Shared Antenna Radar Signal Probe for Interference Mitigation
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Solution Overview
Problem
The interference between millimeter wave frequency transceiver modules in communication devices and automotive radar systems poses a safety risk, as the second harmonic signals from communication devices can saturate automotive radar receivers, potentially leading to unawareness of approaching vehicles by pedestrians engaged in data or voice communications.
Innovation Solution
A combined cellular transceiver and automotive radar sensor module with a measurement receiver configured to probe and amplify automotive radar signals, allowing for the measurement of signal strength and harmonic signals, which can initiate alerts or optimize transmitter settings to reduce interference and enhance user safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mm wave frequency transceiver module operates at 39 GHz in a communication device, then high data rate communication experience is provided, but second harmonic signals interfere with and saturate the automotive radar receiver operating at 77 GHz
Solution Approach 1:
The measurement receiver continuously monitors radar signal strength before the radar transmitter actually transmits, enabling the communication device to detect the presence of radar signals in advance and adjust its transmission accordingly to avoid interference
Solution Approach 2:
The system implements a feedback mechanism where the measurement receiver provides real-time information about radar signal strength to the communication device, which then adjusts its transmission power or timing based on this feedback to prevent harmful interference
2Reliability
If the measurement receiver continuously monitors radar signal strength, then user safety is enhanced through proximity alerts, but energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the measurement receiver performs periodic measurements of radar signal strength at intervals, which reduces energy consumption while still providing timely detection of approaching vehicles for safety alerts
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 solution effectively reduces interference with automotive radar signals and enhances user safety by providing proximity alerts and optimizing communication settings, thereby improving safety for users in shared spaces with vehicles.
Implementation Method 1
The signal probe is configured to probe an automotive radar signal sent from one or more automobiles
Implementation Method 2
The measurement receiver further comprises an amplifier coupled to the signal probe and configured to receive and amplify the radar signal output from the signal probe
Data Source
AI summary
A combined cellular transceiver and automotive radar sensor module (100) comprising a cellular transceiver (110) and an automotive radar sensor (120) is disclosed. The cellular transceiver (110) comprises a receiver (111) and a transmitter (112) configured to operate at millimeter wave frequency. the automotive radar sensor (120) comprises a measurement receiver (130). The measurement receiver (130) comprises a signal probe (131) coupled to an antenna element (113) comprised in the cellular transceiver (110). an amplifier (132) coupled to the signal probe (131) and a power sensor (133) coupled to an output of the amplifier (132) and configured to receive an amplified radar signal from the amplifier (132) and measure the signal strength of the automotive radar signal.