Radar Signal Cross-Correlation for Target Detection
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Solution Overview
Problem
Current radar systems are inefficient due to the need for multiple testing of a reflected signal, as the position and velocity of a potential target are initially unknown, leading to uncertainty in distinguishing target signals from interference.
Innovation Solution
The use of a plurality of pulses to make decisions about the presence or absence of a target, where the position and velocity of the target are carried over from pulse burst to pulse burst, resulting in a consistent radar signal structure and high cross-correlation for efficient signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single burst of pulses is used to make a decision on target presence, then the system complexity is reduced, but the detection reliability deteriorates due to inability to distinguish target signals from interference
Solution Approach 1:
The patent applies preliminary action by using multiple pulses to estimate the interference covariance matrix before making the target detection decision. This preliminary estimation of interference characteristics allows the system to distinguish target signals from interference more reliably, resolving the contradiction between detection reliability and system complexity.
2Measurement precision
If multiple pulses are used to carry over position and velocity information, then the detection precision is improved, but the processing time increases
Solution Approach 1:
The patent applies continuity of useful action by carrying over position and velocity information from one pulse burst to the next, maintaining continuous tracking of target characteristics. This allows the system to improve detection precision through accumulated information while reducing processing time by avoiding redundant calculations in each pulse burst.
3Measurement precision
If the position and velocity of target are initially unknown, then the system is more versatile, but the detection precision deteriorates due to multiple testing requirements
Solution Approach 1:
The patent applies feedback by using the detected position and velocity information from one pulse burst to refine the search and detection in subsequent pulse bursts. This feedback mechanism allows the system to maintain versatility for unknown targets while improving detection precision and processing efficiency through iterative refinement of target parameters.
Data Source
AI summary
The present invention relates to radar systems and methods of using same that are more efficient than current radar systems and methods of using same. Such radar systems and methods of using same using employs a plurality of pluses is used to make a decision on the presence or absence of a target. Such radar system and method of using same is more efficient as the position and velocity of a potential target is carried over from pulse burst to pulse burst. Thus, the radar signal structure from the target is the same, which in turn results in a high cross correlation that can used to efficiently decide if signal return is from an actual target or is due to interference.