Millimeter wave large-scale MIMO channel propagation characteristic measurement method and device

A technology of propagation characteristics and measurement methods, applied in transmission monitoring, transmission systems, radio transmission systems, etc., can solve problems such as insufficient azimuth domain characteristics of MIMO channel models, and achieve simple and easy measurement methods, efficient collection, and accurate collection Effect

Inactive Publication Date: 2019-01-11
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that most of the massive MIMO channel models are in the low frequency band and the azimuth angle domain characteristics are insufficient, the present invention develops a method for measuring the characteristics of millimeter-wave massive MIMO multi-user channels by designing a large-scale antenna array control platform of the base station, that is, a numerical control platform system And devices, to obtain real channel data in the pitch angle domain, and further provide the basis for the mmWave massive MIMO channel model

Method used

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  • Millimeter wave large-scale MIMO channel propagation characteristic measurement method and device
  • Millimeter wave large-scale MIMO channel propagation characteristic measurement method and device
  • Millimeter wave large-scale MIMO channel propagation characteristic measurement method and device

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Embodiment 1

[0034] The system diagram of the millimeter-wave massive MIMO multi-user channel measurement method designed by the present invention is as follows figure 1 As shown, the system includes a vector network analyzer (VNA), a base station transmitter virtual antenna array, a receiving antenna, and a numerical control platform system. The black frame represents the antenna bracket.

[0035] The vector network analyzer is KeySight N5235B, with a frequency range of 10MHz to 50GHz, which is mainly used to sweep and record S parameters in the entire measurement frequency band.

[0036] In this embodiment, as an optional manner, the control terminal of this embodiment can control the numerical control pan-tilt system by writing a certain program.

[0037]As another alternative, the CNC platform system includes two vertical stepping motors 1 and a horizontal stepping motor 2, conveyor belt 7, control board 5, guide rod 11, screw 12 and power supply 6; antenna bracket 4 is installed on t...

Embodiment 2

[0042] The measuring method designed by the present invention is as image 3 As shown, the specific implementation is as follows:

[0043] 1. Set the measurement frequency, IF bandwidth, transmit power, frequency resolution, and frequency sweep points for the VNA;

[0044] 2. Use electronic calibration devices to complete the calibration of vector network analyzers, cables and adapters;

[0045] 3. Fix the transmitting antenna on the antenna bracket, fix the receiving antenna on the tripod bracket, and connect to port 1 and port 2 of the appropriate network analyzer respectively;

[0046] It can be understood that step 1 can be followed by step 2 or step 3, such as image 3 shown in;

[0047] 4. Start the CNC platform system, control the terminal to input the initial position (X, Y) of the measurement, and the end position; the step size of the antenna array element and the size of the antenna array, initialize and wait for the transmitting antenna to move to the initial po...

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Abstract

The present invention belongs to the technical field of 5G mobile communications, relates to two key technologies of millimeter wave and large-scale MIMO, and especially relates to a millimeter wave large-scale MIMO channel propagation characteristic measurement method and device. The method comprises the steps of: fixing a transmitting antenna on an antenna support on a numerical control platform, and performing shifting with a half wavelength to form a virtual large-scale array at any shape; fixing a receiving antenna on an A frame to connect with a test device; employing an electronic calibration device to perform delay and power calibration of a vector network analyzer, a high-frequency feeder and an adapter; and starting and arranging a numerical control platform system to initializethe position of the transmitting antenna, the size of an array antenna and an array element spacing, controlling the position of the antenna array element by horizontal and vertical motors at the sametime, recording each array element position, and receiving S parameters of an antenna pair, wherein the collected actually measured data can be used for channel statistical property analysis and parameter estimation. The millimeter wave large-scale MIMO channel propagation characteristic measurement method and device can be used for channel test of antenna arrays with any sizes and shapes in themillimeter wave frequency band.

Description

technical field [0001] The invention belongs to the technical field of 5G mobile communication, and specifically relates to a method and a device for measuring propagation characteristics of a millimeter wave massive MIMO channel. Background technique [0002] Traditional massive MIMO (Multiple-input Multiple-output) technology uses the azimuth angle of the antenna, that is, vertical polarization or cross polarization, which is regarded as 2D MIMO. In order to further utilize MIMO technology, it is necessary to increase resources in the elevation domain, that is, use 3D MIMO to obtain multi-user signals, and distinguish multiple users in the elevation domain, thereby reducing multi-user interference and enhancing throughput. To meet the requirements of high transmission rate, high system capacity and low multi-user interference in 5G mobile communication systems, MIMO technology expands the antenna array to the 3-dimensional plane of elevation and azimuth by deploying dozens...

Claims

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Application Information

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IPC IPC(8): H04B7/0452H04B17/309H04B17/391
CPCH04B7/0452H04B17/309H04B17/391
Inventor 廖希邵羽王洋叶志红
Owner CHONGQING UNIV OF POSTS & TELECOMM
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