Radar Signal Processing Using Virtual Chirp Segmentation
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Solution Overview
Problem
Current radar systems require multiple acquisition periods to detect targets, leading to delayed reaction times and increased probabilities of missed or false detections.
Innovation Solution
The method involves dividing a single physical chirp into multiple virtual chirps, allowing for independent processing and enabling faster target recognition by treating a single acquisition as multiple separate acquisitions, thereby reducing reaction time and false detection probabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a single physical chirp is processed traditionally, then the processing is simple and straightforward, but the target detection time is delayed and reaction time is increased
Solution Approach 1:
The patent divides a single physical chirp signal into multiple virtual chirps by segmenting the sampling data into different groups. Each virtual chirp is then processed independently through FFT and CFAR operations, enabling parallel processing paths that reduce overall target detection time while maintaining manageable processing complexity for each individual virtual chirp.
2Reliability
If multiple acquisition periods are used to detect targets, then the detection reliability is improved, but the reaction time is increased and false detection probabilities rise
Solution Approach 1:
By segmenting a single acquisition into multiple virtual chirps that are processed in parallel, the system achieves detection reliability comparable to multiple sequential acquisitions without the time penalty. The parallel processing of virtual chirps provides multiple independent detection opportunities within a single acquisition period.
Solution Approach 2:
The patent performs preliminary segmentation of the chirp signal into virtual chirps before processing, preparing multiple processing paths in advance. This preliminary action enables faster execution during the detection phase, reducing reaction time while maintaining reliable detection through multiple parallel processing channels.
3Measurement precision
If the chirp period is increased to improve target recognition, then the detection accuracy is improved, but the reaction time is further delayed
Solution Approach 1:
The patent segments the sampling data from a single chirp period into multiple virtual chirps, effectively creating multiple detection opportunities within the same time frame. This segmentation allows the system to maintain the original chirp period for accuracy while achieving faster reaction times through parallel processing of the segmented virtual chirps.
Data Source
AI summary
A method for processing a radar signal is provided. The method may include receiving chirps of a radar signal, sampling the radar signal, dividing the samples that correspond to the chirp of the radar signal into at least two virtual chirps, and processing the radar signal based on the at least two virtual chirps. Also, a corresponding device is provided.