users is completely eliminated and the maximum spectral efficiency is obtained. A numerical result shows that the performance of the hybrid pre-coding method, when equipped with a small number of radiofrequency links, approaches that of an all-digital pre-coding solution that requires the same number of radiofrequency links as the antennas, and can obtain high spectral efficiency with low implementation complexity.

Description

Technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a standard orthogonalization-based hybrid precoding method for a massive MIMO system. Background technique [0002] Massive MIMO (Massive MIMO) system can deeply explore spatial freedom by configuring a large-scale antenna array for the base station, so that it can use the same time-frequency resource to serve multiple users. It is regarded as the fifth generation of mobile communication. (5G) One of the most important physical layer key technologies. For Massive MIMO systems, precoding design is particularly important due to energy consumption and system cost constraints. In traditional MIMO systems, due to the small number of antennas, the configuration of the same number of radio frequency (RF) links as the antennas will not bring high implementation complexity, energy consumption and cost. Therefore, all-digital technology is usually used to pair signal...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456
CPCH04B7/0456
Inventor 庞立华张阳胡健飞朱代先代新冠
Owner 广州市埃特斯通讯设备有限公司
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