White Paper: Test & Measurement

Automotive Radar – Chirp Analysis with R&S RTP Oscilloscope


Continuous wave radar signals with a linear frequency modulation are applied in many radar systems. Although the Frequency Modulated Continuous Wave (FMCW) technique has been in use for many years in a number of applications, the automotive radar market is nowadays perhaps the most prevalent application for the use of this radar waveform.

FMCW radar sensors are used in vehicles for adaptive cruise control and for blind-spot, lane-change, and cross-traffic assistants. Radar sensors for acquisition of the surroundings are key components for future vehicles with semi-autonomous and fully autonomous driving. Autonomous driving requires radars that reliably detect objects in the surrounding area. Radar makes it possible to quickly and precisely measure the radial velocity, range, azimuth, and elevation angle of multiple objects.

For this reason, the automobile industry is increasingly using this technology in advanced driver assistance systems (ADAS). Rohde & Schwarz offers test and measurement solutions for generating, measuring, and analyzing radar signals and components to ensure trouble-free operation of these sensors.

This application note focuses on how to measure and analyze FMCW radar signals with up to 6 GHz bandwidth with an R&S® RTP oscilloscope. Onboard analysis features for pulse and chirp analysis for single- and multi-channel measurements are addressed as well as the combination of oscilloscope and R&S® VSE software. Measurement of an FMCW radar signal in the 77 to 81-GHz band with 4-GHz bandwidth is demonstrated.

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