Adaptive Signal Receiver Thresholding for Noise Cancellation
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Solution Overview
Problem
Conventional signal receivers face challenges in maintaining optimal noise cancellation due to varying noise levels caused by temperature and environmental changes, leading to either insufficient noise removal or reduced reception sensitivity.
Innovation Solution
A signal receiver with adaptive noise cancellation capabilities, utilizing a control unit and reference voltage changing mechanism to dynamically adjust the voltage levels for noise cancellation based on real-time noise intensity, ensuring effective noise filtering without compromising signal extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a high voltage level is set for noise cancellation, then noise removal is improved, but reception sensitivity is lowered and performance deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of the reference voltage level based on actual noise intensity. The control unit continuously monitors the received signal and adjusts the reference voltage accordingly, transitioning from a static threshold approach to a dynamic one that adapts to changing noise conditions, thereby resolving the contradiction between noise cancellation and signal preservation
Solution Approach 2:
The patent changes the voltage level parameter of the reference signal based on measured noise intensity. By adjusting this critical parameter dynamically rather than keeping it fixed, the system optimizes the balance between removing noise and preserving weak transmission signals, directly addressing the technical contradiction
2Reliability
If a low voltage level is set for noise cancellation, then reception sensitivity is maintained, but noise is not cancelled sufficiently
Solution Approach 1:
The patent employs a feedback mechanism where the control unit monitors the received signal characteristics and adjusts the reference voltage level accordingly. This closed-loop control ensures that when noise intensity increases, the reference voltage is raised to maintain effective noise cancellation, while when noise is low, the voltage is reduced to preserve signal sensitivity
Solution Approach 2:
The system transitions from a static noise cancellation threshold to a dynamic one that responds to real-time noise conditions. This dynamic adaptation allows the system to maintain optimal performance across varying noise environments, preventing both over-cancellation and under-cancellation scenarios
3Device complexity
If a fixed voltage level is used for noise cancellation, then device complexity is reduced, but adaptability to varying noise levels is poor
Solution Approach 1:
The patent implements a self-adjusting noise cancellation system where the control unit automatically monitors noise intensity and adjusts the reference voltage without external intervention. This self-service mechanism maintains simplicity while achieving adaptability, as the system autonomously responds to changing conditions without requiring complex external control
Solution Approach 2:
The control unit serves multiple functions: it monitors the received signal, measures noise intensity, determines the appropriate reference voltage level, and adjusts the cancellation threshold. This multi-functionality achieves adaptability without proportionally increasing device complexity, as a single unit performs multiple critical tasks
Data Source
AI summary
A signal receiver adaptive to a noise level includes a first comparator, a second comparator, a control unit, and a reference voltage changing unit. The first comparator compares a voltage of a received signal with a first reference voltage, and the second comparator compares the voltage of the received signal with a second reference voltage. The control unit outputs a control voltage having a voltage level corresponding to the number of output pulses per unit time of the first comparator. The reference voltage changing unit changes the magnitudes of the first reference voltage and the second reference voltage in response to a voltage level of a control voltage. The second comparator compares the changed second reference voltage with the received signal to output a transmission signal from which noise is cancelled. A voltage level of noise to be cancelled from the received signal varies according to a noise level, so the noise cancellation adaptive to the noise level is performed.