Distributed Antenna Sub-Array Allocation for Spatial Multiplexing
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Solution Overview
Problem
In distributed antenna systems using sub-array configurations, the high spatial correlation between antennas leads to decreased communication capacity during SU-MIMO operations.
Innovation Solution
The base station allocates sub-arrays from different antennas to candidate terminal stations for spatial multiplexing transmission, reducing spatial correlation and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If antenna allocation is performed according to reception power standards in a distributed antenna system using sub-array configuration, then reception power efficiency is improved, but spatial correlation between base station and terminal station becomes very high causing communication capacity to decrease
Solution Approach 1:
The patent segments the antenna system into multiple sub-arrays distributed across different physical locations. By allocating sub-arrays from different antennas to different terminal stations, the system maintains reception power efficiency while reducing spatial correlation through physical separation of transmitting elements.
Solution Approach 2:
The patent applies different allocation strategies to different sub-arrays based on their local positions and characteristics. Each sub-array is allocated considering its specific spatial location and reception properties, allowing optimization of both reception power efficiency and spatial correlation reduction locally across the distributed antenna system.
Data Source
AI summary
A wireless communication method in a distributed antenna system including a base station and a plurality of antennas that communicates with one or more terminal stations by spatial multiplexing according to control of the base station, in which each of the plurality of antennas includes a plurality of sub-arrays, the base station allocates a plurality of sub-arrays of different antennas to each of one or more candidate terminal stations to be subjected to communication by spatial multiplexing using two or more sub-arrays among the plurality of sub-arrays, and the plurality of sub-arrays allocated to the candidate terminal station performs spatial multiplexing transmission to the allocated candidate terminal station.