Smart Antenna Signal Processing for Interference Suppression
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Solution Overview
Problem
In radio communication systems, efficient utilization of limited radio resources is hindered by interference, particularly in mobile communication systems where multiple antenna elements are used, as existing methods fail to effectively direct signals and suppress interference.
Innovation Solution
A method involving transmitter- and receiver-side processing using a plurality of antenna elements, where signals are transmitted as a linear combination of antenna directional diagrams, allowing for specific direction transmission and interference suppression by converting signal sequences between baseband and high-frequency processing sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antenna elements are used to transmit signals, then signal coverage and capacity are improved, but interference between signals increases
Solution Approach 1:
The patent applies local quality by creating spatially selective signal transmission through antenna beamforming. Each antenna element transmits signals with specific directional characteristics, allowing the system to provide different signal qualities to different spatial locations. The baseband processing section calculates weighted combinations of signals for each antenna element based on desired transmission directions, enabling localized signal optimization while suppressing interference in other directions.
Solution Approach 2:
The patent segments the signal transmission process into distinct functional sections: baseband processing, high-frequency processing, and antenna element transmission. The baseband processing section separately calculates signal weights for each antenna element and transmission direction, then the high-frequency processing section processes these segmented signals independently before transmission. This segmentation allows independent optimization of each signal path to minimize interference.
2Object-generated harmful factors
If antenna beam is deflected to reduce interference, then signal directionality is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating the optimal signal weights for each antenna element in the baseband processing section before transmission. The system determines the weighted combinations of signals that will achieve the desired beamforming patterns and interference suppression in advance. This preliminary calculation allows the high-frequency processing section to simply apply the pre-determined weights, reducing real-time processing complexity while maintaining effective interference suppression.
3Manufacturing precision
If signals are processed in baseband section with multiple antenna directional diagrams, then transmission precision is improved, but processing time increases
Solution Approach 1:
The patent applies partial action by processing only the necessary number of antenna directional diagrams required for the current transmission scenario in the baseband section. Rather than processing all possible directional diagrams, the system calculates weights only for the specific directions where signal transmission is needed. This selective processing maintains transmission precision for required directions while reducing unnecessary processing time for directions where no transmission is needed.
Data Source
AI summary
For transmitter-side processing of information it is decided in which direction of transmission signals for a receiver are to be transmitted, the direction of transmission being a linear combination of one of a number of antenna directional diagrams corresponding to a first plurality. In a baseband processing section (REC), a number of antenna directional diagram signal sequences (X(1),X(2)), corresponding to the first plurality is determined from a signal sequence (T), determined for the receiver by weighting of the signal sequence (T) for each of the antenna directional diagrams with a coefficient (a(1), a(2)) corresponding to each of the linear combinations. Each antenna directional diagram signal sequence (X(1),X(2)) is transmitted by a dedicated logical connection from the baseband processing section (REC) to a high frequency processing section (RE). A conversion of the first plurality of antenna directional diagram signal sequences (X(1),X(2)) to a number of antenna element analogue signals, corresponding to a second plurality different to the first plurality, is carried out in the frequency processing section (RE). Each antenna element analogue signal is transmitted from one antenna element (A) of a number of antenna elements (A) corresponding to the second plurality.