Radar Self-Interference Cancellation Tuned by Antenna Position
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Solution Overview
Problem
Existing radar systems with rotating dish antennas face challenges in effectively removing clutter reflections due to changing antenna angles, as previous clutter removal approaches rely on static clutter assumptions.
Innovation Solution
A radar system with a self-interference cancellation component and a tuning component that adjusts tuning parameters based on the antenna's position, using look-up tables to configure Digital and RF Self-Interference Cancellation components for each antenna angle, thereby minimizing self-interference and clutter effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating dish antenna is used to scan an area, then the radar can detect objects in different directions, but the clutter reflections change as a function of antenna angle making previous clutter removal approaches ineffective
Solution Approach 1:
The patent implements dynamic tuning parameters that change as a function of antenna angle. The system adjusts the tuning parameters of the self-interference cancellation component based on the current antenna position, allowing the clutter removal to adapt to the changing clutter environment as the antenna rotates, thereby maintaining effectiveness across all scan directions
Solution Approach 2:
The system uses feedback from antenna position information to dynamically adjust the tuning parameters. The antenna position is monitored and used to select appropriate tuning parameters from a set of pre-determined parameters, creating a closed-loop system that maintains optimal clutter removal performance throughout the scanning cycle
2Device complexity
If static clutter removal approaches are used, then the system is simpler to implement, but they cannot effectively remove clutter when the antenna rotates and clutter changes with angle
Solution Approach 1:
The patent transitions from static to dynamic clutter removal by implementing tuning parameters that vary with antenna angle. This dynamic approach maintains clutter removal effectiveness throughout the antenna rotation while adding only minimal complexity through the use of pre-determined parameter sets and position-based selection
Solution Approach 2:
The system changes the tuning parameters of the self-interference cancellation component based on antenna position. By adjusting parameters such as filter coefficients and cancellation depths according to the current angle, the system adapts to varying clutter conditions without requiring a completely different clutter removal architecture
Data Source
AI summary
A radar system comprising: a transmit path; a receive path; an antenna coupled to the transmit path and the receive path; a self-interference cancellation component coupled between the transmit path and the receive path; and a tuning component coupled to the self-interference cancellation component. The tuning component configured to: obtain information identifying a first position of the antenna; determine a tuning parameter based on the information identifying the first position; and transmit the tuning parameter to the self-interference cancellation component. The self-interference cancellation component configured to: apply self-interference cancellation to a first signal received via the receive path based on: the tuning parameter; and a second signal transmitted via the transmit path.