Joint Communication Radar System Using OFDM Correlation Outputs
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Solution Overview
Problem
Current radar systems lack an efficient method to integrate with communication systems for simultaneous data communication and environmental sensing, leading to increased complexity and hardware requirements.
Innovation Solution
A joint communication and radar system that utilizes the existing components of a radio communication device, such as correlators, to perform velocity and range estimation, leveraging multi-carrier signals like OFDM and 4G/5G standards without additional hardware, by using frequency estimation outputs and synchronization signal correlation outputs for radar operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate radar and communication systems are used, then both communication and radar functions can be provided, but system complexity and hardware requirements increase
Solution Approach 1:
The patent combines radar and communication systems into a single integrated system that shares common hardware components including correlators, signal processors, and antennas. The communication device performs both communication signals processing and radar signal processing using the same hardware infrastructure, thereby providing both communication and radar functions while reducing system complexity and hardware requirements.
Solution Approach 2:
The communication device is designed with multi-functionality to perform both communication and radar operations. The correlators and signal processing blocks are configured to handle both communication signal processing and radar signal processing, enabling a single device to serve multiple purposes and reducing the need for separate dedicated radar hardware.
2Reliability
If additional hardware is added for radar functionality, then radar performance improves, but system complexity and cost increase
Solution Approach 1:
The patent implements radar functionality within the existing communication device hardware by configuring the correlators and signal processing blocks to perform both communication and radar functions. This multi-functional approach enables radar performance improvement without adding separate dedicated hardware, as the same correlators are used for both communication signal processing and radar signal processing.
3Productivity
If joint communication and radar systems are implemented, then spectrum usage efficiency improves, but measurement precision requirements increase
Solution Approach 1:
The patent employs feedback mechanisms where the communication device provides frequency estimation outputs and synchronization signal correlation outputs to the radar processing block. This feedback loop enables the radar to utilize communication signal processing results to improve its velocity and range estimation accuracy, achieving high measurement precision while maintaining spectrum usage efficiency through the shared hardware infrastructure.
Data Source
AI summary
A radar including an interface configured to receive a frequency estimation output and a synchronization signal correlation output from a radio communication device; and a processing block configured to use the received frequency estimation output and synchronization signal correlation output for velocity and range estimation.