FMCW Radar Signal Embedding and Group Delay Filtering
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Solution Overview
Problem
Radar systems face challenges in achieving high resolution and long measurement range while effectively communicating data within signals, as data communication can complicate radar signal processing and interfere with desirable radar operation.
Innovation Solution
A combined radar and communication system that embeds an information signal into a radar waveform, filters it using a group delay function based on the relationship between beat frequency and time delay, and processes the filtered signal to detect remote objects, allowing for simultaneous radar and communication functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an information signal is embedded into a radar waveform for data communication, then communication capability is improved, but radar signal processing complexity increases
Solution Approach 1:
The patent segments the radar signal processing into two distinct paths: one for extracting communication information and another for radar detection. The received signal is separated into communication signal components and radar echo components through spectrum analysis and filtering, allowing independent processing of each function without mutual interference
Solution Approach 2:
The patent extracts the communication information signal from the composite radar waveform by identifying and removing the embedded communication components through spectrum analysis. This extraction process isolates the communication data from the radar signal, enabling clean separation of communication and radar processing functions
2Adaptability or versatility
If data is communicated within radar signals, then communication functionality is improved, but measurement precision deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into distinct regions: one for radar signals and another for communication signals. Through spectrum analysis, the system identifies and separates communication signal components from radar echo components, ensuring that communication data extraction does not interfere with radar measurement precision
Solution Approach 2:
The patent introduces spectrum analysis as an intermediary process that mediates between the communication signal extraction and radar signal processing. This intermediary step identifies the boundaries between communication and radar signals in the frequency domain, preventing mutual interference and preserving measurement precision
3Loss of information
If an information signal is embedded into a radar waveform, then communication capability is improved, but radar operation performance deteriorates
Solution Approach 1:
The patent segments the signal processing into parallel independent paths: one dedicated to communication signal extraction and another to radar detection. By processing communication and radar functions separately after spectral separation, the system ensures that embedded communication signals do not degrade radar operation reliability
Solution Approach 2:
The patent extracts communication information from the radar waveform through spectral analysis and filtering, removing the embedded communication components before radar processing. This extraction ensures that radar operation proceeds with clean, uncorrupted signals, maintaining full radar performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient and accurate data communication within radar signals, maintaining high radar performance by aligning signals in time and removing the information signal before radar processing, thus facilitating vehicle-to-vehicle communication and distance detection.
Implementation Method 1
A FMCW radar signal having an information signal embedded into a radar waveform is received and, in response thereto, a relationship is indicated in the FMCW radar signal between beat frequency magnitude and time delay
Implementation Method 2
receiver circuitry, a filter processing circuit and signal processing circuitry. The receiver circuitry is configured to receive a FMCW radar signal
Implementation Method 3
The filter processing circuit is configured to filter the information signal in the FMCW radar signal by applying a group delay function based on the relationship between beat frequency magnitude and time delay
Data Source
AI summary
Aspects of the present disclosure are directed to a method and/or apparatus involving frequency modulated continuous wave (FMCW) radar signals. As my be implemented in accordance with one or more embodiments, receiver circuitry is configured and arranged to receive a FMCW radar signal having an information signal embedded into a radar waveform, and to indicate a relationship in the FMCW radar signal between beat frequency magnitude and time delay. A filter processing circuit is configured and arranged to filter the information signal in the FMCW radar signal by applying a group delay function based on the relationship between beat frequency magnitude and time delay. Signal processing circuitry is configured and arranged to detect a remote object by using the filtered FMCW radar signal.