Multi-transmission Antenna User Selection for Adjacent Cell Interference
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Solution Overview
Problem
Existing multi-user multi-transmission/reception antenna systems in wireless communication face performance deterioration due to interference signals from adjacent cells, particularly in multi-cell environments, with insufficient research on uplink systems considering these interferences.
Innovation Solution
A multi-transmission/reception antenna system that estimates channel information and correlation matrices of noise and interference signals from adjacent cells, calculates transfer rates for user groups, and determines optimal user groups to minimize interference impact, thereby improving performance by efficiently selecting users and allocating subchannels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-user multi-transmission/reception antenna system is implemented to increase transfer rates, then productivity is improved, but interference signals from adjacent cells deteriorate system performance
Solution Approach 1:
The patent converts the harmful interference signals from adjacent cells into useful information by estimating the interference correlation matrix. This matrix is then used in the user selection process to identify users whose channel characteristics are orthogonal to the interference directions, thereby transforming the interference problem into a selection criterion that improves system performance in multi-cell environments
Solution Approach 2:
The patent changes the user selection parameter from traditional metrics to one that incorporates interference correlation information. By using the interference correlation matrix to evaluate user channel responses, the system selects users based on their compatibility with the interference environment, thereby adapting the selection criteria to the actual multi-cell conditions and improving overall system performance
2Device complexity
If user selection is performed without considering interference signals to simplify the process, then device complexity is reduced, but system performance deteriorates in multi-cell environments
Solution Approach 1:
The patent performs preliminary estimation of the interference correlation matrix before the user selection process. This pre-computed interference information is then integrated into the user selection criterion, allowing the system to make informed decisions without requiring complex real-time interference cancellation or mitigation during the selection phase itself
3Reliability
If interference cancellation techniques are applied to remove interference signals, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential interference correlation information from the complex interference environment and uses this condensed representation for user selection. Instead of implementing full interference cancellation which would require complex signal processing, the system extracts the correlation characteristics and uses them as a selection criterion, thereby achieving interference mitigation with reduced complexity
Data Source
AI summary
The invention relates to a multi-transmission/reception antenna device and a multi-transmission/reception method in a multi-user and multi-cell environment. When a plurality of spatial subchannels having a multi-user and a multi-transmission/reception antenna are allocated to users (that is, user terminals), a user group to be supported and the number of users are selected in consideration of an influence of interference signals from adjacent cells. Accordingly, variability and independence of channels for users and interference signals from adjacent cells can be effectively used, thereby improving a transfer rate of a wireless communication system. The invention allows data transfer at higher speed with limited wireless resources. In particular, an influence of interference from adjacent cells that is inevitable in a multi-cell environment primarily used for the efficient use of wireless resources can be removed using a multi-transmission/reception antenna, while a transfer rate of each user can be effectively increased.