Split-Path Signal Cancellation Filter for Adaptive Frequency Notches
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing signal processing systems face challenges in creating filters with desired frequency characteristics, as achieving specific filter types can be difficult, expensive, or require additional components.
Innovation Solution
The implementation of a selective spectrum self-canceler filter, which uses a splitter, delay modules, phase shifters, and controllable amplifiers to adjust and align signal components, allowing for radical adjustments in frequency response by controlling VGAs and circuit components, enabling the creation of filters with asymmetrical frequency responses that can effectively cancel or suppress specific frequency components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional filter designs are used to achieve desired frequency characteristics, then filter performance can be improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the parameters of existing filter components (gain, delay, phase shift) to achieve desired frequency characteristics. By adjusting the gain of the second signal, the delay amount, and the phase shift, the filter can be configured for different frequency responses without changing the fundamental filter structure, thus avoiding increased device complexity while achieving precise frequency control.
Solution Approach 2:
The patent creates a universal filter structure that can perform multiple filter functions (low-pass, high-pass, band-pass, notch filters) by configuring the same basic components with different parameters. The second signal path with adjustable gain, delay, and phase shift can be programmed to create different frequency responses, making the filter multi-functional without requiring separate dedicated circuits for each filter type.
2Manufacturing precision
If additional components are added to achieve specific filter types, then filter performance improves, but ease of manufacture deteriorates
Solution Approach 1:
The patent implements a universal filter structure where a single circuit design can be configured to create different filter types (low-pass, high-pass, band-pass, notch) by programming the gain, delay, and phase shift parameters rather than assembling different physical components. This approach improves ease of manufacture while maintaining the ability to achieve specific filter types through parameter configuration.
3Device complexity
If fixed filter designs are used, then device complexity is reduced, but adaptability to changing signal environments deteriorates
Solution Approach 1:
The patent implements a dynamic filter where the gain, delay, and phase shift parameters can be adjusted in real-time based on the signal environment. The filter transitions from a static design to a dynamic one where parameters are programmed adaptively, allowing the same physical structure to respond to changing signal conditions without increasing physical complexity.
Solution Approach 2:
The patent enables adaptability by allowing parameter changes (gain, delay, phase shift) in the filter configuration. These parameters can be programmed to match different signal environments, enabling the filter to adapt its frequency response dynamically while maintaining a consistent physical structure.
Data Source
AI summary
A signal filter and accompanying methods. In one embodiment, the filter includes a first mechanism for receiving a first signal. A second mechanism employs one or more modified representations of the first signal to cancel one or more frequency components of the first signal, yielding an output signal in response thereto. In a more specific embodiment, the first mechanism includes a splitter for receiving the first signal and splitting the first signal onto a first path and a second path. The second mechanism further includes one or more delay modules and one or more phase shifters in the first path and/or the second path. One or more controllable amplifiers are optionally included in the first path and/or the second path. The one or more delay modules, phase shifters, or amplifiers are responsive to one or more control signals from a controller. The controller is adapted to modify behavior of the second mechanism so that the filter is characterized by a desired frequency response.