Communication Device Interference Cancellation and Suppression
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Solution Overview
Problem
Wireless communication devices at the edge of radio cells face interference from neighboring cells, limiting data throughput due to signal interference from adjacent base stations, which existing interference suppression and cancellation techniques do not adequately address.
Innovation Solution
A communication device that combines interference cancellation and suppression techniques by reconstructing and subtracting interfering signals, and equalizing received signals using channel information, with a processor selecting the best method based on signal quality to enhance data reconstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If interference cancellation is used to reconstruct and subtract interfering signals, then interference removal effectiveness improves, but computational complexity increases
Solution Approach 1:
The system dynamically switches between interference cancellation and interference suppression methods based on real-time signal conditions. The processor determines which method is more effective for the current scenario, making the interference removal system adaptive rather than static, thereby optimizing the balance between effectiveness and complexity.
Solution Approach 2:
The system changes the processing parameter by selecting different interference removal methods (cancellation vs. suppression) based on channel conditions and signal characteristics. This parameter switching allows the system to adapt to varying interference scenarios without committing to a single complex approach.
2Device complexity
If interference suppression is used to equalize received signals, then computational complexity is reduced, but interference removal effectiveness decreases
Solution Approach 1:
The system employs dynamic method selection where the processor evaluates current signal conditions and switches between suppression and cancellation approaches. This ensures that the simpler suppression method is used when adequate, while upgrading to cancellation only when necessary for effective interference removal.
Solution Approach 2:
The system applies interference suppression as a baseline partial action that handles moderate interference cases efficiently. When interference exceeds certain thresholds or specific patterns are detected, the system escalates to full interference cancellation, applying exactly the right level of processing complexity for each situation.
3Productivity
If dynamic selection between interference methods is implemented, then data throughput improves in interference-limited scenarios, but device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where the processor continuously monitors signal quality and interference levels, then adjusts the interference removal method accordingly. This feedback loop enables automatic optimization of data throughput by selecting the most effective method for current conditions without requiring manual intervention or overly complex fixed architectures.
Solution Approach 2:
The communication device is designed with multi-functionality, incorporating both interference cancellation and suppression capabilities within a single system. This universal design allows the device to handle diverse interference scenarios using the appropriate function, improving overall throughput while managing complexity through shared processing resources.
Data Source
AI summary
A communication device is provided comprising a frontend component configured to receive a signal being a combination of an information signal and an interference signal; a first interference removal component configured to reconstruct the interference signal and to subtract the reconstructed interference signal from the received signal to generate a first processed received signal; a second interference removal component configured to equalize the received signal based on channel information of a channel between the device and a sender of the information signal and channel information of a channel between the device and a sender of the interference signal to generate a second processed received signal; and a processor configured to reproduce information contained in the information signal based on the one of the processed received signals or a combination of the processed received signals based a comparison of the first processed received signal and the second processed received signal.