Radio Node Beam Suppression for MIMO Throughput
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication networks face limitations in increasing the throughput of MIMO channels due to the dominance of strong Line-of-Sight paths, which can lead to poor layer orthogonality and reduced spatial multiplexing efficiency, especially in scenarios where alternative paths are not adequately utilized.
Innovation Solution
A method is introduced where a radio node suppresses the strongest beam when its signal strength is significantly higher than that of alternative beams, allowing the channel rank to increase by redistributing power to other paths, thereby enhancing MIMO channel conditions and throughput without the need for additional probing or complex hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the strongest beam is transmitted with high gain, then the signal strength is maximized, but the layer orthogonality deteriorates and spatial multiplexing efficiency is reduced
Solution Approach 1:
Instead of transmitting the strongest beam with maximum gain as conventionally done, the patent inverts the approach by intentionally suppressing the strongest beam and redistributing its power to other beams. This inversion resolves the contradiction by sacrificing signal strength in the dominant direction to improve layer orthogonality and spatial multiplexing performance.
Solution Approach 2:
The patent changes the beam gain parameter dynamically based on channel conditions. When the strongest beam is identified, its gain is reduced (suppressed) while other beams are boosted to compensate. This parameter change allows the system to trade off signal strength for improved spatial multiplexing, resolving the contradiction between strength and orthogonality.
2Reliability
If beamforming is applied to maximize signal strength, then transmission reliability is improved, but throughput is limited due to poor spatial multiplexing
Solution Approach 1:
The patent inverts the conventional beamforming approach by suppressing the strongest beam rather than maximizing it. This allows the system to maintain transmission reliability through alternative paths while enabling better spatial multiplexing, thereby improving throughput despite reduced signal strength in the dominant direction.
Solution Approach 2:
The patent dynamically adjusts beam gain parameters based on channel characteristics. By identifying and suppressing the strongest beam while redistributing power to other beams, the system optimizes the balance between transmission reliability and throughput, resolving the contradiction between these two performance metrics.
3Reliability
If additional probing or complex hardware is used to optimize MIMO channels, then channel conditions improve, but device complexity increases
Solution Approach 1:
The patent enables the system to optimize its own MIMO channel conditions using existing hardware and standard processing capabilities. By implementing beam suppression and power redistribution algorithms, the system self-optimizes channel performance without requiring additional probing equipment or complex hardware modifications, thus improving channel conditions while avoiding increased device complexity.
Data Source
AI summary
A method performed by a radio node for increasing a throughput of a MIMO channel. The radio node operates in a wireless communication network 100. The beams are beamformed at a transmitter of the radio node. The beams comprise: A first beam comprising a first beam gain in a first direction, and at least one second beam wherein each at least one second beam comprises a respective second beam gain in a respective second direction. When decided that the signal strength on the first beam is a first threshold stronger than the signal strength on each respective at least one second beam, and the signal strength on the at least one second beam is above a second threshold, the radio node increasing the throughput of the MIMO channel by suppressing (302) the first beam with respect to its beam gain.