Digital Radar Power Control Under Interference and Jamming
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Solution Overview
Problem
High-resolution radar systems face challenges with high power consumption and cost due to the need for wide-bandwidth analog-to-digital conversion and multiple channels, especially in automotive safety and autonomous driving applications, where interference and jamming are prevalent.
Innovation Solution
Implementing a power saving scheme with adaptive power control modes, including normal, low power, and idle modes, using a medium access control (MAC) controller to manage transmit power based on measurement configurations and noise estimation, and employing blanking techniques to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wide-bandwidth analog-to-digital conversion and multiple channels are used for high-resolution radar, then measurement precision and imaging quality are improved, but power consumption and device cost increase
Solution Approach 1:
The patent implements dynamic power control that adjusts transmit power levels based on detected target characteristics and environmental conditions. The system transitions between different power states (normal, low power, idle) to match actual operational needs, avoiding continuous high-power operation while maintaining detection capability when required
Solution Approach 2:
The system employs periodic measurement gaps where transmission is temporarily suspended to perform noise and interference measurements. This periodic action allows the radar to adapt power settings based on environmental conditions while reducing average power consumption during non-measurement periods
2Reliability
If transmit power is increased to maintain performance in presence of interference and jamming, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously measures noise and interference levels during measurement gaps, then uses this information to dynamically adjust transmit power settings. This feedback loop ensures the radar maintains reliable performance under interference conditions while avoiding unnecessary high-power operation when interference is low
Solution Approach 2:
The system changes operational parameters (transmit power level, measurement gap frequency) based on detected environmental conditions. When interference and jamming are detected, the system adjusts power parameters to maintain reliability; when conditions are favorable, parameters are relaxed to reduce power consumption
Data Source
AI summary
The apparatus includes: a radar circuit including a set of transmit antennas and a set of receive antennas; and a controller operably connected to the radar circuit, including a MAC controller and a configuration circuit, the controller configured to: in response to reporting a device capability including a maximum power and a power back off, identify a measurement configuration including a measurement gap, a set of parameters, and a sub-band structure; identify, based on the measurement configuration, a power control configuration for the radar circuit; and identify, based on a measurement report corresponding to the power control configuration, a power control mode including at least one of a normal mode, a low power mode, or an idle mode, wherein the radar circuit is configured to transmit a first signal at a transmit power that is determined based on the measurement report and the power control mode.