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Multi-cell collaborative precoding method based on quantization and statistical channel information

A technology for statistical channel information and multi-cell cooperation, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as increased construction costs, improve system throughput, improve overall system rate performance, and reduce The effect of the number of feedback bits

Active Publication Date: 2018-01-12
SUNWAVE COMM
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Problems solved by technology

However, in order to achieve cooperation, the base stations need to share channel state information and / or data information. As the number of cooperative base stations increases and the data rate increases, huge requirements are placed on the bandwidth of the shared link between base stations, resulting in construction costs. intensification of

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  • Multi-cell collaborative precoding method based on quantization and statistical channel information
  • Multi-cell collaborative precoding method based on quantization and statistical channel information
  • Multi-cell collaborative precoding method based on quantization and statistical channel information

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Embodiment Construction

[0028] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] figure 1 Schematic diagram of a cellular network composed of multiple cells, combined with figure 2 , image 3 Be explained.

[0030] Such as image 3 As shown, the specific steps of the precoding method based on quantization and statistical channel state information are as follows:

[0031] Step 1: The base station obtains all statistical channel information of the terminals in the cell, including the statistical channel information of the downlink from each coordinated base station to the terminal. For ease of presentation, suppose there are K base stations, each base station has Nt transmitting antennas, only one resource block is allocated to a single user at the same time in a cell, and the user has only one receiving antenna. The b...

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Abstract

The invention discloses a multi-cell collaborative precoding method based on quantization and statistical channel information, the method comprises that a base station acquires the statistical CSI ofusers in a cell, the users estimate their respective channel state information according to the received pilot channel, and the base station obtains rough instantaneous channel state information, andthe base stations share the instantaneous channel state information through an information sharing link, the base station obtains the statistical CSI of all users in the cell and the quantized instantaneous CSI, and then a new precoding matrix W is obtained through linear combination and the data is sent to the users by means of a precoding matrix W. The method has the advantages that compared with a pre-coding algorithm based on single statistical channel information, due to the fact that the low-order quantized instantaneous channel state information is added, and the direction of the pre-coding vector obtained based on the statistical channel information can be calibrated to a certain degree, so that better performance can be obtained, the system total rate performance can be effectively improved, and the system throughput is improved.

Description

Technical field [0001] The invention belongs to the field of mobile communication and relates to a multi-cell cooperative precoding method based on quantization and statistical channel information. Background technique [0002] With the rapid development of wireless communication technology and mobile Internet, people continue to put forward higher requirements for mobile communication speed. However, system resources such as available spectrum and transmit power in a wireless communication system are limited, and cannot meet the increasing rate requirements. Studies have shown that the future mobile communication system must have extremely high spectrum resource utilization. For this reason, the Multiple-Input Multiple-Output (MIMO) technology is introduced. The Multiple-Input Multiple-Output (MIMO) technology can open up the spatial domain. Resources can effectively use spatial multiplexing and diversity gain. Without increasing the system bandwidth and antenna transmit power,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/0417H04B7/024H04B7/06
Inventor 潘鹏严军荣姚英彪
Owner SUNWAVE COMM
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