Combining an FMCW radar system with FSK modulation to a joint communication and sensing system

Faghih-Naini S, Schneider M, Peters S, Weigel R, Reißland T (2025)

Publication Type: Journal article

Publication year: 2025

Journal

DOI: 10.1017/S1759078725000121

Abstract

Due to the rising occupancy of the radio spectrum, new strategies for covering the ever increasing amount of data are necessary. This work presents a system for integrating data transmission into a frequency-modulated continuous wave (FMCW) radar by modulating the radar signal with frequency shift keying (FSK). The system offers a high chirp bandwidth of 5 GHz and uses the 60 GHz band. The FSK carrier frequency affects the noise level. A higher frequency leads to a lower noise floor due to 1/f-noise but requires a higher sampling rate. Therefore, 15 MHz was chosen as a compromise. A high data rate allows for a fast data transmission but requires a short chirp time, which leads to a noisier frequency chirp. The radar parameters are also affected by this choice. This leads to a baud rate of 20.8 kbit/s. With a higher order FSK, higher data rates are possible. This proves that the data transmission via FMCW radar signals is possible and a first choice if lower data rates are sufficient, because the hardware effort is comparatively low.

Authors with CRIS profile

Involved external institutions

Hochschule Ulm Germany (DE)

How to cite

APA:

Faghih-Naini, S., Schneider, M., Peters, S., Weigel, R., & Reißland, T. (2025). Combining an FMCW radar system with FSK modulation to a joint communication and sensing system. International Journal of Microwave and Wireless Technologies. https://doi.org/10.1017/S1759078725000121

MLA:

Faghih-Naini, Samira, et al. "Combining an FMCW radar system with FSK modulation to a joint communication and sensing system." International Journal of Microwave and Wireless Technologies (2025).

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