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A joint precoding and antenna selection method for mimo systems based on smooth approximation

A technology of joint precoding and antenna selection, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve the problem of high computational complexity of traversal search, and achieve good system signal-to-noise ratio and fast antenna selection.

Active Publication Date: 2020-06-16
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a joint precoding and antenna selection method for MIMO systems based on the idea of ​​smooth approximation. High problem, which can guarantee fast antenna selection while obtaining good system signal-to-noise ratio

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  • A joint precoding and antenna selection method for mimo systems based on smooth approximation
  • A joint precoding and antenna selection method for mimo systems based on smooth approximation
  • A joint precoding and antenna selection method for mimo systems based on smooth approximation

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Embodiment Construction

[0023] In order to make the object and effect of the present invention clearer, the specific implementation manner of the method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, consider a multiple-input multiple-output (MIMO) system in which signals are transmitted from a base station (BS) with N transmit antennas to a mobile terminal with M receive antennas, assuming any channel between transmit and receive antennas is flat fading, then the M×N baseband channel complex matrix is ​​written as

[0025] G=[g 1 g 2 …g M ] H (1)

[0026] in is a complex row vector containing channel coefficients between N transmit antennas and the mth receive antenna, m=1, 2, . . . , M. The receiver has information of the channel matrix G.

[0027] Based on the feedback from the receiver, the transmitter selects K (out of N) transmit antennas and precodes using the total power constraint, and ...

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Abstract

The invention discloses an MIMO system joint precoding and antenna selection method based on a smooth approximation idea. The method comprises a step of obtaining parameters of a multiple-input multiple-output (MIMO) system, and establishing a mathematical model of an MIMO system antenna selection problem, a step of using the smooth approximation (SA) idea to convert the MIMO system antenna selection problem as a smooth problem, carrying out iterative solution of the problem, and completing antenna selection, and a step of carrying out optimal precoding design of a selected MIMO subsystem. According to the method, the smooth approximation idea is used to design the MIMO system joint precoding and antenna selection, and quick antenna selection can be achieved under the condition of obtaining a good system signal-to-noise ratio.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a joint precoding and antenna selection method for MIMO systems based on smooth approximation ideas. Background technique [0002] In recent years, people's demand for wireless communication has been increasing day by day, and the existing wireless system has gradually been unable to meet the demand, and the research on the next generation wireless system (5G) is becoming more and more urgent. As one of the key technologies of next-generation wireless communication systems, the research on massive multiple-input multiple-output systems (massive MIMO) has attracted more and more researchers. The increase in the number of massive MIMO antennas will increase the number of radio frequency links, which greatly increases the system cost and complexity. An effective solution to this problem is antenna selection. This technology effectively reduces the system cost and comp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/061
Inventor 王维维赵明杰史清江徐伟强吴呈瑜
Owner ZHEJIANG SCI-TECH UNIV