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Antenna Selection Method Based on Massive MIMO System

An antenna selection and large-scale technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as high complexity, and achieve the effect of reducing complexity and retaining performance

Active Publication Date: 2018-06-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Both of the above two low-complexity suboptimal algorithms require iteration, and the channel capacity is continuously calculated during the iteration process. For a massive MIMO system with a large base of alternative antennas, the complexity is still very large

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  • Antenna Selection Method Based on Massive MIMO System
  • Antenna Selection Method Based on Massive MIMO System
  • Antenna Selection Method Based on Massive MIMO System

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] The system model applicable to the method of the present invention can be found in figure 1 . Consider the scenario of a downlink single-cell multi-user MIMO system: the base station is configured with N service antennas and Q radio frequency links, and serves M single-antenna users at the same frequency at the same time, where M≤Q≤N, such as figure 1 shown in . It is assumed that the base station can obtain complete channel state information from the base station to all serving users. Based on the complete channel state information and according to the criterion of maximizing the channel capacity, Q so-called optimal antennas are selected from the N serving antennas. The selected Q antennas are connected to the Q radio frequency links one by one through the switch.

[0028] first, Indicates the set of all candidate service antennas, excl...

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Abstract

The invention discloses an antenna selection method based on a massive MIMO system: 1) All users feed back complete channel state information to the base station; 2) Assuming that the power distribution of all selected antennas is uniform, calculate each candidate antenna According to the channel capacity, the antenna with the largest channel capacity is selected as the first selected antenna; 3) On the basis of selecting the first antenna, according to the correlation properties of the matrix space, continue to select the most efficient use of airspace resources Sufficient antennas until the required number of antennas is reached. The method considers the full use of the space degree of freedom, and has the characteristics of low complexity, easy implementation and good performance of the system.

Description

technical field [0001] The invention relates to a wireless communication massive multiple-input multiple-output (Massive MIMO) system, in particular to an antenna selection method based on the massive MIMO system. Background technique [0002] Massive MIMO technology can significantly improve system performance. However, in an actual system, due to consideration of actual physical limitations and the complexity of implementing the system, the number of serving antennas at the base station cannot be arbitrarily increased to infinity. In addition, the cost of system implementation should also be considered. Adding more serving antennas to a base station is usually very cheap, and adding additional digital signal processing units is getting cheaper too. However, devices in the radio frequency (Radio Frequency, RF) link module, such as: RF low-noise amplifier, digital frequency up / down converter (Digital Frequency UpConverter, DUC / Digital Frequency Down Converter, DDC), analog...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
CPCH04B7/0608H04B7/061H04B7/0626
Inventor 任品毅赵兰奇杜清河孙黎
Owner XI AN JIAOTONG UNIV