Range-angle coupling and near-field effects of very large arrays in mm-wave imaging radars

A Dürr, B Schneele, D Schwarz… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
In order to improve the resolution of imaging radars, electrically large arrays and a high
absolute modulation bandwidth are needed. For radar systems with simultaneously high …

Sectorized FMCW MIMO radar by modular design with non-uniform sparse arrays

CA Alistarh, SK Podilchak, PDH Re… - IEEE Journal of …, 2022 - ieeexplore.ieee.org
Automotive radars are designed to enhance road user safety and reduce the number of
accidents on public roads and there is a constant demand to improve the performance for …

Calibration-based phase coherence of incoherent and quasi-coherent 160-GHz MIMO radars

A Dürr, R Kramer, D Schwarz, M Geiger… - IEEE Transactions …, 2020 - ieeexplore.ieee.org
Imaging radars are usually realized fully coherently. However, the distribution of one
common radio frequency signal to all transmit and receive paths requires a high degree of …

Novel movement-based methods for the calibration of colocated multiple-input multiple-output radars

G Guerzoni, E Faghand, GM Vitetta, L Vincenzi… - IEEE …, 2023 - ieeexplore.ieee.org
It is well-known that the availability of transmit and receive arrays in colocated multiple-input
multiple-output radar systems can be exploited to detect multiple targets, and estimate their …

Coherent measurements of a multistatic MIMO radar network with phase noise optimized non-coherent signal synthesis

A Dürr, D Böhm, D Schwarz, S Häfner… - IEEE Journal of …, 2022 - ieeexplore.ieee.org
For multistatic radar networks in the upper mm-wave range with a large spacing between its
radar sensor nodes, a coherent signal distribution is very complex and thus very costly …

Highly efficient angular array calibration based on the modal wave expansion technique

A Dürr, M Linder, D Schwarz… - IEEE Open Journal of …, 2021 - ieeexplore.ieee.org
In the upper millimeter wave range above 100 GHz, the effect of array imperfections like
manufacturing uncertainties and mutual antenna coupling increases, which leads to …

Sparse automotive MIMO radar for super-resolution single snapshot DOA estimation with mutual coupling

N Amani, F Jansen, A Filippi, MV Ivashina… - IEEE …, 2021 - ieeexplore.ieee.org
A novel sparse automotive multiple-input multiple-output (MIMO) radar configuration is
proposed for low-complexity super-resolution single snapshot direction-of-arrival (DOA) …

Compensation of motion-induced phase errors and enhancement of Doppler unambiguity in TDM–MIMO systems by model-based estimation

S Häfner, R Thomä - IEEE Sensors Letters, 2020 - ieeexplore.ieee.org
Utilization of multiple input multiple output (MIMO) systems in radar and channel sounding
has gained increased attention in recent years. Quite often, time-division multiplexing (TDM) …

Highly efficient calibration of antenna arrays by active targets in the near-field

M Linder, B Meinecke, E Halici… - IEEE Open Journal …, 2023 - ieeexplore.ieee.org
To enhance the capabilities of high-resolution imaging or beamforming, the trend goes
towards arrays with high-channel count and large aperture sizes. The operation at …

Mutual coupling and channel imbalance calibration of colocated MIMO radars

RL Grove, J Dall… - IEEE Open Journal of …, 2022 - ieeexplore.ieee.org
The Multiple-Input Multiple-Output (MIMO) radar combines the signals from multiple transmit
and receive elements separately to form a virtual array. Consequently, system imperfections …