Asynchronous Interference Cancellation via Signal Rate Interpolation
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Solution Overview
Problem
Existing systems face challenges in canceling interference between signals with different bit rates, leading to degraded signal quality and detection accuracy in applications like magnetic recording and communication systems.
Innovation Solution
An apparatus and method that involve interpolating the interfering signal to match the bit rate of the signal of interest, generating an interference component signal, and using it to cancel out interference, resulting in a cleaned signal for improved detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference cancellation is performed between signals with different bit rates without interpolation, then device complexity is reduced, but signal quality and detection accuracy deteriorate
Solution Approach 1:
The patent applies preliminary action by interpolating the interfering signal before interference cancellation to match the bit rate of the signal of interest. This preprocessing step ensures that the signals are synchronized in rate before cancellation, improving signal quality while managing complexity through structured interpolation algorithms.
Solution Approach 2:
The patent uses an interpolator as an intermediary device that transforms the interfering signal from its original bit rate to match the signal of interest's bit rate. This intermediary processing enables effective interference cancellation by creating a compatible signal representation without requiring complex rate-matching mechanisms throughout the system.
2Measurement precision
If interpolation is applied to match bit rates before interference cancellation, then detection accuracy is improved, but processing time and computational load increase
Solution Approach 1:
The interpolation is performed as a preliminary action before interference cancellation, preparing the signals in advance at the required bit rate. This allows the main detection process to proceed efficiently with pre-synchronized signals, reducing overall processing time despite the additional interpolation step.
Solution Approach 2:
The patent changes the temporal parameter (bit rate) of the interfering signal through interpolation to match the signal of interest. By transforming the signal at a controlled rate, the system achieves accurate detection while managing computational load through efficient interpolation algorithms that balance precision and processing speed.
3Reliability
If asynchronous interference is canceled without rate matching, then device complexity is reduced, but interference cancellation effectiveness deteriorates
Solution Approach 1:
The interpolator serves as an intermediary that bridges the bit rate difference between asynchronous signals. By transforming the interfering signal to match the signal of interest's rate, the system achieves effective interference cancellation without requiring complex adaptive rate-matching mechanisms or multiple processing paths.
Solution Approach 2:
The patent changes the bit rate parameter of the interfering signal through interpolation to enable effective cancellation. This parameter transformation allows the system to handle asynchronous signals effectively by converting them to a common rate, improving cancellation effectiveness while maintaining manageable device complexity through a unified processing approach.
Data Source
AI summary
A system may include an interpolator circuit configured to receive a first signal with a first rate and to generate an interpolated signal with a second rate. The system may include a cancellation circuit configured to determine an interference component signal based on the interpolated signal. The system may further comprise an adder configured to receive a second signal with the second rate and to cancel interference in the second signal using the interference component signal to generate a cleaned signal.