Phase-Based Search Procedure for FMCW Radar Interference Removal
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Solution Overview
Problem
Radar devices using FMCW technology face interference issues due to mutual coupling, which can lead to false target detection and increased processing resource consumption, as correlation-based searchers are prone to errors from timing jitter.
Innovation Solution
Implementing a phase-based search procedure that identifies the reflected FMCW radar signal without relying on a reference signal, thereby reducing error and improving robustness in distinguishing interference from targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If correlation-based search procedure is used to identify reflected FMCW radar signal, then target detection can be performed, but timing jitter causes errors and reduces measurement precision
Solution Approach 1:
The patent changes the measurement parameter from time-based correlation to phase-based detection. By measuring phase instead of time directly, the system avoids timing jitter errors while maintaining target detection capability. The phase information is extracted from the FMCW signal to identify targets without relying on precise timing measurements.
Solution Approach 2:
The patent replaces the mechanical/time-based correlation search mechanism with a phase-based detection mechanism. This substitution eliminates the sensitivity to timing jitter inherent in correlation-based methods while preserving the ability to detect and identify reflected radar signals from targets.
2Reliability
If correlation-based search procedure is used to identify reflected FMCW radar signal, then target detection can be performed, but interference from mutual coupling causes false target detection
Solution Approach 1:
The patent extracts and removes the interference component from the received signal before performing target detection. By separating the mutual coupling interference from the reflected FMCW signal, the system eliminates false target detection while maintaining accurate identification of real targets through phase-based analysis.
3Reliability
If correlation-based search procedure is used to handle interference, then signal processing can be performed, but processing resource consumption increases
Solution Approach 1:
The patent extracts interference components from the received signal and removes them before further processing. This approach reduces the computational burden by eliminating interference early in the processing chain, thereby improving processing efficiency while maintaining effective interference removal.
Solution Approach 2:
The patent performs interference removal as a preliminary action before target detection and signal analysis. By addressing interference first, the system reduces the complexity of subsequent processing steps and improves overall processing efficiency while maintaining reliable interference removal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The phase-based search procedure enhances the accuracy of interference removal and target detection, reducing unnecessary processing and communication resource consumption, leading to improved device performance.
Implementation Method 1
receiving a received signal comprising a reflected frequency modulated continuous wave (FMCW) radar signal
Data Source
AI summary
In some aspects, a radar device may receive a received signal comprising a reflected frequency modulated continuous wave (FMCW) radar signal and interference. The radar device may identify the reflected FMCW radar signal based at least in part on performing a phase based search procedure to facilitate removing the interference from the received signal. The radar device may perform an action based at least in part on a characteristic of the identified reflected FMCW radar signal. Numerous other aspects are described.