Antenna Array Sub-Array Configuration for MIMO Spectral Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-frequency LOS scenarios, small antenna arrays in wireless communication systems struggle to support multi-stream transmission required by MIMO technology due to limited performance improvement from increasing the number of transceiving units or antennas, leading to hardware cost and complexity issues, and limited spectral efficiency.
Innovation Solution
A receiving device and transmitting device that determine the intensity of the LOS channel component and adjust the antenna array configuration based on position and attitude information to optimize beamforming and channel state estimation, allowing for flexible configuration of sub-arrays and beam shaping to enhance spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of transceiving units or antennas is increased to improve spectral efficiency, then multi-stream transmission capability is enhanced, but hardware cost and complexity increase
Solution Approach 1:
The antenna array is divided into multiple sub-arrays, where each sub-array can be independently configured and controlled. This segmentation allows the system to achieve multi-stream transmission capabilities through spatial division without requiring a proportional increase in the total number of antennas, thereby improving spectral efficiency while controlling hardware complexity.
Solution Approach 2:
The patent implements dynamic configuration of antenna array parameters including element spacing, sub-array grouping, and beamforming weights based on channel conditions. This dynamic adaptation enables the system to optimize spectral efficiency for different scenarios without requiring fixed hardware expansion, thus avoiding increased complexity.
2Productivity
If the antenna array size is increased to support multi-stream transmission, then MIMO performance is improved, but the condition number of channels increases and transmit power limitations are reached
Solution Approach 1:
Different sub-arrays within the antenna array are configured with different local parameters such as element spacing and beamforming characteristics. This local differentiation allows each sub-array to optimize for specific spatial directions or channel conditions, improving overall MIMO performance while maintaining favorable channel condition numbers through localized adaptation rather than uniform array expansion.
3Device complexity
If a small antenna array is used in high-frequency LOS scenarios, then hardware cost is reduced, but only one stream of signals can be transmitted
Solution Approach 1:
The patent exploits the spatial dimension by dividing the antenna array into multiple sub-arrays with different spatial configurations. This dimensional approach enables the small antenna array to support multiple independent signal streams through spatial multiplexing, achieving multi-stream transmission capability without increasing the total hardware count, thus resolving the contradiction between array size and stream capacity.
Data Source
AI summary
Provided in the embodiments of the present disclosure are a receiving device and a transmitting device. The receiving device according to the embodiments of the present disclosure includes: a control unit, configured to determine information on intensity of a light-of-sight (LOS) channel component in a communication channel; and a sending unit, configured to send the determined information to a transmitting device. The transmitting device according to the embodiments of the present disclosure includes: a transceiving unit, which includes a first antenna array; and a control unit, configured to obtain information about the intensity of a light-of-sight (LOS) channel component in a communication channel, and to determine a configuration mode of the first antenna array according to the information.