A switching device for a radar target emulator is provided comprising: at least one first switch arrangement and a second switch arrangement, each having a branching device designed to receive a first input signal and diverge it into a branch signal and a first output signal, a switch adapted to transmit the branch signal in a first switching state within the switch arrangement and to not transmit in a second switching state, and adding means designed to emit the signal transmitted in the first switching state of the switch, at least as components of a second output signal. The first switching arrangement and the second switching arrangement are interconnected in such a way that a first input signal of the second switching arrangement comprises a first output signal of the first switching arrangement, or a second input signal of the second switching arrangement comprises a second output of the first switching arrangement.

A computing device receives a setup command and signals mobile robots to move sensor targets into positions within a predetermined range of a turntable. Each mobile robot may be coupled to a sensor target. Once the sensor targets are moved into the positions, calibration may be initiated, in which a vehicle is rotated using the turntable, and sensors coupled to the vehicle are calibrated based on detection of the sensor targets. The computing device may signal the mobile robots to adjust the sensor targets as needed, or, after calibration, to move into storage or charging positions.

Systems and methods for modulation and demodulation using a micro-Doppler effect are described. In an embodiment, the method includes radiating, using a picosecond pulse generator with an antenna, a train of THz pulses that form a frequency comb, where the frequency comb is reflected from an object such that the frequency several tones in the frequency comb are shifted based on the speed of the object and demodulating the reflected frequency comb to recover a THz Doppler signature of the object.

Methods and systems for generating and utilizing an emulated radar data cube are disclosed. An emulated radar transmission waveform is defined based on expected radar performance. A virtual real world scenario comprising one or more virtual target objects is constructed. The virtual target objects emulate reflection and scattering properties to an input radar wave of real world objects. Operations of radar transmit and receive channels including an antenna array and free space propagation are emulated to obtain emulated raw radar data. Data processing is performed on the emulated raw radar data to build an emulated radar data cube. The emulated radar data cube is utilized to test a radar perception algorithm.

In an embodiment, a method for testing a millimeter-wave radar module includes: providing power to the millimeter-wave radar module; performing a plurality of tests indicative of a performance level of the millimeter-wave radar module; comparing respective results from the plurality of tests with corresponding test limits; and generating a flag when a result from a test of the plurality of test is outside the corresponding test limits, where performing the plurality of tests includes: transmitting a signal with a transmitting antenna coupled to a millimeter-wave radar sensor, modulating the transmitted signal with a test signal, and capturing first data from a first receiving antenna using an analog-to-digital converter of the millimeter-wave radar sensor, where generating the flag includes generating the flag based on the captured first data.

A testing device for testing a distance sensor includes a receiving element for receiving an electromagnetic free-space wave as a receive signal, and a radiating element for radiating a simulated reflection signal. The receive signal or a signal derived therefrom is routed via a time delay circuit, and is thus time-delayed to a time-delayed signal. The time-delayed signal or a signal derived therefrom is radiated as the simulated reflection signal. The time delay circuit has an analog delay path and a digital delay path. The analog delay path implements shorter time delays than the digital delay path, apart from a possible overlap region. An input switch is used to switch the receive signal or the signal derived therefrom to the input of the analog delay path or to the input of the digital delay path, and the signal becomes the time-delayed signal after passing through the connected delay path.

A test bench (1) is described and shown for testing a distance sensor (2) operating with electromagnetic waves, wherein the distance sensor (2) to be tested comprises at least one sensor radiating element (3a) for radiating a transmission signal (4) and a sensor receiving element (3b) for receiving a reflection signal, with a receptacle (5) for holding the distance sensor (2) to be tested, with an at least partially movable connecting member (6, 6m, 6s) in the radiation area of a distance sensor (2) held in the receptacle (5), with at least one test bench receiving element (7) held in the connecting member (6, 6m, 6s) for receiving a transmission signal (4) radiated by the sensor radiating element (3a), and with at least one test bench radiating element (8) held in the connecting member (6) for radiating a test bench transmitting signal (9) as a simulated reflection signal.

A reliable environment simulation, in particular for the testing of multiple input-multiple output distance sensors (2) is achieved in that at least one test bench receiving element (7, 7a, 7b) and one test bench radiating element (8, 8a, 8b) are arranged together in a movable part (6m) of the connecting member (6).

A method for testing a distance sensor includes: receiving an electromagnetic free-space wave as a receive signal; generating a simulated electromagnetic reflection signal therefrom; shifting a reflection frequency of the reflection signal by a Doppler frequency smaller than a signal bandwidth of the receive signal; converting the receive signal into a first work signal having a first work frequency smaller than a receive frequency of the receive signal; converting the first work signal into a second work signal having a second work frequency, wherein the difference between the first and second work frequencies is at least as large as the signal bandwidth plus the Doppler frequency; converting the second work signal into a third work signal having a third work frequency that corresponds to the first work frequency shifted by the Doppler frequency; increasing the third work signal by the conversion frequency; and radiating the third work signal.

A radar target simulator with no lower target distance limitation and continuous distance emulation is provided. Said radar target simulator comprises a receiving unit configured to receive a radar signal from a radar under test and to provide a corresponding receive signal, and a ramp slope estimating unit. In this context, the ramp slope estimating unit is configured to track the ramp slope of the radar under test on the basis of the receive signal.

A radar target simulator for simulating radar targets is provided. The radar target simulator has an analogue-to-digital converter having a first clock generator and a digital-to-analogue converter having a second clock generator. The analogue-to-digital converter is configured to receive a radar signal transmitted by a radar system as an input signal, while the digital-to-analogue converter is configured to return an output signal to the radar system for simulation of the radar target. Further, the first and the second clock generator are configured to operate the analogue-to-digital converter and the digital-to-analogue converter at a different sampling rate in each case.