Joint Radar Communications Pilot Signal Interference Mitigation
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Solution Overview
Problem
Existing radar and communications systems face challenges in mitigating interference between radar and communications signals, particularly in joint radar and communications systems where overlapping operating frequencies can reduce transmission reliability and radar sensing accuracy.
Innovation Solution
A mechanism is provided to share pilot signal information between terminals with radar and communications capabilities and those with communications-only capabilities, allowing terminals with radar capabilities to detect pilot signals and filter out interference signals, thereby enhancing radar sensing performance without the need for hardware modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radar and communications systems share overlapping operating frequencies, then spectrum efficiency is improved, but interference between radar and communications signals increases
Solution Approach 1:
The patent introduces a network device as an intermediary that collects pilot signal information from multiple terminals and provides it to radar-capable terminals. This intermediary enables coordinated operation by sharing signal information, allowing the system to maintain spectrum efficiency while mitigating interference through informed signal processing at the receiver side.
Solution Approach 2:
The system implements feedback mechanisms where terminals report pilot signal information to the network device, which then distributes this information back to terminals for interference mitigation. This feedback loop enables dynamic adaptation to changing interference conditions while maintaining efficient spectrum utilization.
2Reliability
If multiple interference mitigation techniques are implemented in radar systems, then radar detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent enables radar-capable terminals to self-configure their interference mitigation by providing them with pilot signal information from the network device. The terminals autonomously process this information to identify and mitigate interference signals, eliminating the need for complex centralized control while improving detection reliability through informed signal processing.
3Measurement precision
If pilot signal information is shared between terminals, then interference mitigation performance is improved, but information security requirements increase
Solution Approach 1:
The patent extracts only the necessary pilot signal information (such as signal characteristics and timing) from the complete terminal data, sharing only what is needed for interference mitigation. This selective extraction approach maintains interference mitigation performance while minimizing information security risks by not exposing unnecessary terminal information.
Data Source
AI summary
The present disclosure relates to devices and methods for a system configured for joint communications and radar. The system comprises a first terminal that is capable of radar and communications and a second terminal that is capable of only communications. A network device is disclosed to provide a list to the first terminal. The list comprises pilot signal information assigned to the first terminal and the second terminal. Each pilot signal information assigned to a respective terminal comprises a pilot sequence ID, terminal ID, and timing synchronization information. The first terminal receiving the list is configured to perform radar sensing based on the list. For example, the first terminal is capable of detecting the pilot signal emitted from the second terminal and reflections thereof. Then, radar sensing (e.g., object detection) can be performed based thereon. In this way, multi-node radar sensing is achieved.