Multi-radar Coexistence via Slow Rate Interference Identification
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Solution Overview
Problem
As more radar detection systems are deployed, interference between overlapping radar waveforms becomes a significant issue, affecting the accuracy of target detection and increasing the signal-to-noise ratio in high interference environments.
Innovation Solution
The method involves transmitting radar waveforms in sets of transmission time intervals using a common set of radar transmission parameters, varying at least one parameter between sets of intervals to identify interfering signals based on observed changes in monitored parameters of received signals, allowing for the suppression of interfering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If radar transmission parameters are kept constant across transmission time intervals, then the complexity of signal processing is reduced, but interference from overlapping radar waveforms increases and target detection accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from static (constant) radar transmission parameters to dynamic (varying) parameters across transmission time intervals. The radar system dynamically adjusts transmission parameters such as frequency, chirp rate, or phase between different transmission intervals, enabling the system to adapt to changing interference conditions and improve target detection accuracy in multi-radar environments.
Solution Approach 2:
The patent implements parameter changes by systematically varying at least one radar transmission parameter across different transmission time intervals. This parameter variation creates distinctive signal signatures that enable the receiving radar to identify and suppress interfering signals from other radar systems, thereby resolving the contradiction between maintaining simple processing and achieving accurate detection.
2Reliability
If radar transmission parameters are varied across transmission time intervals, then interference identification and suppression capability is improved, but the complexity of signal processing increases
Solution Approach 1:
The patent applies preliminary action by pre-planning and pre-notifying the variation pattern of transmission parameters across transmission time intervals. The transmitting radar communicates its parameter variation schedule to receiving radars, enabling them to prepare appropriate interference suppression strategies in advance. This reduces the real-time processing complexity while maintaining reliable interference suppression capability.
Solution Approach 2:
The patent implements feedback mechanisms where radars monitor the received signals and the effectiveness of interference suppression, then adjust future parameter variations accordingly. This closed-loop approach enables the system to learn from past interference patterns and optimize its parameter variation strategy, improving suppression reliability without proportionally increasing processing complexity.
3Ease of manufacture
If multiple radar systems operate simultaneously with constant parameters, then system deployment is simplified, but interference between radar waveforms increases and detection reliability deteriorates
Solution Approach 1:
The patent applies periodic action by implementing regular, cyclic variation of transmission parameters across transmission time intervals. Each radar system follows a periodic pattern of parameter changes that is communicated to other systems, enabling coordinated operation. This periodic structure maintains deployment simplicity while ensuring that overlapping waveforms can be distinguished through their temporal patterns, thereby improving detection reliability in multi-radar environments.
Data Source
AI summary
Certain aspects provide a method for radar detection by an apparatus. The method generally includes transmitting a radar waveform in sets of transmission time intervals (TTIs), using a common set of radar transmission parameters in each set of TTIs, to perform detection of a target object, varying at least one of the common set of radar transmission parameters between sets of TTIs, and identifying interfering signals based on observed changes in monitored parameters of received signals across sets of TTIs due to the varying.