Radar Scenario Generation for Automotive Applications in the E Band

Abstract

In this publication, a radar scenario generation approach for chirp sequence frequency modulated continuous wave radars simulating targets in the near-range of vehicle surroundings is presented. Key interest is the generation and the replay of arbitrary signals for a CS-FMCW radar by directly modulating the carrier signal. This approach enables the reproduction of traffic scenarios including significant micro-Doppler signatures of traffic participants. In the presented approach, the received E band signal is converted from the RF to an IF band, in which the information about velocity and range of a target is modulated with the usage of an IQ modulator. Since the working principle of the radar target simulator is not based on a delay line, the target profiles can solely be generated on the PC from where they are modulated onto the radar signal via digital-analog conversion. The modulation signals can either be generated in the time or frequency domain which allows an accurate and fast reproduction of real-world scenarios. When generated in the frequency domain, the 2D-IFFT provides an efficient way of transforming commonly used range Doppler maps into the desired modulation signals. This way, range-velocity profiles of complex traffic participants such as pedestrians or cyclists can be generated and simulated in arbitrary circumstances.INDEX TERMS Automotive radar, frequency modulation, micro-Doppler signatures, millimeter wave radar, radar target simulator.

A Unified Model of Coherent Direction-of-Arrival Simulation for Radar Target Simulators

“…In order to allow for a controlled superposition, the TEs have to be coherent to guarantee a fixed phase relation. In the following, modulation based TEs are assumed for the derivation, which means that the TEs receive the RuT's transmit signal, modulate it and transmit it back towards the RuT [8]- [11]. The block diagram of a modulation- based TE can be seen in Fig.…”