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Binary-Phase vs. Frequency Modulated Radar Measured Performances for Automotive Applications
Mattia Caffa1, Francesco Biletta1, Riccardo Maggiora1
1Department of Electronics and Telecommunications, Politecnico di Torino, 10129 Torino, Italy.
Sensors (Basel, Switzerland)
|June 10, 2023
Summary
Phase-modulated continuous wave (PMCW) radar offers superior performance over frequency-modulated continuous wave (FMCW) radar for automotive applications. Real-world tests confirm PMCW
Area of Science:
- Automotive radar technology
- Signal processing for advanced driving assistance systems
Background:
- Frequency-modulated continuous wave (FMCW) radar is prevalent in automotive applications for advanced driving assistance systems (ADAS).
- FMCW radar presents limitations including interference susceptibility, range-Doppler coupling, restricted maximum velocity, and reduced high-contrast resolution (HCR) due to sidelobes.
Purpose of the Study:
- To present the development and real-world performance evaluation of a phase-modulated continuous wave (PMCW) radar system.
- To compare the measured performance of a PMCW radar against a commercial system-on-chip (SoC) FMCW radar.
Main Methods:
- Development of a 1 Transmit / 1 Receive (1 Tx/1 Rx) binary PMCW radar using modular components and an FPGA.
- Full development and optimization of radar processing firmware for both PMCW and FMCW systems.
- Comparative analysis of captured data from PMCW and FMCW radars under real-world conditions.
Main Results:
- The PMCW radar demonstrated superior performance compared to the FMCW radar in addressing key limitations.
- Observed improvements include enhanced interference resilience, wider maximum velocity range, and better HCR.
- PMCW radar's code orthogonality facilitates interference mitigation and integration of communication and sensing functionalities.
Conclusions:
- Phase-modulated continuous wave (PMCW) radar technology shows significant advantages over FMCW for automotive radar systems.
- The experimental results validate the practical feasibility and superior performance of PMCW radar in real-world automotive scenarios.
- PMCW radar is a viable and promising technology for future advanced driving assistance systems.
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