Radar Signal Crossing Rate Analysis for Interference Rejection
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Solution Overview
Problem
Radar sensors operated at similar frequencies and close distances often interfere with each other, leading to false detection of target motion, which complicates accurate motion detection and increases power consumption.
Innovation Solution
An apparatus with interface and processing circuitry that determines the rate at which a radar sensor's measurement signal crosses a predefined value, distinguishing between interference signals and target motion by analyzing the rate of crossings, thereby reducing false detections and enabling multiple radar sensors to operate effectively near each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple radar sensors are operated at similar frequencies and close distances, then the system can achieve higher detection coverage and responsiveness, but the radar signals interfere with each other causing false detection of target motion
Solution Approach 1:
The patent segments the detection task by analyzing different characteristics of the radar signal (rate of crossing predefined values) to distinguish between interference and actual target motion. This segmentation allows the system to handle multiple radar sensors independently while filtering out false detections through characteristic analysis.
Solution Approach 2:
The patent introduces an intermediary analysis mechanism that processes the radar signal by counting the rate at which it crosses predefined values. This intermediary step acts as a filter between the raw radar data and the final detection decision, enabling the system to differentiate between interference patterns and actual motion.
2Device complexity
If conventional radar detection methods are used, then the system is simple to implement, but it cannot distinguish between interference signals and actual target motion leading to false alarms
Solution Approach 1:
The patent changes the detection parameter from simple signal presence detection to analyzing the rate of crossing predefined values. This parameter transformation enables the system to maintain simplicity while improving precision, as the rate of crossing is a straightforward calculation that provides discriminative power between interference and motion.
3Speed
If radar sensors continuously monitor for target motion, then the system maintains high readiness and response capability, but power consumption increases
Solution Approach 1:
The patent employs periodic action by continuously monitoring the rate of crossing predefined values in the radar signal. This periodic analysis allows the system to maintain readiness without requiring continuous high-power processing, as the detection can be performed at regular intervals using simple counting operations that consume minimal energy.
Data Source
AI summary
An apparatus includes interface circuitry configured to receive data indicating a measurement signal of a radar sensor. The apparatus further includes processing circuitry configured to determine a rate at which the measurement signal crosses a predefined value based on the data and determine presence of at least one of an interference signal and a target motion in a field of view of the radar sensor based on the rate.