Multi-Sensor Sample Realignment Using Phase-Shift Interpolation
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Solution Overview
Problem
Multi-sensor systems face phase misalignment issues due to differences in phase control values between sampling periods, leading to degradation in digital receivers that rely on synchronized sampling phases.
Innovation Solution
A circuit and system that digitally interpolates samples based on phase control value differences to compensate for phase misalignment between sensors, using delay modules and timing control circuits to adjust sampling phases and align signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital interpolation is applied to compensate for phase misalignment, then signal processing accuracy is improved, but device complexity increases
Solution Approach 1:
A timing control circuit is introduced as an intermediary component that calculates phase differences between multiple sensors and generates control signals to adjust sampling phases. This mediator coordinates the interpolation process across delay modules, improving signal accuracy without requiring complex direct synchronization between all sensor pairs.
Solution Approach 2:
The system dynamically changes the sampling phase parameter based on calculated phase differences. By adjusting the phase control value for each sensor according to its relative timing offset, the system achieves accurate synchronization. This parameter-based approach is more efficient than complete signal reprocessing.
2Reliability
If phase alignment compensation is implemented across multiple sensors, then reliability of digital receiver is improved, but processing time increases
Solution Approach 1:
The system performs preliminary phase difference calculation and compensation before the main signal processing occurs. The timing control circuit pre-computes the phase offsets for all sensors based on their sampling timing differences, and applies these corrections in advance. This preliminary action ensures reliable synchronization without adding significant processing time during critical signal reception.
Solution Approach 2:
The patent replaces complex hardware-based phase synchronization mechanisms with digital signal processing and computational timing control. Instead of using precise mechanical or hardware timing circuits to synchronize sensors, the system uses software-based phase difference calculation and digital interpolation, achieving reliable synchronization more efficiently.
Data Source
AI summary
An apparatus may include a circuit configured to receive first and second samples of an underlying data from respective first and second sample periods and which correspond to respective first and second sensors, a phase control value may have first and second values during respective first and second sample periods. The phase control value may be a control value for a sample clock signal. The circuit may also determine a difference in the phase control value between the first value and the second value. The circuit may then digitally interpolate the first and second samples to produce a phase shifted first and second samples where the digital interpolation of at least one of the first and second samples mat be at least in part based on the difference in the phase control value to compensate for a phase misalignment between the first sample and the second sample.