User selection method in multi-community multi-user interference channel system

Abstract

The invention discloses a user selection method in a multi-community multi-user interference channel system in the technical field of communication. The user selection method in multi-community multi-user interference channel system includes: firstly, obtaining an interference channel matrix from other communities to the users in the community, and combing the interference channel matrix into an interference channel matrix of the users of the community; resolving quick response (QR) sorting the interference channel matrix of the users of the community, and obtaining a corresponding upper triangular matrix and postprocessing matrix; using the upper triangular matrix to obtain a user channel mass matrix; obtaining optimal users through the user channel mass matrix; finally, obtaining a postprocessing matrix through the interference channel matrix corresponding to the optimal users. The user selection method in the multi-community multi-user interference channel system is capable of ensuring that the users can select the system, lowering calculating complexity of channel quality information of each user, increasing handling capacity of the system, obviously improving the residual interference after user selection, and improving feasibility of the method in practical application.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a user selection method in a multi-cell multi-user interference channel system. Background technique [0002] The pursuit of higher transmission rate and higher spectral efficiency is a long-standing topic in the field of wireless communication. Multiple-antenna technology (Multiple Input Multiple Output, MIMO) introduces additional spatial freedom for wireless communication by configuring multiple antennas at the transmitting end and receiving end, thereby greatly improving the spectrum utilization and throughput of the system. With the deepening of research, MIMO technology has been extended from point-to-point single-user system to point-to-multipoint multi-user MIMO system (Multi-User MIMO: MU-MIMO). The MIMO system can greatly improve system capacity and spectrum efficiency. In the evolution of the 3GPP LTE standard, MU-MIMO technology has been adopted as an alternat...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is: how to propose a low-complexity and high-performance user selection method in a multi-cell multi-user interference channel system to solve the defects of poor system performance of the OIAUS scheme and traditional user selection based on eigenvalue decomposition The problem of high program complexity

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