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A Multi-cell Cooperative 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, reduce feedback overhead, and improve system totality The effect of rate performance

Active Publication Date: 2021-05-07
SUNWAVE COMM
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  • Claims
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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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  • A Multi-cell Cooperative Precoding Method Based on Quantization and Statistical Channel Information
  • A Multi-cell Cooperative Precoding Method Based on Quantization and Statistical Channel Information
  • A Multi-cell Cooperative Precoding Method Based on Quantization and Statistical Channel Information

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a 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 precoding method based on quantization and statistical channel state information, the specific steps are as follows:

[0031] Step 1: The base station obtains all statistical channel information of the terminal in the cell, including the statistical channel information of the downlink from each coordinated base station to the terminal. For the convenience of representation, assume that there are K base stations, and each base station has Nt transmit antennas, and only one resource block is allocated to a single user at the same time in the cell, and th...

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Abstract

The present invention discloses a multi-cell cooperative precoding method based on quantization and statistical channel information, including: the base station obtains the statistical CSI of users in the cell, the users estimate their respective channel state information according to the received pilot channel, and the base station obtains the rough Instantaneous channel state information, the base station shares the instantaneous channel state information through the information sharing link, the base station obtains the statistical CSI and quantized instantaneous CSI of all users in the cell, and obtains a new precoding matrix W through linear combination. The base station uses the precoding matrix W Send data to the user. Beneficial effects of the present invention: Compared with the precoding algorithm based on single statistical channel information, due to the addition of instantaneous channel state information using low-order quantization, the direction of the precoding vector obtained based on statistical channel information can be adjusted to a certain extent Calibration, so that better performance can be obtained; this method can effectively improve the overall rate performance of the system and improve the system throughput.

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 wireless communication systems are limited, which cannot meet the increasing rate requirements. Studies have shown that the future mobile communication system must have a very high utilization rate of spectrum resources. For this reason, the Multiple-Input Multiple-Output (MIMO) technology has been introduced. The Multiple-Input Multiple-Output (MIMO) technology can open up space domain Resources can effectively utilize spatial multiplexing and diversity gain, and double the wireless channel capacity and spectr...

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Application Information

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Patent Type & Authority Patents(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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