Radar Interference Parameter Estimation Using Echo Signal Slope
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Solution Overview
Problem
Existing methods for estimating parameters of interfering signals in automotive radar systems are inefficient, requiring large sample sizes and consuming excessive time, making precise interference avoidance challenging.
Innovation Solution
A method that utilizes the slope of interfering signals to transmit and receive echo signals, allowing for the estimation of parameters such as bandwidth and periodicity, enabling precise interference avoidance through frequency and time domain adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large quantity of samples are collected to precisely estimate interfering signal parameters, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing reference signals corresponding to different interfering signal parameters (slope, bandwidth, periodicity) before actual interference occurs. When interference is detected, the system directly compares received signals with pre-prepared reference signals to rapidly identify parameters, eliminating the need for time-consuming real-time analysis while maintaining high precision
Solution Approach 2:
The patent implements dynamics by adaptively adjusting the sampling rate and analysis depth based on the detected interference characteristics. For strong periodic interference, the system focuses computational resources on periodicity analysis; for transient interference, it prioritizes slope and bandwidth estimation. This dynamic resource allocation maintains precision while minimizing time consumption
2Device complexity
If the radar transmission signal uses a fixed slope, then device complexity is reduced, but adaptability to interfering signals deteriorates
Solution Approach 1:
The patent implements dynamics by making the transmission signal slope adaptive rather than fixed. The system continuously monitors the interfering signal slope and dynamically adjusts the transmission signal parameters in real-time. This allows the radar to adapt to different interference scenarios (varying slopes, bandwidths, periodicities) while maintaining relatively simple signal generation architecture through parameter reconfiguration rather than structural complexity
Solution Approach 2:
The patent applies parameter changes by modifying key parameters of the transmission signal (slope, bandwidth, chirp duration) based on detected interfering signal characteristics. Instead of changing the fundamental signal structure, the system achieves adaptability by dynamically adjusting parameters such as setting the transmission signal slope equal to the interfering signal slope to maximize interference cancellation effectiveness
Data Source
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AI summary
This application provides a method for evaluating a parameter of an interfering signal and detection apparatuses (700, 800, and 900) to quickly and precisely estimate a parameter of an interfering signal, so as to perform interference avoidance. The method includes: determining a slope of an interfering signal; using the slope of the interfering signal as a slope of a first transmission signal; and determining a parameter of the interfering signal based on a feature of an echo signal of the first transmission signal. Because interference duration of same slope interference is long and stable, parameters such as a periodicity and a bandwidth of the interfering signal can be determined more precisely. Further, interference avoidance can be better performed.