Influence of Ramp Timing Dither on Modulation-Based Radar Target Simulators

Abstract

For the development of fully-autonomously driving vehicles, advanced capabilities for sensor systems are required. With modulation-based radar target simulators, complex traffic scenarios can be simulated for automotive radars at low costs. Yet the simulation principle relies on the timings of the chirp-sequence frequency modulated continous waveform. Since small timing variations can be purposely introduced on the radar's waveform e.g. for interference mitigation techniques, the assumption of ideal timings could be violated. Therefore, this paper investigates the influences of ramp timing deviations on the target simulation. A signal model for radar timing variations for modulation-based simulators is presented. Furthermore, the influence of ramp timings on the resulting signal-to-noise ratio of simulated target responses is derived and verified by measurements.

Virtually Augmented Radar Measurements With Hardware Radar Target Simulators for Machine Learning Applications

“…With the presented RTS, it is possible to let an RuT record arbitrary combinations of scenarios and targets [13], as long as lists of detectable targets in the observed scene are available. One possible way to create a scenario is to replay real measurements by composing 𝑠 mod (𝑡) of the targets actually detected by a CFAR algorithm [12]. This is demonstrated in the left column in Fig.…”

“…While software simulations fully rely on sensor models, a radar target simulation employs actual radar sensors, thus eliminating the need to model the radar sensor. The basis of the presented approach is the replay of real measurements from target lists [12]. Before replay, the target lists are augmented by reflections from virtual objects [13].…”