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Irregular splicing sub-array framework for large-scale MIMO beam forming

An irregular and large-scale technology, applied in radio transmission systems, advanced technologies, electrical components, etc., can solve the problems of MIMO transmission rate effect is not obvious, difficult, without consideration of transmission rate, signal-to-noise ratio, etc.

Inactive Publication Date: 2021-01-05
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

However, due to the non-uniform arrangement of the array elements, it is difficult to predict the influence of the mutual coupling between the array elements, and it is difficult to design the antenna array, which ultimately leads to the insignificant effect of the MIMO transmission rate.
Patent No. CN108808266A proposes an irregular splicing method for array arrangement, which can achieve high gain characteristics of the antenna, but its optimization algorithm mainly optimizes the sidelobe and gain index of the antenna, and does not consider the transmission at the system level Speed, signal-to-noise ratio and other indicators

Method used

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  • Irregular splicing sub-array framework for large-scale MIMO beam forming
  • Irregular splicing sub-array framework for large-scale MIMO beam forming
  • Irregular splicing sub-array framework for large-scale MIMO beam forming

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Embodiment Construction

[0047] Consider a point-to-point communication system, the base station is configured with an area array composed of 64 antenna elements, Send 32 independent data streams, and the user side is equipped with an area array composed of 64 antenna elements. Since it takes a long time to divide the irregular sub-arrays while considering the transmission and reception, this calculation example only considers the irregular sub-array division of the base station transmitter array, and the traditional regular array is still used for the user end array. The final design of the array arrangement diagram is Figure 4 As shown, its spectral efficiency is Figure 5 As shown, it can be seen that although its spectral efficiency is lower than that of the traditional MIMO array with 64 transmitting units and 64 receiving units, the spectral efficiency of the traditional MIMO array that also uses 32 transmitting units and 64 receiving units is significantly greater than the traditional solut...

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Abstract

The invention discloses an MIMO communication system based on an irregular spliced sub-array architecture, which can be used for full-digital beam forming and hybrid digital beam forming. Each radio frequency link is connected with two adjacent antenna units through one power divider, so that the number of the radio frequency links can be greatly reduced. In the design process, firstly, irregularsub-array arrangement is optimized by taking MIMO channel capacity as an optimization target, and after an optimal array topological structure is obtained, precoding and decoding vectors are designedby taking spectral efficiency maximization as a target. The most innovation of the invention lies in that under the condition that the number of the radio frequency links is not changed, the irregularsubarray architecture improves the MIMO channel capacity by increasing the aperture area of the antenna array, and finally, the spectral efficiency is improved.

Description

technical field [0001] The invention belongs to the field of wireless communication, relates to an optimization method for irregular sub-array arrangement, and proposes a low-cost MIMO communication architecture for all-digital beamforming and digital-analog hybrid beamforming, in the case of greatly reducing radio frequency links , realizing the high channel capacity and high signal-to-noise ratio characteristics of the MIMO system. Background technique [0002] Massive MIMO systems can achieve high transmission rates and high signal-to-noise ratios, and have been widely used in the fifth-generation mobile communication systems. At the same time, the high-precision analog-to-digital / digital-to-analog converter (ADC / DAC) in the radio frequency link consumes a lot of power in the millimeter wave band. At present, when the diversity gain is approaching the limit, increasing the channel gain of MIMO has become a main means to improve the transmission rate of the communication ...

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0426H04B7/0456
CPCH04B7/0413H04B7/043H04B7/0456Y02D30/70
Inventor 杨仕文马彦锴陈益凯屈世伟胡俊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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