Radar Transmit Power Shaping via Window Splitting
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Solution Overview
Problem
Radar systems face challenges in designing high-performance systems that limit power requirements while maintaining signal quality, as high transmit power levels increase hardware complexity and susceptibility to noise or interference.
Innovation Solution
The techniques involve splitting the second window applied during signal processing into two parts, with one part applied at the transmitter to modify the power envelope of radar chirps and the other part retained at the signal processor, thereby reducing transmit power without degrading signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high transmit power levels are used, then signal quality is improved, but hardware complexity and power consumption increase
Solution Approach 1:
The patent applies parameter changes by modifying the power envelope of transmitted chirps according to a predetermined power profile that varies transmit power across different time intervals. This allows the system to achieve improved signal quality in focused intervals without maintaining high power continuously, thereby reducing overall hardware complexity and power consumption requirements while still achieving the necessary signal quality for accurate target detection.
Solution Approach 2:
The patent implements periodic action by using a predetermined power profile that applies different power levels during different time intervals (focused intervals versus non-focused intervals). This periodic modulation of transmit power allows the system to concentrate energy when needed for signal quality while reducing power during other intervals, effectively resolving the contradiction between maintaining high signal quality and reducing overall power consumption and hardware complexity.
2Measurement precision
If high transmit power levels are used, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent changes the power parameter dynamically by applying a predetermined power profile that modulates transmit power across different time intervals. This allows the system to achieve high signal quality during focused intervals when detection is most critical, while reducing power consumption during non-focused intervals, thereby resolving the contradiction between maintaining signal quality and reducing overall power consumption.
Solution Approach 2:
The patent employs periodic action through the use of a power profile that periodically applies high power during focused intervals and reduces power during other intervals. This periodic modulation ensures that high signal quality is achieved only when necessary for target detection, while minimizing power consumption during intervals when detection sensitivity is less critical, thus resolving the contradiction between signal quality and power consumption.
3Use of energy by moving object
If transmit power is reduced, then power consumption decreases, but signal quality degrades
Solution Approach 1:
The patent applies parameter changes by implementing a predetermined power profile that strategically varies transmit power across different time intervals. This allows the system to reduce overall power consumption while maintaining signal quality during focused intervals where detection accuracy is most critical. The selective application of power levels resolves the contradiction by ensuring high signal quality is achieved only when necessary rather than continuously.
Solution Approach 2:
The patent uses periodic action through the power profile that alternates between high power during focused intervals and reduced power during non-focused intervals. This periodic modulation ensures that signal quality is maintained during critical detection intervals while reducing power consumption during less critical intervals, effectively resolving the contradiction between reducing power consumption and maintaining signal quality.
Data Source
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AI summary
A radar device includes a radar front end and a radar processor. The radar front end includes transmit signal generation circuitry to generate a radar transmit signal sequence including a plurality of radar transmit signals and a power shaping component configured to receive the plurality of radar transmit signals and output the plurality of radar transmit signals with a plurality of different power levels. The radar front end includes a transmitter to transmit the plurality of radar transmit signals based on the plurality of different power levels, where the plurality of different power levels is based on a power profile associated with a window applied to digitized samples of reflections of the transmitted plurality of radar transmit signals. The radar processor is configured to apply the window across a slow-time of the digitized samples of the reflections prior to velocity processing.