Chirp Envelope Regulation for Radar Interference Mitigation
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Solution Overview
Problem
Current frequency-modulated continuous-wave radar systems face challenges in effectively mitigating interference, leading to inefficient power consumption and high false detection rates, particularly in self-driving vehicles equipped with multiple sensors.
Innovation Solution
A transceiver system that regulates the magnitude of chirp signal envelopes in a predetermined pattern, using a modulation circuit to modulate the transmitted signal, thereby reducing interference and improving power efficiency by suppressing non-linear regions of chirped radar signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If envelope regulation is applied to mitigate interference, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the envelope magnitude of chirp signals through regulation. The modulation circuit changes the amplitude parameter of transmitted signals in a predetermined pattern, transforming the signal characteristics to enable interference mitigation while maintaining system functionality
Solution Approach 2:
The modulation circuit serves as an intermediary component between the signal generator and transmitter. It mediates the signal transmission process by applying envelope regulation, acting as a buffer that processes signals to reduce interference before transmission without requiring fundamental system redesign
2Object-affected harmful factors
If chirp signal envelopes are regulated, then radar-to-radar interference is reduced, but power consumption increases
Solution Approach 1:
The patent implements periodic action through predetermined envelope patterns that modulate chirp signals in repeating cycles. By regulating envelopes periodically with specific patterns, the system reduces radar-to-radar interference through time-varying amplitude modulation while managing power consumption through structured signal transmission
Solution Approach 2:
The modulation circuit applies partial action by regulating only specific portions of the chirp envelopes rather than continuously modulating the entire signal. This selective envelope regulation targets interference-prone regions while maintaining signal integrity in other areas, reducing overall power consumption
Data Source
AI summary
A radar system that can block false echoes includes: a local oscillator configured to generate a chirp signal comprising a plurality of chirps, each having a corresponding envelope; a transmitter configured to transmit a signal corresponding to the chirp signal; and a modulation circuit configured to modulate the transmitted signal by regulating a magnitude of one or more portions of the chirp envelopes in a predetermined pattern such that the radar system can discern false echoes which do not match the pattern.