Adaptive Transceiver Interference Filtering With Selective Tap Control
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Solution Overview
Problem
In full-duplex transceivers, signal reflections due to characteristic impedance discontinuities in the transmission channel cause interference on the received signal, which is exacerbated by higher data rates and longer channels, and existing interference filters lack dynamic adaptation to varying channel conditions.
Innovation Solution
A transceiver circuit with an interference filter comprising multiple filter taps that adaptively activate or deactivate based on interference impact, using a tap control unit to reduce power consumption by selectively applying filter coefficients and signal processing, which includes a difference signal generator and a filter coefficient calculator to mitigate signal interference, which includes a tap control unit to manage filter tap activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If interference filters continuously process all filter taps to reduce interference, then interference reduction performance is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic operation of filter taps by introducing a tap control unit that dynamically activates or deactivates individual filter taps based on real-time interference assessment. The system evaluates the absolute value of filter coefficients against a threshold and selectively activates only those taps with significant interference impact, transforming the static continuous processing into dynamic conditional processing that adapts to varying interference conditions.
Solution Approach 2:
The patent applies local quality by treating different filter taps differently based on their specific interference characteristics. Instead of uniformly processing all filter taps, the system individually assesses each tap's interference level and applies processing only where necessary. This localized approach ensures that power is consumed only for taps that actually contribute to interference reduction, while taps with negligible interference impact remain inactive.
2Reliability
If all filter taps are continuously activated to mitigate interference, then signal quality is improved, but device complexity increases
Solution Approach 1:
The system dynamically adjusts the operational state of filter taps based on real-time interference assessment. The tap control unit continuously monitors filter coefficients and threshold comparisons, activating or deactivating taps as conditions change. This dynamic adaptation simplifies processing during low-interference periods while maintaining high signal quality during high-interference conditions.
Solution Approach 2:
The patent segments the filter processing into independent, controllable tap units. Each filter tap operates as an independent module that can be individually activated or deactivated by the tap control unit. This segmentation allows the system to manage complexity by processing only the necessary subset of taps rather than forcing continuous processing of all taps, thereby reducing overall system complexity while maintaining signal quality.
3Measurement precision
If filter processing is applied to all symbols to reduce interference impact, then received signal accuracy is improved, but processing time increases
Solution Approach 1:
The patent applies partial action by processing only the necessary subset of filter taps rather than all taps for every symbol. The tap control unit determines which taps require processing based on interference threshold comparisons, and only those selected taps are activated for processing the current symbol. This partial processing approach maintains received symbol accuracy for taps with significant interference while reducing overall processing time by skipping taps with negligible interference impact.
4Adaptability or versatility
If filter coefficients are continuously updated for all filter taps, then interference adaptation is improved, but computational load increases
Solution Approach 1:
The system dynamically updates filter coefficients only for actively selected taps rather than continuously updating all taps. The tap control unit monitors interference conditions and activates coefficient updates only when taps exceed the interference threshold. This dynamic update strategy maintains interference adaptation for relevant taps while reducing computational load by avoiding unnecessary updates to inactive taps.
Solution Approach 2:
The patent applies local quality by individually managing coefficient updates for each filter tap based on its specific interference characteristics. Each tap's coefficient update is independently controlled by the tap control unit, which assesses whether that particular tap requires updating based on local interference conditions. This localized update approach ensures adaptation where needed while minimizing computational load by skipping updates for taps in low-interference conditions.
Data Source
AI summary
The present disclosure relates to a transceiver circuit including a receiver channel configured to receive a signal including a sequence of symbols, an interference detection unit configured to determine a difference signal for each symbol, an interference filter including filter taps each associated with a different interference symbol of an interference signal. Each filter tap includes a filter coefficient generator configured to generate a filter coefficient based on the difference signal and the interference symbol of the filter tap, and a filter signal generator configured to generate a filter signal based on the filter coefficient and the interference symbol and to output the filter signal for combination with the received symbol. Each filter signal generator is configured to operate in an activated mode or a deactivated mode, controllable by a tap control unit of the transceiver based on a comparison of the filter coefficient to a predetermined threshold value.