Adaptive Interference Filter Taps in Full-Duplex Transceivers
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Solution Overview
Problem
Full-duplex transceivers experience interference due to signal reflections at characteristic impedance discontinuities, which worsen with higher data rates and long transmission channels, necessitating energy-inefficient interference filtering.
Innovation Solution
A transceiver circuit with an interference filter comprising filter taps that dynamically activate or deactivate based on interference impact, using a tap control unit to manage filter coefficients and signals, reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference filtering is continuously applied to mitigate signal reflections, then signal quality is improved, but energy consumption increases
Solution Approach 1:
The filter tap activation is made dynamic rather than static. The tap control unit continuously monitors interference levels and adaptively activates or deactivates filter taps based on current conditions. This allows the system to maintain high signal quality when interference is present while consuming minimal energy when interference is absent, directly resolving the contradiction between continuous filtering and energy efficiency.
Solution Approach 2:
The system changes the operational parameter of filter taps from a fixed state to a variable state. Filter taps can switch between active and inactive modes based on interference thresholds. This parameter change enables the system to optimize the balance between signal quality maintenance and energy consumption by adjusting filter tap activation levels according to real-time interference conditions.
2Object-affected harmful factors
If all filter taps are continuously activated to handle interference, then interference mitigation is improved, but device complexity and power consumption increase
Solution Approach 1:
Instead of uniformly activating all filter taps across the entire system, the invention applies local quality by selectively activating only those specific filter taps that are currently needed based on local interference conditions. The tap control unit determines which individual taps should be active based on localized interference measurements, reducing overall system complexity while maintaining effective interference mitigation where required.
3Use of energy by moving object
If filter taps are selectively deactivated to reduce power consumption, then energy efficiency is improved, but interference mitigation capability may deteriorate
Solution Approach 1:
The system implements feedback through the tap control unit that continuously monitors interference levels and adjusts filter tap activation accordingly. When interference exceeds thresholds, the feedback mechanism activates the necessary filter taps to restore adequate interference mitigation capability. This closed-loop feedback ensures that energy efficiency is optimized without permanently compromising the system's ability to mitigate interference when needed.
Data Source
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AI summary
There is disclosed a transceiver circuit comprising: a receiver channel configured to receive a signal comprising a sequence of symbols comprising interference; an interference detection unit configured to determine a difference signal for each symbol; an interference filter comprising a plurality of filter taps each associated with a different interference symbol of an interference signal, wherein each filter tap comprises: 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 the filter signal generator is configured to output the filter signal for combination with the received symbol, and wherein each filter signal generator is configured to operate in one of: an activated mode; and a deactivated mode, and the transceiver circuit comprises a tap control unit configured to control whether each filter signal generator of the filter tap operates in the activated mode or the deactivated mode based on a comparison of the filter coefficient to a predetermined threshold value.