A Systematic Comparison of Near-Field Beamforming and Fourier-Based Backward-Wave Holographic Imaging
| Autor: | Carsten Monka-Ewe, Fabian Schwartau, Sebastian Paul, Wolfgang Kowalsky, Markus Krueckemeier, Joerg Schoebel, Reinhard Caspary |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Beamforming
Computer science ddc:621.3 Iterative reconstruction TK5101-6720 backward-wave reconstruction Article law.invention Near-field beamforming law Radar imaging ddc:6 Veröffentlichung der TU Braunschweig Electrical and Electronic Engineering Radar ddc:62 Equivalence (measure theory) Signal processing Near-field beamforming -- backward-wave reconstruction -- radar imaging Reconstruction algorithm Angular spectrum method radar imaging Telecommunication ddc:621 Publikationsfonds der TU Braunschweig Algorithm |
| Zdroj: | IEEE Open Journal of Antennas and Propagation, Vol 2, Pp 921-931 (2021) IEEE Open Journal of Antennas and Propagation 2 (2021) p. 921-931. https://doi.org/10.1109/OJAP.2021.3107444--https://doi.org/10.1109/OJAP--https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8566058--http://www.bibliothek.uni-regensburg.de/ezeit/?3006283--2637-6431 |
| ISSN: | 2637-6431 |
| Popis: | In this paper we show the equivalence of near-field beamforming and backward-wave reconstruction algorithm. The proof is carried out analytically with two different approaches, using the principle of stationary phase from a signal processing point of view and the angular spectrum representation as an electromagnetic point of view. A comparison of the time complexity of the near-field beamforming and backward-wave reconstruction algorithm is given. A detailed discussion of the constraints required for a digital implementation is presented, leading to limitations for the chosen system parameters, especially for the backward-wave reconstruction approach. An exemplarily scenario is simulated and processed, confirming the found equivalence between the two very different approaches of image reconstruction. An additional measurement with a 120 GHz radar showcases the capabilities of both algorithms and validates our findings. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|