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Method for suppressing common-channel interference

A technology of channel information and channel matrix, applied in the field of wireless communication network, can solve problems affecting system performance, poor communication quality of edge users, etc., and achieve the effect of improving spectrum efficiency and performance

Inactive Publication Date: 2013-09-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The technical problem solved by the present invention is: to provide a method for suppressing co-channel interference, which solves the problems in the prior art that lead to poor communication quality of edge users and affect the performance of the entire system

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  • Method for suppressing common-channel interference

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Embodiment 1

[0050] The present invention provides a method for suppressing co-channel interference. At the transmitting end, the serving base station and the adjacent base station share the channel information of each user through a backhaul link, and perform weighting factors and precoding for different channel conditions. Matrix design. The receiving end designs the receiving matrix by receiving the feedback from the transmitting end, so as to distinguish different data streams of the same user. Since the transceiver allocates less interference power to users with poor communication quality and more interference power to users with better communication quality, and can effectively distinguish different data streams of the same user at the receiving end, it can Effectively improve the communication quality of edge users.

[0051] Assuming that there are K cells, in this embodiment, each base station only allocates one user as an example, each user is configured with M antennas, and each...

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Abstract

The invention provides a method for suppressing common-channel interference. The method includes the steps that S1, channel information is obtained through downlink channel estimation and is transmitted to a service base station and an adjacent base station; S2, a transmitting end calculates weight factors according to the channel information, calculates a precoding matrix according to the weight factors and transmits precoding information to a receiving end; S3, the receiving end calculates a receiving matrix according to the precoding information. According to the method for suppressing the common-channel interference, due to the fact that the weight factors are added in the precoding design, edge users are protected, moreover, the design of transmitting-receiving combination is used for separating a plurality of data flows of a single user, while system capacity similar to that through a traditional algorithm is obtained, spectral efficiency of the edge users is greatly improved, and performance of a whole system is effectively promoted.

Description

technical field [0001] The invention relates to the technical field of wireless communication networks, in particular to a method for suppressing co-channel interference. Background technique [0002] In a downlink MU-MIMO system, each base station and each user can configure multiple antennas at the same time, and one base station can transmit multiple data streams to each user. When single-user MIMO has strong channel correlation, the spectral efficiency of the system will decrease sharply. Multi-user MIMO technology can transmit different data streams to different users at the same time and at the same frequency, while the correlation between different users is small. Therefore, the spectral efficiency of the MU-MIMO system is effectively improved. Because of this advantage, MU-MIMO technology is considered to be one of the key technologies of the next generation of mobile communication, and has received great attention from international standards such as 3GPP and IEEE8...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/06H04W16/14
Inventor 翟昶亮陈拽霞王帅崔高峰王卫东张英海
Owner BEIJING UNIV OF POSTS & TELECOMM