Reconfigurable Receiver Interference Management
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Solution Overview
Problem
Conventional receivers for wireless communication networks face high computational complexity and excessive signal processing due to the lack of interference consideration for each signal component, particularly exacerbated in modern scenarios with technologies like NAICS, which also result in significant signaling overhead.
Innovation Solution
A receiver is designed to be reconfigurable based on the interference level of each OFDM subcarrier/OFDM symbol, using multiple estimation units, channel estimation, and control units to adjust signal processing accordingly, minimizing complexity and maximizing performance by selectively using interference cancellation and suppression techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NAICS technology is applied for interference cancellation and suppression, then user performance is improved, but signal processing complexity and signaling overhead increase significantly
Solution Approach 1:
The receiver dynamically changes processing parameters (interference cancellation activation, estimation unit selection) based on measured interference levels of individual signal components. This allows the system to adapt its complexity to match the actual interference conditions, applying full NAICS processing only when necessary rather than always
Solution Approach 2:
The receiver employs a dynamic, reconfigurable architecture where the interference cancellation function can be selectively activated or deactivated based on real-time interference measurements. The system transitions between different operational states (with/without interference cancellation) depending on the interference level, making the complexity adaptive rather than static
2Measurement precision
If interference cancellation and suppression techniques are applied to all signal components, then detection accuracy is improved, but computational complexity increases excessively
Solution Approach 1:
The receiver applies interference cancellation selectively to specific signal components based on their individual interference levels rather than uniformly to all components. Each signal component is evaluated independently, and cancellation processing is applied only where needed, creating local optimization rather than global uniform processing
Solution Approach 2:
The system applies interference cancellation processing partially - only to the extent necessary based on measured interference levels. When interference is low, no cancellation is applied; when interference is high, full cancellation is applied. This partial action approach avoids the excessive complexity of always applying full cancellation processing
3Reliability
If multiple estimation units are used for signal component estimation, then detection performance is enhanced, but device complexity increases
Solution Approach 1:
The receiver employs a universal architecture where multiple estimation units serve multiple functions: they can operate independently for diverse signal components, work in parallel for different antenna signals, or be selectively activated based on interference conditions. This multi-functional design allows the same hardware structures to serve different purposes under different conditions
Solution Approach 2:
The receiver dynamically configures the operation of multiple estimation units based on real-time interference measurements. The system can activate or deactivate specific estimation units depending on the interference level of corresponding signal components, making the device complexity adaptive rather than fixed at the maximum level
Data Source
AI summary
A receiver adapted to receive a modulated signal including useful and interfering signals and to detect information bits carried thereon. The modulated signal comprises signal components each one associated with a respective modulation subcarrier and including respective useful and interfering signal components. The receiver may include a first estimation unit providing a respective first useful signal component estimate indicative of the useful signal component for each signal component; a second estimation unit providing a respective second useful signal component estimate indicative of the useful signal component for each signal component; a channel estimation unit estimating, for each signal component, a first channel frequency response associated with the respective useful signal component and a second channel frequency response associated with the respective interfering signal component; and a control unit determining, for each signal component, an interference level experienced by that signal component according to respective first and second channel frequency responses.