High resolution radar with communication
Frequency combs increase radar bandwidth and enable 6G integration
Exhibitors
Location
Hall 11, Stand B06
Description
A change is currently taking place in radar technology. Analog sensors are being replaced by systems with digital modulation processes, which have a major advantage: They can also be used for communication. For some years now, intensive research has been carried out into using the OFDM (Orthogonal Frequency-Division Multiplexing) modulation method, which has been used in WLAN and LTE to date, for radar applications. If OFDM is used, however, the radar signal can become part of a joint communication and sensing system. The sampling rates of the DA and AD converters for OFDM radars must be more than ten times higher than for FMCW. This would be extremely expensive given the high bandwidths required for precise radar systems.
Researchers at the Institute of High Frequency Technology and Electronics (IHE) at KIT have found a way to increase the signal bandwidth in the radar channel without having to increase the sampling rates of the converters at the same time, so that very cost-effective converters can be used. For this purpose, a narrowband OFDM signal is mixed up with a frequency comb whose comb frequencies have exactly the same spacing as the baseband signal. Because only a small proportion of the possible subcarriers are used, gaps are created. These are used in the receiver to combine all subcarriers of the broadband signal in a narrow frequency band. After scanning, they can be separated and digitally recombined to form the broadband spectrum. The method ensures a high range resolution of the radar at favorable conditions and is versatile thanks to its digital combinability.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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