Motion-Assisted Radar Leakage Removal
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Solution Overview
Problem
Current radar systems struggle to accurately separate leakage from target signals in environments where target shape, size, or location is unknown, or when the environment is constantly changing, especially at mmWave frequencies like 60 GHz, due to the proximity of transmitter and receiver antenna arrays.
Innovation Solution
An electronic device with a radar transceiver, sensor, and processor that determines motion states to transmit specific signals, generates channel impulse responses (CIR), and applies filters to estimate and remove leakage, allowing for accurate target detection and navigation in unfamiliar environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the transmitter and receiver antenna arrays are placed close to each other to meet device size constraints, then the device compactness is improved, but signal leakage from transmitter to receiver increases
Solution Approach 1:
The patent extracts and removes the harmful leakage signal from the received signal through signal processing techniques. The system separates the leakage component from the target echo signal and eliminates it, allowing the transmitter and receiver to be placed close together without compromising detection accuracy.
Solution Approach 2:
The patent introduces motion state information as an intermediary parameter to distinguish between leakage signals and target signals. By using motion state data from sensors, the system can identify and separate leakage components based on their different motion characteristics compared to actual targets.
2Measurement precision
If current leakage separation methods are used that assume target or leakage suppression, then leakage removal can be achieved in controlled environments, but the methods fail in situations where targets are completely unknown or environment is constantly changing
Solution Approach 1:
The patent makes the leakage removal system dynamic by using real-time motion state information. Instead of relying on static assumptions about target or leakage characteristics, the system continuously adapts to changing environments by incorporating sensor data about device motion, making it effective in unknown and dynamic conditions.
Solution Approach 2:
The patent incorporates feedback from motion sensors to continuously update the leakage estimation and removal process. The system uses real-time motion state information to adjust its signal processing, creating a closed-loop system that adapts to changing environmental conditions and maintains accuracy in unknown environments.
Data Source
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AI summary
A method and electronic device for motion assisted leakage removal. The electronic device includes a radar transceiver, a sensor, and a processor. The processor is configured to determine, based on information obtained from the sensor, that the electronic device is in a first motion state, during the first motion state of the electronic device, control the radar transceiver to transmit a first set of signals, generate a first channel impulse response (CIR) based on the received first set of signals being received, apply a filter that estimates a leakage depicted by the first CIR, in a second motion state, control the radar transceiver to transmit a second set of signals, generate a second CIR based on the received second set of signals, and apply the estimated leakage from the first CIR to the second CIR to remove leakage from the second CIR.