Matched Co-Sensor Fusion Filtering for Atomic Sensor Noise Rejection
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Solution Overview
Problem
Existing atomic quantum sensors experience downtime and are affected by high-frequency environmental noise due to pulsed measurements and non-optimal sensor fusion with co-sensors, leading to reduced precision and increased hardware complexity.
Innovation Solution
A measurement device incorporating an atomic sensor, a non-atomic co-sensor, and a non-causal filter that generates a filtered output to mitigate noise, using a matched filter to compensate for the co-sensor's frequency-dependent response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor fusion with a co-sensor is used to mitigate downtime effects, then measurement continuity is improved, but high-frequency environmental noise is not optimally rejected due to unaccounted spectral response differences
Solution Approach 1:
The patent applies parameter changes by modifying the filter design to account for the spectral response characteristics of both the atomic sensor and co-sensor. Specifically, the filter transfer function is designed based on the transfer functions of both sensors, optimizing the frequency-dependent parameters to achieve optimal noise rejection while maintaining measurement precision.
Solution Approach 2:
The patent uses the co-sensor to create a model or copy of the environmental noise affecting the atomic sensor. By filtering the co-sensor output to match the spectral response of the atomic sensor, the system creates an accurate representation of the noise that can then be subtracted from the atomic sensor measurements, effectively canceling the harmful high-frequency noise.
2Measurement precision
If multiple interleaved atomic sensors are used to mitigate downtime, then measurement continuity is improved, but hardware complexity and risk of failure increase
Solution Approach 1:
The patent introduces a co-sensor as an intermediary device that bridges the gap between atomic sensor measurements. Instead of using multiple atomic sensors, the co-sensor continuously measures the environmental conditions and provides data that can be used to interpolate or correct the atomic sensor readings during downtime, achieving measurement continuity with a single atomic sensor.
Solution Approach 2:
The patent replaces the mechanical approach of using multiple physical atomic sensors with a signal processing approach. By using a co-sensor and appropriate filtering algorithms, the system achieves the same effect as multiple atomic sensors without the associated hardware complexity, replacing redundant physical components with computational methods.
3Ease of manufacture
If a simple co-sensor fusion approach is used, then implementation is simpler, but noise rejection is suboptimal due to ignoring frequency-dependent response differences
Solution Approach 1:
The patent optimizes the filter parameters based on the specific transfer functions of the atomic sensor and co-sensor. By designing the filter transfer function to account for the frequency-dependent spectral responses of both sensors, the system achieves optimal noise rejection performance tailored to the specific sensor combination being used.
Data Source
AI summary
A matched filter in a measurement device that includes an atomic sensor with a co-sensor is described. In one embodiment, the matched filter is a non-causal filter. Embodiments herein also describe a method for producing a matched filter by determining a filter transfer function from the transfer functions of the atomic sensor and the co-sensor. The method can be used to produce a matched filter that is non-causal but can also generate a causal filter for time sensitive applications.