Digital Signal Quantization Error Reduction via Sensor Merging
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Solution Overview
Problem
Existing digital signal processing methods for sensors introduce quantization errors during digitization, particularly in measuring kinematic properties of objects, which are not effectively reduced without increasing processing resources and complexity.
Innovation Solution
Combining digital signals from multiple sensors to reduce quantization error rates, either by switching between or averaging the signals from sensors measuring different kinematic properties, such as velocity and position, to minimize error introduction during digitization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bit resolution is increased to reduce quantization error, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple digital signals from sensors measuring different kinematic properties (position, velocity, acceleration) through addition or averaging. This merging of signals reduces the quantization error rate without requiring higher bit resolution, thereby avoiding increased device complexity and cost while improving measurement precision
2Measurement precision
If companding algorithms are implemented to reduce quantization error, then measurement precision is improved, but processing resources are consumed
Solution Approach 1:
The patent combines multiple digital signals through simple addition or averaging operations, which require minimal processing resources compared to companding algorithms. This approach reduces quantization error rate while consuming fewer processing resources, maintaining productivity while improving measurement precision
3Measurement precision
If multiple sensors are combined to reduce quantization error, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple digital signals through simple addition or averaging operations, which are computationally straightforward and do not significantly increase signal processing complexity. This approach reduces quantization error rate while maintaining manageable device complexity
Solution Approach 2:
The patent changes the parameter being measured by combining signals from sensors measuring different kinematic properties (position, velocity, acceleration). This parameter transformation allows reduction of quantization error rate without requiring complex processing of each individual signal
Data Source
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AI summary
A method for reducing an error rate is provided. The method includes obtaining a first analog signal representing a first kinematic property of a first position with a sensor, obtaining a second analog signal representing a second kinematic property of the first position, digitizing the first analog signal into a first digital signal, and digitizing the second analog signal into a second digital signal. The method also includes combining the first digital signal and the second digital signal into a combined signal such that an error rate of the combined signal is less than an error rate of one of the first digital signal and the second digital signal.