Adaptive Echo Cancellation Circuit for Signal Reflection Mitigation

The patent implements dynamic gain adjustment where the gain regulator continuously adapts the gain of the filtered data signal based on real-time signal conditions. This dynamic control allows the echo cancellation circuitry to effectively handle signal reflections at higher speeds without requiring permanently complex circuit design, resolving the contradiction between throughput improvement and circuit complexity.

The controller receives the filtered data signal, processes it to generate controller output signals that feed back to control both the filter and gain regulator. This feedback mechanism enables the system to automatically adjust its parameters based on actual signal conditions, allowing high-speed operation with adaptive reflection mitigation rather than fixed complex circuitry.

The patent applies partial action by implementing a sparse FIR filter that selectively processes only the most significant signal components rather than performing exhaustive signal processing on all frequency components. The gain regulator then applies targeted gain adjustment only where needed. This partial processing approach maintains signal quality for reflection mitigation while avoiding the excessive power consumption that would result from comprehensive signal processing.

The system dynamically changes parameters including the gain value and filter coefficients based on signal conditions. By adjusting these parameters adaptively rather than maintaining fixed high-processing settings, the system achieves reliable signal reflection cancellation only when and where necessary, reducing overall power consumption while maintaining signal quality.

The patent segments the echo cancellation function into distinct modular components: a filter stage for signal decomposition, a gain regulator stage for amplitude adjustment, and a controller for coordination. This segmentation allows each component to be optimized independently with simpler circuitry than a monolithic echo canceller, reducing total die-area while maintaining cancellation effectiveness through the coordinated operation of the segmented stages.

The dynamic gain adjustment mechanism allows the system to achieve effective echo cancellation adaptively rather than requiring permanently complex circuitry. The gain regulator modifies signal characteristics in real-time based on feedback, enabling simpler base circuit design that achieves high cancellation effectiveness only when needed, thereby reducing overall die-area requirements.