Double dimension joint SDMA method based on statistical information in 3D MIMO system

A 3DMIMO and 1.3DMIMO technology, applied in the transmission system, radio transmission system, diversity/multi-antenna system, etc., can solve the problems of system complexity and feedback increase, real-time feedback increase, and low flexibility

Active Publication Date: 2015-01-14
XIDIAN UNIV
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Problems solved by technology

3D MIMO technology requires the use of active antenna arrays in the base station, which dramatically increases the complexity and feedback of the system
The flexibility of this method is not high, and it cannot make full use of the spatial freedom of the base station’s large-scale antennas. Moreover,

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  • Double dimension joint SDMA method based on statistical information in 3D MIMO system
  • Double dimension joint SDMA method based on statistical information in 3D MIMO system
  • Double dimension joint SDMA method based on statistical information in 3D MIMO system

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[0090] Technical principle:

[0091] According to the physical characteristics of the channel, due to the different spatial positions of different users in the horizontal and vertical directions, the statistical information of the correlation matrix of the transmitter also has a large difference, and the change is relatively slow, and only long-term feedback is required. Using the information of the correlation matrix of the transmitting end, in the virtual angle domain, each user corresponds to different directions in the vertical and horizontal directions, so that more accurate separation between users can be achieved in the spatial domain. Based on this idea, the present invention realizes user clustering according to statistical characteristics, and groups users in the same cluster according to different characteristic directions among users, and allocates different time-frequency resource blocks to different groups of users, so as to realize spatial division multiple acces...

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Abstract

The invention discloses a double dimension joint SDMA method based on statistical information in a 3D MIMO system. The method includes the following steps of (1) channel estimation and correlation matrix calculation, (2) clustering base matrix configuring, (3) user clustering, (4) user characteristic direction selection, (5) user grouping and (6) downlink data sending. The double dimension joint SDMA method has the advantages that clustering bases designed through the double dimension joint SDMA method can jointly achieve horizontal user clustering and grouping and vertical user clustering and grouping, and the registration precision of users by a base station is greatly improved; by means of the method, only the sending end correlation matrixes corresponding to the users need to be fed back in a long term, and the channel state information does not need to be fed back quantitatively in real time, so that the load of an up link can be greatly relieved; the clustering and grouping method is adopted, the airspace freedom degree provided by multiple antennas of the base station can be utilized flexibly and efficiently, and thus the number of the users is increased; the method is simple in operation step and convenient to actually apply.

Description

technical field [0001] The invention relates to a dual-dimensional joint SDMA method, in particular to a dual-dimensional joint SDMA method based on statistical information in a 3D MIMO system, and belongs to the technical field of wireless communication. Background technique [0002] In order to meet the ever-improving service quality requirements of future users, the research work of the fifth-generation mobile communication technology is committed to achieving the goal of "10,000 times in ten years". 3D MIMO technology is expected to become a key technology to greatly improve system performance. Different from the traditional communication system that only considers the channel information in the horizontal dimension, the 3D MIMO system can realize the utilization of the degree of freedom in the vertical dimension of the channel, thereby further improving the average capacity of the system and the user capacity of edge cells. 3D MIMO technology requires the use of active...

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Application Information

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IPC IPC(8): H04B7/04H04B7/06
CPCH04B7/0417H04B7/0452
Inventor 李勇朝井文文刘灿王伟马克张海林
Owner XIDIAN UNIV
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