Receive Sequence TOA Detection Using Correlation Interval Points
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Solution Overview
Problem
Existing methods for determining the time of arrival (TOA) of a receive sequence in digital transmission systems are inflexible, inaccurate, and prone to errors due to multipath propagation and noise, leading to potential synchronization failures and data transmission issues.
Innovation Solution
A device and method that determine the TOA based on a point within an interval around the main maximum of the correlation sequence, rather than the main maximum itself, using a correlator and processor to identify a reversal point or extreme value, which is less sensitive to multipath propagation and noise, and may involve interpolation for accurate timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the time of arrival is determined based on the main maximum of the correlation sequence, then the method is simple to implement, but the accuracy deteriorates due to sensitivity to multipath propagation and noise
Solution Approach 1:
The patent applies local quality by shifting from using the global maximum (main maximum) to using a local point within an interval adjacent to the main maximum. This local point is selected based on specific criteria (such as being a reversal point or having maximum gradient) and is less sensitive to multipath effects and noise, thereby improving measurement precision while maintaining implementation simplicity.
2Ease of operation
If a fixed threshold value is used to detect correlation magnitude maximum, then the detection rule is simple, but the adaptability deteriorates in changing transmission channels
Solution Approach 1:
The patent applies dynamics by replacing the fixed threshold detection method with a dynamic selection process. Instead of using a static threshold, the system dynamically identifies points within an interval adjacent to the main maximum based on local characteristics (such as reversal points or maximum gradient points). This dynamic approach allows the system to adapt to changing transmission channel conditions while maintaining operational simplicity.
Data Source
AI summary
A device for determining a time of arrival of a receive sequence in a receiver includes a correlation for determining a correlation value sequence from a correlation of the receive sequence with a transmit sequence, wherein the correlation sequence includes a peak shape having a main maximum and at least one local side maximum. The device further includes a processor to determine a point of the correlation sequence which lies within an interval which is on the one side bounded by the local side maximum and on the other side by the peak shape, and which is implemented to determine the time of arrival depending on the point.