Radar Leakage Cancellation Using Antenna Pair Spatiotemporal Modeling
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Solution Overview
Problem
Current radar systems face challenges in accurately detecting and ranging targets at close ranges due to strong leakage signals, which interfere with the detection and distort the target response.
Innovation Solution
The method involves canceling leakage signals by exploiting the spatiotemporal relationship between transmitting and receiving antennas, using a processor to reconstruct and subtract leakage signals from radar measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the transmitter and receiver are installed closely together, then the radar system achieves compact structure and integration, but strong leakage signals are generated that interfere with target detection and range estimation
Solution Approach 1:
The patent extracts and separates the leakage signal from the received signal by identifying components that are present in the leakage path but absent in the target reflection path. By isolating these specific signal components and subtracting them, the system removes the harmful leakage interference while preserving the target detection capability.
Solution Approach 2:
The patent applies preliminary anti-action by pre-characterizing the leakage signal properties through calibration procedures and using this knowledge to predict and cancel leakage signals before they interfere with target detection. The system proactively compensates for leakage by applying correction factors derived from the known spatiotemporal relationship between transmit and receive antennas.
2Measurement precision
If close-range target detection is performed, then the radar system achieves high spatial resolution, but leakage signals mask the target response and compromise detection accuracy
Solution Approach 1:
The patent creates a copy of the leakage signal based on the characterized spatiotemporal relationship between antennas and subtracts this copy from the received signal. By generating an accurate model of the leakage path and using it to cancel the interference, the system enables clear detection of close-range targets that would otherwise be masked by strong leakage.
3Measurement precision
If range estimation is performed in the proximity range, then the radar system achieves extended operational capability, but leakage distorts the target response and reduces estimation accuracy
Solution Approach 1:
The patent implements feedback by using the known antenna characteristics and signal propagation model to continuously predict and correct for leakage effects in real-time processing. The system feeds back the characterized leakage behavior into the signal processing chain to dynamically compensate for distortion and maintain accurate range estimation.
Data Source
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AI summary
A method and electronic device for leakage cancelation. The electronic device includes a first antenna pair, a memory, and a processor. The first antenna pair includes a first transmitter antenna configured to transmit signals and a first receiver antenna configured to receive signals. The memory is configured to store data. The processor is configured to identify, from the data stored in the memory, a first leakage factor associated with at least the first antenna pair, control the first transmitter antenna to transmit a first signal, generate a first CIR based on receipt, by the first receiver antenna, of reflection of the first signal, determine leakage in the first CIR based on at least the identified first leakage factor, and cancel the determined leakage from the first CIR.